diff --git a/backend/agenteval/evaluation/cost_tracking.py b/backend/agenteval/evaluation/cost_tracking.py
index ea41a44..5297581 100644
--- a/backend/agenteval/evaluation/cost_tracking.py
+++ b/backend/agenteval/evaluation/cost_tracking.py
@@ -1,9 +1,21 @@
-"""Cost tracking and calculation for evaluation runs."""
+"""Cost tracking for evaluation runs — pricing lookup and usage-based cost.
 
-from typing import Any
+成本口径：评测自身消耗的 LLM token（judge/generator/embedding/moderation，
+经 ModelGateway 归集进 RunSummary.eval_usage_by_purpose），按岗位所用模型的
+单价计费。被评智能体的通道用量不在口径内（tutu-api 通道不返回用量）。
+
+单价解析顺序：``data/model_pricing.json``（部署侧覆盖）→ ``DEFAULT_PRICING``。
+"""
+
+import json
+from pathlib import Path
+from typing import Any, Optional
 
 from pydantic import BaseModel, Field
 
+# data/model_pricing.json：与 DB 同目录，部署时挂载覆盖，缺省文件视为无覆盖
+_PRICING_FILE = Path(__file__).resolve().parents[3] / "data" / "model_pricing.json"
+
 
 class ModelPricing(BaseModel):
     """Pricing for a model (per 1M tokens)."""
@@ -13,16 +25,8 @@ class ModelPricing(BaseModel):
     completion_cost_per_1m: float = Field(description="Cost per 1M completion tokens in USD")
 
 
-class TokenUsage(BaseModel):
-    """Token usage for a single API call."""
-
-    prompt_tokens: int = 0
-    completion_tokens: int = 0
-    total_tokens: int = 0
-
-
 class CostBreakdown(BaseModel):
-    """Cost breakdown for a turn, case, or run."""
+    """Cost breakdown for one usage bucket (e.g. one purpose or a whole run)."""
 
     prompt_tokens: int = 0
     completion_tokens: int = 0
@@ -40,118 +44,99 @@ DEFAULT_PRICING: dict[str, ModelPricing] = {
     "claude-3-haiku": ModelPricing(model_id="claude-3-haiku", prompt_cost_per_1m=0.25, completion_cost_per_1m=1.25),
 }
 
+_pricing_overrides: Optional[dict[str, ModelPricing]] = None
+
+
+def _load_overrides() -> dict[str, ModelPricing]:
+    """Parse data/model_pricing.json once; a missing/broken file means no override."""
+    global _pricing_overrides
+    if _pricing_overrides is not None:
+        return _pricing_overrides
+    overrides: dict[str, ModelPricing] = {}
+    try:
+        raw = json.loads(_PRICING_FILE.read_text(encoding="utf-8"))
+        if isinstance(raw, dict):
+            for name, entry in raw.items():
+                try:
+                    overrides[str(name)] = ModelPricing(model_id=str(name), **(entry or {}))
+                except Exception:
+                    continue
+    except (OSError, ValueError):
+        pass
+    _pricing_overrides = overrides
+    return overrides
+
+
+def reload_pricing_overrides() -> None:
+    """Drop the cached overrides so the next get_pricing() re-reads the file."""
+    global _pricing_overrides
+    _pricing_overrides = None
+
+
+def get_pricing(model_name: Optional[str]) -> Optional[ModelPricing]:
+    """Resolve pricing for a model name; None when the model is unknown."""
+    if not model_name:
+        return None
+    return _load_overrides().get(model_name) or DEFAULT_PRICING.get(model_name)
+
 
 def calculate_cost(
     prompt_tokens: int,
     completion_tokens: int,
     pricing: ModelPricing,
 ) -> float:
-    """Calculate cost in USD for given token usage and pricing.
-
-    Args:
-        prompt_tokens: Number of prompt tokens
-        completion_tokens: Number of completion tokens
-        pricing: Model pricing configuration
-
-    Returns:
-        Cost in USD
-    """
+    """Calculate cost in USD for given token usage and pricing."""
     prompt_cost = (prompt_tokens / 1_000_000) * pricing.prompt_cost_per_1m
     completion_cost = (completion_tokens / 1_000_000) * pricing.completion_cost_per_1m
     return prompt_cost + completion_cost
 
 
-def aggregate_token_usage(turns: list[dict[str, Any]]) -> TokenUsage:
-    """Aggregate token usage from a list of turns.
-
-    Args:
-        turns: List of turn dicts with optional token fields
-
-    Returns:
-        Aggregated token usage
-    """
-    prompt_tokens = sum(t.get("prompt_tokens") or 0 for t in turns)
-    completion_tokens = sum(t.get("completion_tokens") or 0 for t in turns)
-    return TokenUsage(
+def usage_breakdown(usage: dict[str, Any], pricing: ModelPricing) -> CostBreakdown:
+    """Turn one recorded usage dict (prompt/completion tokens) into a CostBreakdown."""
+    prompt_tokens = int(usage.get("prompt_tokens") or 0)
+    completion_tokens = int(usage.get("completion_tokens") or 0)
+    return CostBreakdown(
         prompt_tokens=prompt_tokens,
         completion_tokens=completion_tokens,
         total_tokens=prompt_tokens + completion_tokens,
+        cost_usd=calculate_cost(prompt_tokens, completion_tokens, pricing),
     )
 
 
-def calculate_turn_cost(
-    turn: dict[str, Any],
-    pricing: ModelPricing,
-) -> CostBreakdown:
-    """Calculate cost for a single turn.
+def build_eval_cost_section(
+    usage_by_purpose: Optional[dict[str, dict[str, Any]]],
+    model_configs: Optional[dict[str, Any]],
+) -> Optional[dict[str, Any]]:
+    """Per-purpose eval-LLM cost from recorded run usage; None when no usage.
 
-    Args:
-        turn: Turn dict with optional token fields
-        pricing: Model pricing configuration
-
-    Returns:
-        Cost breakdown for the turn
+    ``model_configs`` is the run summary's purpose → model snapshot map; a purpose
+    whose model has no known pricing gets ``cost_usd: None`` (tokens still shown).
     """
-    prompt_tokens = turn.get("prompt_tokens") or 0
-    completion_tokens = turn.get("completion_tokens") or 0
-    total_tokens = prompt_tokens + completion_tokens
-    cost_usd = calculate_cost(prompt_tokens, completion_tokens, pricing)
-
-    return CostBreakdown(
-        prompt_tokens=prompt_tokens,
-        completion_tokens=completion_tokens,
-        total_tokens=total_tokens,
-        cost_usd=cost_usd,
-    )
-
-
-def calculate_case_cost(
-    turns: list[dict[str, Any]],
-    pricing: ModelPricing,
-) -> CostBreakdown:
-    """Calculate cost for a case (multiple turns).
-
-    Args:
-        turns: List of turn dicts
-        pricing: Model pricing configuration
-
-    Returns:
-        Aggregated cost breakdown for the case
-    """
-    usage = aggregate_token_usage(turns)
-    cost_usd = calculate_cost(usage.prompt_tokens, usage.completion_tokens, pricing)
-
-    return CostBreakdown(
-        prompt_tokens=usage.prompt_tokens,
-        completion_tokens=usage.completion_tokens,
-        total_tokens=usage.total_tokens,
-        cost_usd=cost_usd,
-    )
-
-
-def calculate_run_cost(
-    cases: list[dict[str, Any]],
-    pricing: ModelPricing,
-) -> CostBreakdown:
-    """Calculate total cost for a run (multiple cases).
-
-    Args:
-        cases: List of case dicts, each with a 'turns' field
-        pricing: Model pricing configuration
-
-    Returns:
-        Aggregated cost breakdown for the run
-    """
-    all_turns = []
-    for case in cases:
-        all_turns.extend(case.get("turns", []))
-
-    usage = aggregate_token_usage(all_turns)
-    cost_usd = calculate_cost(usage.prompt_tokens, usage.completion_tokens, pricing)
-
-    return CostBreakdown(
-        prompt_tokens=usage.prompt_tokens,
-        completion_tokens=usage.completion_tokens,
-        total_tokens=usage.total_tokens,
-        cost_usd=cost_usd,
-    )
+    if not usage_by_purpose:
+        return None
+    model_configs = model_configs or {}
+    items: list[dict[str, Any]] = []
+    total_cost = 0.0
+    has_any_cost = False
+    for purpose, usage in sorted(usage_by_purpose.items()):
+        model_name = (model_configs.get(purpose) or {}).get("model_name")
+        pricing = get_pricing(model_name)
+        breakdown = usage_breakdown(usage, pricing) if pricing else None
+        if breakdown is not None:
+            total_cost += breakdown.cost_usd
+            has_any_cost = True
+        items.append(
+            {
+                "purpose": purpose,
+                "model_name": model_name,
+                "prompt_tokens": breakdown.prompt_tokens if breakdown else int(usage.get("prompt_tokens") or 0),
+                "completion_tokens": breakdown.completion_tokens if breakdown else int(usage.get("completion_tokens") or 0),
+                "total_tokens": breakdown.total_tokens if breakdown else int(usage.get("total_tokens") or 0),
+                "cost_usd": breakdown.cost_usd if breakdown else None,
+            }
+        )
+    return {
+        "by_purpose": items,
+        "total_tokens": sum(i["total_tokens"] for i in items),
+        "total_cost_usd": round(total_cost, 6) if has_any_cost else None,
+    }
diff --git a/backend/agenteval/evaluation/engine.py b/backend/agenteval/evaluation/engine.py
index 373af8f..d03acf3 100644
--- a/backend/agenteval/evaluation/engine.py
+++ b/backend/agenteval/evaluation/engine.py
@@ -118,6 +118,9 @@ class EvalEngine:
             max(1, get_settings().max_concurrent_rules),
         )
         self._state_lock = asyncio.Lock()
+        # 分岗位的评测侧 token 用量（ModelPurpose.value → 用量），由各规则/生成器
+        # 的按次用量归集而来，避免并发下用网关总量做差产生竞态。
+        self._usage_by_purpose: dict[str, dict[str, int]] = {}
         # Collects fatal case-level errors (e.g. dynamic message generation
         # failures) so their cause is persisted into run.summary — not just
         # emitted transiently over WebSocket.
@@ -216,6 +219,7 @@ class EvalEngine:
                 case_errors=self._case_errors or None,
                 model_configs=resolved_snapshot or None,
                 eval_token_usage=usage if usage["total_tokens"] > 0 else None,
+                eval_usage_by_purpose=self._usage_by_purpose or None,
             )
             run.status = RunStatus.COMPLETED
             run.completed_at = utc_now()
@@ -479,6 +483,8 @@ class EvalEngine:
                         gateway=self.model_gateway if model_config else None,
                     )
                     result = await rule.evaluate(case, dialog)
+                    if purpose:
+                        await self._accumulate_usage(purpose.value, rule.llm_usage)
                 except Exception as exc:
                     result = RuleResult(passed=False, reason=f"模型配置解析失败: {exc}")
                 return rule_config, is_implicit, result
@@ -571,7 +577,10 @@ class EvalEngine:
         try:
             model_config = await self._resolve_model(ModelPurpose.GENERATOR)
             if model_config:
-                content = await self.model_gateway.chat(model_config, messages_payload, temperature=0.7)
+                content, usage = await self.model_gateway.chat_with_usage(
+                    model_config, messages_payload, temperature=0.7
+                )
+                await self._accumulate_usage(ModelPurpose.GENERATOR.value, usage)
             else:
                 content = await self._generate_messages_legacy(messages_payload)
 
@@ -625,6 +634,16 @@ class EvalEngine:
             raise ValueError("LLM 返回内容为空或无法解析")
         return content
 
+    async def _accumulate_usage(self, purpose_key: str, usage: dict[str, int] | None) -> None:
+        if not usage or not usage.get("total_tokens"):
+            return
+        async with self._state_lock:
+            bucket = self._usage_by_purpose.setdefault(
+                purpose_key, {"prompt_tokens": 0, "completion_tokens": 0, "total_tokens": 0}
+            )
+            for key in bucket:
+                bucket[key] += int(usage.get(key) or 0)
+
     async def _resolve_model(self, purpose: ModelPurpose | None) -> ModelRuntimeConfig | None:
         if purpose is None:
             return None
diff --git a/backend/agenteval/evaluation/report.py b/backend/agenteval/evaluation/report.py
index 1786490..5016eae 100644
--- a/backend/agenteval/evaluation/report.py
+++ b/backend/agenteval/evaluation/report.py
@@ -12,6 +12,7 @@ from typing import Any, Optional
 from sqlmodel import Session
 
 from agenteval.evaluation.case_verdict import build_case_evidence, resolve_case_verdicts
+from agenteval.evaluation.cost_tracking import build_eval_cost_section
 from agenteval.evaluation.go_no_go import AcceptanceCriteria, evaluate_go_no_go
 from agenteval.evaluation.metrics import aggregate_runs
 from agenteval.evaluation.report_render import render_html, render_json, render_markdown
@@ -117,6 +118,8 @@ def generate_report(run_id: str, session=None) -> dict[str, Any]:
         "judged_pass_rate": judged_pass_rate,
         "avg_latency_ms": summary.avg_latency_ms,
         "eval_token_usage": summary.eval_token_usage,
+        "eval_usage_by_purpose": summary.eval_usage_by_purpose,
+        "eval_cost": build_eval_cost_section(summary.eval_usage_by_purpose, summary.model_configs),
     }
 
     # Generate go/no-go verdict（场景级验收标准优先，缺省用全局默认）
diff --git a/backend/agenteval/evaluation/report_render.py b/backend/agenteval/evaluation/report_render.py
index 5c5616b..7120d4b 100644
--- a/backend/agenteval/evaluation/report_render.py
+++ b/backend/agenteval/evaluation/report_render.py
@@ -33,6 +33,12 @@ HTML_TEMPLATE = """<!DOCTYPE html>
         .badge { padding: 2px 8px; border-radius: 4px; font-size: 12px; }
         .pass { background: #e6f7e6; color: #2e7d32; }
         .fail { background: #ffebee; color: #c62828; }
+        .verdict { border-radius: 6px; padding: 16px; margin: 24px 0; }
+        .verdict .decision { font-size: 18px; font-weight: 700; }
+        .verdict ul { margin: 8px 0 0; padding-left: 20px; }
+        .verdict-go { background: #e6f7e6; border: 1px solid #b7e0b8; color: #2e7d32; }
+        .verdict-no_go { background: #ffebee; border: 1px solid #f5c6cb; color: #c62828; }
+        .verdict-conditional { background: #fff8e1; border: 1px solid #ffe082; color: #8d6e00; }
         pre { white-space: pre-wrap; word-break: break-word; background: #f5f5f5; padding: 8px; border-radius: 4px; }
     </style>
 </head>
@@ -43,6 +49,22 @@ HTML_TEMPLATE = """<!DOCTYPE html>
         <p>评测场景：{{ report.scenario_name }}（{{ report.scenario_id }}）</p>
         <p>执行时间：{{ report.started_at }} 至 {{ report.completed_at or '进行中' }}</p>
 
+        {% if report.go_no_go %}
+        {% set gng = report.go_no_go %}
+        {% set decision_label = {'go': 'GO — 建议上线', 'no_go': 'NO-GO — 不建议上线', 'conditional': '有条件通过 — 修复后复测'} %}
+        <div class="verdict verdict-{{ gng.decision }}">
+            <div class="decision">上线评估：{{ decision_label.get(gng.decision, gng.decision) }}</div>
+            <div>{{ gng.summary }}</div>
+            {% if gng.criteria_results %}
+            <ul>
+                {% for c in gng.criteria_results %}
+                <li>{{ '✅' if c.passed else '❌' }} {{ c.detail }}</li>
+                {% endfor %}
+            </ul>
+            {% endif %}
+        </div>
+        {% endif %}
+
         <div class="summary">
             <div class="card">
                 <div class="value">{{ report.summary.total_cases }}</div>
@@ -121,6 +143,25 @@ def render_markdown(report: dict[str, Any]) -> str:
         f"**开始时间**: {report.get('started_at', '-')}  ",
         f"**完成时间**: {report.get('completed_at', '-')}  ",
         "",
+    ]
+
+    gng = report.get("go_no_go")
+    if gng:
+        decision_label = {
+            "go": "GO — 建议上线",
+            "no_go": "NO-GO — 不建议上线",
+            "conditional": "有条件通过 — 修复后复测",
+        }
+        lines += [
+            f"> **上线评估：{decision_label.get(gng.get('decision'), gng.get('decision'))}**",
+            f"> {gng.get('summary', '')}",
+        ]
+        for c in gng.get("criteria_results") or []:
+            mark = "✅" if c.get("passed") else "❌"
+            lines.append(f"> {mark} {c.get('detail', '')}")
+        lines.append("")
+
+    lines += [
         "## 汇总",
         "",
         "| 指标 | 数值 |",
@@ -134,6 +175,26 @@ def render_markdown(report: dict[str, Any]) -> str:
         f"| 连通用例 | {s.get('connectivity_cases', 0)} |",
         f"| 判定型通过率 | {judged_rate_text} |",
         "",
+    ]
+
+    cost = s.get("eval_cost")
+    if cost:
+        purpose_labels = {"judge": "评分判定", "generator": "用例生成", "embedding": "语义向量", "moderation": "安全审核"}
+        lines += [
+            "## 评测成本",
+            "",
+            "| 岗位 | 模型 | Token | 成本 (USD) |",
+            "|------|------|------|------|",
+        ]
+        for item in cost.get("by_purpose") or []:
+            label = purpose_labels.get(item.get("purpose"), item.get("purpose") or "-")
+            cost_text = "—" if item.get("cost_usd") is None else f"${item['cost_usd']:.6f}"
+            lines.append(f"| {label} | {item.get('model_name') or '-'} | {item.get('total_tokens', 0)} | {cost_text} |")
+        total_cost = cost.get("total_cost_usd")
+        total_text = "—" if total_cost is None else f"${total_cost:.6f}"
+        lines += [f"| **合计** | | {cost.get('total_tokens', 0)} | {total_text} |", ""]
+
+    lines += [
         "## 用例明细",
         "",
     ]
diff --git a/backend/agenteval/evaluation/rules/base.py b/backend/agenteval/evaluation/rules/base.py
index cb8059c..c8b60ff 100644
--- a/backend/agenteval/evaluation/rules/base.py
+++ b/backend/agenteval/evaluation/rules/base.py
@@ -35,6 +35,14 @@ class EvalRule(ABC):
         self.params = params
         self.model_config = model_config
         self.gateway = gateway
+        # 本规则执行期间消耗的评测侧 token 用量（引擎按评测岗位归集）
+        self.llm_usage = {"prompt_tokens": 0, "completion_tokens": 0, "total_tokens": 0}
+
+    def _record_llm_usage(self, usage: Optional[dict[str, int]]) -> None:
+        if not usage:
+            return
+        for key in self.llm_usage:
+            self.llm_usage[key] += int(usage.get(key) or 0)
 
     @abstractmethod
     async def evaluate(self, case: Case, dialog: list[Turn]) -> RuleResult:
diff --git a/backend/agenteval/evaluation/rules/fluency.py b/backend/agenteval/evaluation/rules/fluency.py
index baff357..f005cf6 100644
--- a/backend/agenteval/evaluation/rules/fluency.py
+++ b/backend/agenteval/evaluation/rules/fluency.py
@@ -3,6 +3,7 @@
 import json
 
 from agenteval.evaluation.rules.base import EvalRule, RuleResult, register_rule
+from agenteval.evaluation.rules.scored_llm import call_scored_llm, parse_scored_content
 from agenteval.models import Case, Turn
 from agenteval.utils.llm import extract_reply_text
 
@@ -88,7 +89,7 @@ class FluencyRule(EvalRule):
         """Evaluate conversation fluency using the gateway."""
         system_prompt, user_prompt = self._build_prompts(conversation, custom_criteria)
         try:
-            content = await self.gateway.chat(
+            content, usage = await self.gateway.chat_with_usage(
                 self.model_config,
                 [
                     {"role": "system", "content": system_prompt},
@@ -96,7 +97,8 @@ class FluencyRule(EvalRule):
                 ],
                 temperature=0.2,
             )
-            return self._parse_score(content)
+            self._record_llm_usage(usage)
+            return parse_scored_content(content)
         except Exception as exc:
             return None, str(exc)
 
@@ -109,35 +111,8 @@ class FluencyRule(EvalRule):
         custom_criteria: str,
     ) -> tuple[float | None, str]:
         """Call LLM API directly for fluency assessment."""
-        import httpx
-
         system_prompt, user_prompt = self._build_prompts(conversation, custom_criteria)
-
-        headers = {"Content-Type": "application/json"}
-        if api_key:
-            headers["Authorization"] = f"Bearer {api_key}"
-
-        payload = {
-            "model": model,
-            "messages": [
-                {"role": "system", "content": system_prompt},
-                {"role": "user", "content": user_prompt},
-            ],
-            "temperature": 0.2,
-        }
-
-        try:
-            async with httpx.AsyncClient(timeout=60) as client:
-                resp = await client.post(api_url, headers=headers, json=payload)
-            resp.raise_for_status()
-            from agenteval.utils.llm import extract_content_from_llm_response
-
-            content = extract_content_from_llm_response(resp.json())
-            if not content:
-                return None, "LLM 返回内容为空"
-            return self._parse_score(content)
-        except Exception as exc:
-            return None, str(exc)
+        return await call_scored_llm(api_url, api_key, model, system_prompt, user_prompt)
 
     @staticmethod
     def _build_prompts(conversation: str, custom_criteria: str) -> tuple[str, str]:
@@ -158,12 +133,3 @@ class FluencyRule(EvalRule):
         )
         user_prompt = f"对话内容：\n{conversation}"
         return system_prompt, user_prompt
-
-    @staticmethod
-    def _parse_score(content: str) -> tuple[float, str]:
-        """Parse LLM response to extract score and reason."""
-        from agenteval.utils.llm import parse_json_from_llm_text
-
-        parsed = parse_json_from_llm_text(content)
-        score = float(parsed["score"])
-        return max(0.0, min(10.0, score)), parsed.get("reason", "")
diff --git a/backend/agenteval/evaluation/rules/llm_score.py b/backend/agenteval/evaluation/rules/llm_score.py
index 9ec0ae7..ececc77 100644
--- a/backend/agenteval/evaluation/rules/llm_score.py
+++ b/backend/agenteval/evaluation/rules/llm_score.py
@@ -3,11 +3,10 @@
 import asyncio
 import json
 
-import httpx
-
 from agenteval.evaluation.rules.base import EvalRule, RuleResult, register_rule
+from agenteval.evaluation.rules.scored_llm import call_scored_llm, parse_scored_content
 from agenteval.models import Case, Turn
-from agenteval.utils.llm import extract_content_from_llm_response, extract_reply_text, parse_json_from_llm_text
+from agenteval.utils.llm import extract_reply_text
 
 
 @register_rule
@@ -120,7 +119,7 @@ class LlmScoreRule(EvalRule):
     async def _call_gateway(self, question: str, reply: str, criteria: str) -> tuple[float | None, str]:
         system_prompt, user_prompt = self._prompts(question, reply, criteria)
         try:
-            content = await self.gateway.chat(
+            content, usage = await self.gateway.chat_with_usage(
                 self.model_config,
                 [
                     {"role": "system", "content": system_prompt},
@@ -128,7 +127,8 @@ class LlmScoreRule(EvalRule):
                 ],
                 temperature=0.2,
             )
-            return self._parse_score(content)
+            self._record_llm_usage(usage)
+            return parse_scored_content(content)
         except Exception as exc:
             return None, str(exc)
 
@@ -141,12 +141,6 @@ class LlmScoreRule(EvalRule):
         )
         return system_prompt, f"用户问题：{question}\n智能体回复：{reply}"
 
-    @staticmethod
-    def _parse_score(content: str) -> tuple[float, str]:
-        parsed = parse_json_from_llm_text(content)
-        score = float(parsed["score"])
-        return max(0.0, min(10.0, score)), parsed.get("reason", "")
-
     async def _call_llm(
         self,
         api_url: str,
@@ -158,28 +152,4 @@ class LlmScoreRule(EvalRule):
     ) -> tuple[float | None, str]:
         """Call the configured LLM API and parse a numeric score between 0 and 10."""
         system_prompt, user_prompt = self._prompts(question, reply, criteria)
-
-        headers = {"Content-Type": "application/json"}
-        if api_key:
-            headers["Authorization"] = f"Bearer {api_key}"
-
-        payload = {
-            "model": model,
-            "messages": [
-                {"role": "system", "content": system_prompt},
-                {"role": "user", "content": user_prompt},
-            ],
-            "temperature": 0.2,
-        }
-
-        try:
-            async with httpx.AsyncClient(timeout=60) as client:
-                resp = await client.post(api_url, headers=headers, json=payload)
-            resp.raise_for_status()
-            content = extract_content_from_llm_response(resp.json())
-            if not content:
-                return None, "LLM 返回内容为空"
-
-            return self._parse_score(content)
-        except Exception as exc:
-            return None, str(exc)
+        return await call_scored_llm(api_url, api_key, model, system_prompt, user_prompt)
diff --git a/backend/agenteval/evaluation/rules/safety.py b/backend/agenteval/evaluation/rules/safety.py
index 0f14a8b..07a36e3 100644
--- a/backend/agenteval/evaluation/rules/safety.py
+++ b/backend/agenteval/evaluation/rules/safety.py
@@ -146,7 +146,7 @@ class SafetyRule(EvalRule):
         user_prompt = f"对话上下文：\n{context}\n\n助手最后回复：{reply_text}"
 
         try:
-            content = await self.gateway.chat(
+            content, usage = await self.gateway.chat_with_usage(
                 self.model_config,
                 [
                     {"role": "system", "content": system_prompt},
@@ -154,6 +154,7 @@ class SafetyRule(EvalRule):
                 ],
                 temperature=0.1,
             )
+            self._record_llm_usage(usage)
             parsed = parse_json_from_llm_text(content)
             if parsed.get("hallucination", False):
                 return parsed.get("reason", "疑似编造事实")
diff --git a/backend/agenteval/evaluation/rules/scored_llm.py b/backend/agenteval/evaluation/rules/scored_llm.py
new file mode 100644
index 0000000..c50dc6b
--- /dev/null
+++ b/backend/agenteval/evaluation/rules/scored_llm.py
@@ -0,0 +1,51 @@
+"""Shared plumbing for rules that ask an LLM for a 0-10 score.
+
+llm_score 与 fluency 共用的直连 LLM 调用与评分解析——两处各自实现一遍的
+重复逻辑收敛到这里（v1.3.1 Phase 3 代码质量项）。
+"""
+
+import httpx
+
+from agenteval.utils.llm import extract_content_from_llm_response, parse_json_from_llm_text
+
+
+def parse_scored_content(content: str) -> tuple[float, str]:
+    """Parse an LLM reply into a clamped 0-10 score plus reason."""
+    parsed = parse_json_from_llm_text(content)
+    score = float(parsed["score"])
+    return max(0.0, min(10.0, score)), parsed.get("reason", "")
+
+
+async def call_scored_llm(
+    api_url: str,
+    api_key: str | None,
+    model: str,
+    system_prompt: str,
+    user_prompt: str,
+    timeout: float = 60.0,
+) -> tuple[float | None, str]:
+    """POST a chat request to a raw OpenAI-compatible endpoint and parse the score.
+
+    Returns (score, reason); score is None with an error message on failure.
+    """
+    headers = {"Content-Type": "application/json"}
+    if api_key:
+        headers["Authorization"] = f"Bearer {api_key}"
+    payload = {
+        "model": model,
+        "messages": [
+            {"role": "system", "content": system_prompt},
+            {"role": "user", "content": user_prompt},
+        ],
+        "temperature": 0.2,
+    }
+    try:
+        async with httpx.AsyncClient(timeout=timeout) as client:
+            resp = await client.post(api_url, headers=headers, json=payload)
+        resp.raise_for_status()
+        content = extract_content_from_llm_response(resp.json())
+        if not content:
+            return None, "LLM 返回内容为空"
+        return parse_scored_content(content)
+    except Exception as exc:
+        return None, str(exc)
diff --git a/backend/agenteval/evaluation/rules/semantic.py b/backend/agenteval/evaluation/rules/semantic.py
index 48aca69..31b359f 100644
--- a/backend/agenteval/evaluation/rules/semantic.py
+++ b/backend/agenteval/evaluation/rules/semantic.py
@@ -74,7 +74,10 @@ class SemanticSimilarityRule(EvalRule):
 
         try:
             if self.model_config and self.gateway:
-                reply_vec, ref_vec = await self.gateway.embed(self.model_config, [reply_text, reference])
+                (reply_vec, ref_vec), usage = await self.gateway.embed_with_usage(
+                    self.model_config, [reply_text, reference]
+                )
+                self._record_llm_usage(usage)
             else:
                 api_url: str | None = self.params.get("api_url")
                 api_key: str | None = self.params.get("api_key")
diff --git a/backend/agenteval/evaluation/run_summary.py b/backend/agenteval/evaluation/run_summary.py
index 3d92b30..e45356b 100644
--- a/backend/agenteval/evaluation/run_summary.py
+++ b/backend/agenteval/evaluation/run_summary.py
@@ -21,6 +21,7 @@ def build_run_summary(
     case_errors: Optional[list[dict[str, str]]] = None,
     model_configs: Optional[dict[str, Any]] = None,
     eval_token_usage: Optional[dict[str, int]] = None,
+    eval_usage_by_purpose: Optional[dict[str, dict[str, int]]] = None,
 ) -> RunSummary:
     """Compute a run's summary口径 from its authoritative case outcomes."""
     total_cases = len(case_outcomes)
@@ -50,6 +51,7 @@ def build_run_summary(
         abandonment_rate=abandonment_rate,
         avg_latency_ms=avg_latency_ms,
         eval_token_usage=eval_token_usage,
+        eval_usage_by_purpose=eval_usage_by_purpose,
         case_outcomes={
             case_id: CaseOutcomeSummary(
                 passed=o.passed, connectivity=o.connectivity, abandoned=o.abandoned
diff --git a/backend/agenteval/model_gateway.py b/backend/agenteval/model_gateway.py
index 8bdb5f7..921bafb 100644
--- a/backend/agenteval/model_gateway.py
+++ b/backend/agenteval/model_gateway.py
@@ -4,7 +4,7 @@ from typing import Any
 
 import httpx
 
-from agenteval.model_protocols import ModelProtocolAdapter, ProtocolAdapterError, get_protocol_adapter
+from agenteval.model_protocols import ProtocolAdapterError, get_protocol_adapter
 from agenteval.services.model_configs import ModelRuntimeConfig
 
 
@@ -19,13 +19,6 @@ class ModelGateway:
         # 评测侧 LLM 调用的累计 token 用量（引擎结束时写入 run summary）
         self.total_usage = {"prompt_tokens": 0, "completion_tokens": 0, "total_tokens": 0}
 
-    def _record_usage(self, adapter: ModelProtocolAdapter, data: dict[str, Any]) -> None:
-        usage = adapter.parse_usage(data)
-        if not usage:
-            return
-        for key in self.total_usage:
-            self.total_usage[key] += int(usage.get(key) or 0)
-
     async def _post(self, config: ModelRuntimeConfig, payload: dict[str, Any]) -> dict[str, Any]:
         adapter = self._adapter(config)
         try:
@@ -61,25 +54,49 @@ class ModelGateway:
         messages: list[dict[str, str]],
         temperature: float = 0.2,
     ) -> str:
+        content, _ = await self.chat_with_usage(config, messages, temperature)
+        return content
+
+    async def chat_with_usage(
+        self,
+        config: ModelRuntimeConfig,
+        messages: list[dict[str, str]],
+        temperature: float = 0.2,
+    ) -> tuple[str, dict[str, int] | None]:
+        """Like chat(), but also returns this call's token usage (None if omitted)."""
         adapter = self._adapter(config)
         try:
             payload = adapter.chat_payload(config.model_name, messages, temperature)
             data = await self._post(config, payload)
-            self._record_usage(adapter, data)
-            return adapter.parse_chat(data)
+            usage = adapter.parse_usage(data)
+            self._accumulate(usage)
+            return adapter.parse_chat(data), usage
         except ProtocolAdapterError as exc:
             raise ModelGatewayError(str(exc)) from exc
 
     async def embed(self, config: ModelRuntimeConfig, inputs: str | list[str]) -> list[list[float]]:
+        vectors, _ = await self.embed_with_usage(config, inputs)
+        return vectors
+
+    async def embed_with_usage(
+        self, config: ModelRuntimeConfig, inputs: str | list[str]
+    ) -> tuple[list[list[float]], dict[str, int] | None]:
         adapter = self._adapter(config)
         try:
             payload = adapter.embedding_payload(config.model_name, inputs)
             data = await self._post(config, payload)
-            self._record_usage(adapter, data)
-            return adapter.parse_embeddings(data)
+            usage = adapter.parse_usage(data)
+            self._accumulate(usage)
+            return adapter.parse_embeddings(data), usage
         except ProtocolAdapterError as exc:
             raise ModelGatewayError(str(exc)) from exc
 
+    def _accumulate(self, usage: dict[str, int] | None) -> None:
+        if not usage:
+            return
+        for key in self.total_usage:
+            self.total_usage[key] += int(usage.get(key) or 0)
+
     async def moderate(self, config: ModelRuntimeConfig, text: str) -> dict[str, Any]:
         adapter = self._adapter(config)
         try:
diff --git a/backend/agenteval/models.py b/backend/agenteval/models.py
index af48922..8ef11eb 100644
--- a/backend/agenteval/models.py
+++ b/backend/agenteval/models.py
@@ -200,6 +200,8 @@ class RunSummary(BaseModel):
     avg_latency_ms: Optional[float] = None
     # 评测侧 LLM 调用累计 token 用量（judge/generator 等，引擎经 ModelGateway 统计）
     eval_token_usage: Optional[dict[str, int]] = None
+    # 分岗位用量（ModelPurpose.value → 用量），成本核算按岗位 × 模型计价
+    eval_usage_by_purpose: Optional[dict[str, dict[str, int]]] = None
     case_outcomes: dict[str, CaseOutcomeSummary] = Field(default_factory=dict)
     case_errors: list[dict[str, str]] = Field(default_factory=list)
     model_configs: dict[str, Any] = Field(default_factory=dict)
diff --git a/tests/unit/test_cost_tracking.py b/tests/unit/test_cost_tracking.py
index 10676c0..a9cecfa 100644
--- a/tests/unit/test_cost_tracking.py
+++ b/tests/unit/test_cost_tracking.py
@@ -1,21 +1,18 @@
 """Tests for cost tracking module."""
 
-import pytest
-
 from agenteval.evaluation.cost_tracking import (
+    DEFAULT_PRICING,
     CostBreakdown,
     ModelPricing,
-    TokenUsage,
-    aggregate_token_usage,
-    calculate_case_cost,
+    build_eval_cost_section,
     calculate_cost,
-    calculate_run_cost,
-    calculate_turn_cost,
+    get_pricing,
+    reload_pricing_overrides,
+    usage_breakdown,
 )
 
 
 def test_model_pricing_model():
-    """ModelPricing model should work correctly."""
     pricing = ModelPricing(
         model_id="gpt-4o",
         prompt_cost_per_1m=5.0,
@@ -25,117 +22,100 @@ def test_model_pricing_model():
     assert pricing.prompt_cost_per_1m == 5.0
 
 
-def test_token_usage_model():
-    """TokenUsage model should work correctly."""
-    usage = TokenUsage(prompt_tokens=100, completion_tokens=50, total_tokens=150)
-    assert usage.prompt_tokens == 100
-    assert usage.completion_tokens == 50
-    assert usage.total_tokens == 150
-
-
 def test_calculate_cost_gpt4o_mini():
-    """Cost calculation for gpt-4o-mini should be correct."""
     pricing = ModelPricing(model_id="gpt-4o-mini", prompt_cost_per_1m=0.15, completion_cost_per_1m=0.60)
-    # 1000 prompt tokens + 500 completion tokens
-    # Cost = (1000/1M * 0.15) + (500/1M * 0.60) = 0.00015 + 0.0003 = 0.00045
+    # (1000/1M * 0.15) + (500/1M * 0.60) = 0.00015 + 0.0003 = 0.00045
     cost = calculate_cost(1000, 500, pricing)
     assert abs(cost - 0.00045) < 0.00001
 
 
 def test_calculate_cost_zero_tokens():
-    """Zero tokens should result in zero cost."""
     pricing = ModelPricing(model_id="gpt-4o", prompt_cost_per_1m=5.0, completion_cost_per_1m=15.0)
-    cost = calculate_cost(0, 0, pricing)
-    assert cost == 0.0
+    assert calculate_cost(0, 0, pricing) == 0.0
 
 
-def test_aggregate_token_usage():
-    """Aggregate token usage from multiple turns."""
-    turns = [
-        {"prompt_tokens": 100, "completion_tokens": 50},
-        {"prompt_tokens": 200, "completion_tokens": 100},
-        {"prompt_tokens": None, "completion_tokens": None},  # Missing data
-    ]
-    usage = aggregate_token_usage(turns)
-    assert usage.prompt_tokens == 300
-    assert usage.completion_tokens == 150
-    assert usage.total_tokens == 450
+def test_get_pricing_known_model():
+    pricing = get_pricing("gpt-4o-mini")
+    assert pricing is not None
+    assert pricing.prompt_cost_per_1m == DEFAULT_PRICING["gpt-4o-mini"].prompt_cost_per_1m
 
 
-def test_aggregate_token_usage_empty():
-    """Empty turns should result in zero usage."""
-    usage = aggregate_token_usage([])
-    assert usage.prompt_tokens == 0
-    assert usage.completion_tokens == 0
-    assert usage.total_tokens == 0
+def test_get_pricing_unknown_or_empty():
+    assert get_pricing("no-such-model") is None
+    assert get_pricing(None) is None
+    assert get_pricing("") is None
 
 
-def test_calculate_turn_cost():
-    """Calculate cost for a single turn."""
-    pricing = ModelPricing(model_id="gpt-4o-mini", prompt_cost_per_1m=0.15, completion_cost_per_1m=0.60)
-    turn = {"prompt_tokens": 1000, "completion_tokens": 500}
-    breakdown = calculate_turn_cost(turn, pricing)
-    assert breakdown.prompt_tokens == 1000
-    assert breakdown.completion_tokens == 500
+def test_get_pricing_override_file(tmp_path, monkeypatch):
+    override_file = tmp_path / "model_pricing.json"
+    override_file.write_text(
+        '{"custom-judge": {"prompt_cost_per_1m": 1.0, "completion_cost_per_1m": 2.0},'
+        ' "broken": "not-a-dict"}',
+        encoding="utf-8",
+    )
+    monkeypatch.setattr("agenteval.evaluation.cost_tracking._PRICING_FILE", override_file)
+    reload_pricing_overrides()
+    try:
+        pricing = get_pricing("custom-judge")
+        assert pricing is not None
+        assert pricing.completion_cost_per_1m == 2.0
+        # 覆盖优先于默认表
+        override_file.write_text(
+            '{"gpt-4o-mini": {"prompt_cost_per_1m": 9.9, "completion_cost_per_1m": 9.9}}',
+            encoding="utf-8",
+        )
+        reload_pricing_overrides()
+        assert get_pricing("gpt-4o-mini").prompt_cost_per_1m == 9.9
+        # 坏条目被跳过，不抛异常
+        assert get_pricing("broken") is None
+    finally:
+        reload_pricing_overrides()
+
+
+def test_get_pricing_missing_file_is_noop(tmp_path, monkeypatch):
+    monkeypatch.setattr("agenteval.evaluation.cost_tracking._PRICING_FILE", tmp_path / "missing.json")
+    reload_pricing_overrides()
+    try:
+        assert get_pricing("gpt-4o") is DEFAULT_PRICING["gpt-4o"]
+    finally:
+        reload_pricing_overrides()
+
+
+def test_usage_breakdown():
+    pricing = DEFAULT_PRICING["gpt-4o-mini"]
+    breakdown = usage_breakdown({"prompt_tokens": 1000, "completion_tokens": 500}, pricing)
+    assert isinstance(breakdown, CostBreakdown)
     assert breakdown.total_tokens == 1500
     assert abs(breakdown.cost_usd - 0.00045) < 0.00001
 
 
-def test_calculate_turn_cost_missing_tokens():
-    """Turn with missing token data should have zero cost."""
-    pricing = ModelPricing(model_id="gpt-4o", prompt_cost_per_1m=5.0, completion_cost_per_1m=15.0)
-    turn = {}  # No token data
-    breakdown = calculate_turn_cost(turn, pricing)
-    assert breakdown.prompt_tokens == 0
-    assert breakdown.completion_tokens == 0
+def test_usage_breakdown_missing_fields():
+    pricing = DEFAULT_PRICING["gpt-4o-mini"]
+    breakdown = usage_breakdown({}, pricing)
+    assert breakdown.total_tokens == 0
     assert breakdown.cost_usd == 0.0
 
 
-def test_calculate_case_cost():
-    """Calculate cost for a case with multiple turns."""
-    pricing = ModelPricing(model_id="gpt-4o-mini", prompt_cost_per_1m=0.15, completion_cost_per_1m=0.60)
-    turns = [
-        {"prompt_tokens": 1000, "completion_tokens": 500},
-        {"prompt_tokens": 2000, "completion_tokens": 1000},
-    ]
-    breakdown = calculate_case_cost(turns, pricing)
-    assert breakdown.prompt_tokens == 3000
-    assert breakdown.completion_tokens == 1500
-    assert breakdown.total_tokens == 4500
-    # Cost = (3000/1M * 0.15) + (1500/1M * 0.60) = 0.00045 + 0.0009 = 0.00135
-    assert abs(breakdown.cost_usd - 0.00135) < 0.00001
+def test_build_eval_cost_section_by_purpose():
+    usage = {
+        "judge": {"prompt_tokens": 1000, "completion_tokens": 500, "total_tokens": 1500},
+        "generator": {"prompt_tokens": 2000, "completion_tokens": 1000, "total_tokens": 3000},
+    }
+    model_configs = {
+        "judge": {"model_name": "gpt-4o-mini"},
+        "generator": {"model_name": "unknown-model"},
+    }
+    section = build_eval_cost_section(usage, model_configs)
+    assert section is not None
+    by_purpose = {i["purpose"]: i for i in section["by_purpose"]}
+    assert abs(by_purpose["judge"]["cost_usd"] - 0.00045) < 0.00001
+    # 未知定价：token 数仍展示，成本为空
+    assert by_purpose["generator"]["cost_usd"] is None
+    assert by_purpose["generator"]["total_tokens"] == 3000
+    assert section["total_tokens"] == 4500
+    assert abs(section["total_cost_usd"] - 0.00045) < 0.00001
 
 
-def test_calculate_run_cost():
-    """Calculate total cost for a run with multiple cases."""
-    pricing = ModelPricing(model_id="gpt-4o-mini", prompt_cost_per_1m=0.15, completion_cost_per_1m=0.60)
-    cases = [
-        {
-            "case_id": "c1",
-            "turns": [
-                {"prompt_tokens": 1000, "completion_tokens": 500},
-            ],
-        },
-        {
-            "case_id": "c2",
-            "turns": [
-                {"prompt_tokens": 2000, "completion_tokens": 1000},
-            ],
-        },
-    ]
-    breakdown = calculate_run_cost(cases, pricing)
-    assert breakdown.prompt_tokens == 3000
-    assert breakdown.completion_tokens == 1500
-    assert breakdown.total_tokens == 4500
-
-
-def test_cost_breakdown_model():
-    """CostBreakdown model should work correctly."""
-    breakdown = CostBreakdown(
-        prompt_tokens=1000,
-        completion_tokens=500,
-        total_tokens=1500,
-        cost_usd=0.001,
-    )
-    assert breakdown.prompt_tokens == 1000
-    assert breakdown.cost_usd == 0.001
+def test_build_eval_cost_section_empty():
+    assert build_eval_cost_section(None, None) is None
+    assert build_eval_cost_section({}, {}) is None
diff --git a/tests/unit/test_llm_score.py b/tests/unit/test_llm_score.py
index 4453595..8558e65 100644
--- a/tests/unit/test_llm_score.py
+++ b/tests/unit/test_llm_score.py
@@ -68,7 +68,7 @@ async def test_llm_score_passes_above_threshold():
     rule = LlmScoreRule({"api_url": "http://mock/v1/chat", "min_score": 6})
     mock_resp = _make_llm_response(score=8.0, reason="很好")
 
-    with patch("agenteval.evaluation.rules.llm_score.httpx.AsyncClient") as MockClient:
+    with patch("agenteval.evaluation.rules.scored_llm.httpx.AsyncClient") as MockClient:
         instance = MockClient.return_value.__aenter__.return_value
         instance.post = AsyncMock(return_value=mock_resp)
         result = await rule.evaluate(_case(), [_turn("优质回答")])
@@ -82,7 +82,7 @@ async def test_llm_score_fails_below_threshold():
     rule = LlmScoreRule({"api_url": "http://mock/v1/chat", "min_score": 7})
     mock_resp = _make_llm_response(score=4.0, reason="较差")
 
-    with patch("agenteval.evaluation.rules.llm_score.httpx.AsyncClient") as MockClient:
+    with patch("agenteval.evaluation.rules.scored_llm.httpx.AsyncClient") as MockClient:
         instance = MockClient.return_value.__aenter__.return_value
         instance.post = AsyncMock(return_value=mock_resp)
         result = await rule.evaluate(_case(), [_turn("差劲回答")])
@@ -96,7 +96,7 @@ async def test_llm_score_clamps_score_to_0_10():
     # API returns out-of-range score
     mock_resp = _make_llm_response(score=12.0)
 
-    with patch("agenteval.evaluation.rules.llm_score.httpx.AsyncClient") as MockClient:
+    with patch("agenteval.evaluation.rules.scored_llm.httpx.AsyncClient") as MockClient:
         instance = MockClient.return_value.__aenter__.return_value
         instance.post = AsyncMock(return_value=mock_resp)
         result = await rule.evaluate(_case(), [_turn("answer")])
@@ -110,7 +110,7 @@ async def test_llm_score_handles_content_block_array():
     rule = LlmScoreRule({"api_url": "http://mock/v1/chat", "min_score": 6})
     mock_resp = _make_content_block_response(score=7.5)
 
-    with patch("agenteval.evaluation.rules.llm_score.httpx.AsyncClient") as MockClient:
+    with patch("agenteval.evaluation.rules.scored_llm.httpx.AsyncClient") as MockClient:
         instance = MockClient.return_value.__aenter__.return_value
         instance.post = AsyncMock(return_value=mock_resp)
         result = await rule.evaluate(_case(), [_turn("answer")])
@@ -129,7 +129,7 @@ async def test_llm_score_parses_json_with_preamble():
         "choices": [{"message": {"content": 'Sure! Here is the result: {"score": 7, "reason": "decent"}'}}]
     })
 
-    with patch("agenteval.evaluation.rules.llm_score.httpx.AsyncClient") as MockClient:
+    with patch("agenteval.evaluation.rules.scored_llm.httpx.AsyncClient") as MockClient:
         instance = MockClient.return_value.__aenter__.return_value
         instance.post = AsyncMock(return_value=mock_resp)
         result = await rule.evaluate(_case(), [_turn("answer")])
@@ -142,7 +142,7 @@ async def test_llm_score_parses_json_with_preamble():
 async def test_llm_score_api_error_fails_gracefully():
     rule = LlmScoreRule({"api_url": "http://mock/v1/chat", "min_score": 6})
 
-    with patch("agenteval.evaluation.rules.llm_score.httpx.AsyncClient") as MockClient:
+    with patch("agenteval.evaluation.rules.scored_llm.httpx.AsyncClient") as MockClient:
         instance = MockClient.return_value.__aenter__.return_value
         instance.post = AsyncMock(side_effect=Exception("connection timeout"))
         result = await rule.evaluate(_case(), [_turn("answer")])
@@ -157,7 +157,7 @@ async def test_llm_score_empty_content_fails():
     mock_resp.raise_for_status = MagicMock()
     mock_resp.json = MagicMock(return_value={"choices": []})
 
-    with patch("agenteval.evaluation.rules.llm_score.httpx.AsyncClient") as MockClient:
+    with patch("agenteval.evaluation.rules.scored_llm.httpx.AsyncClient") as MockClient:
         instance = MockClient.return_value.__aenter__.return_value
         instance.post = AsyncMock(return_value=mock_resp)
         result = await rule.evaluate(_case(), [_turn("answer")])
@@ -178,7 +178,7 @@ async def test_llm_score_extracts_question_from_sent_message():
         captured_payload.update(kwargs.get("json", {}))
         return mock_resp
 
-    with patch("agenteval.evaluation.rules.llm_score.httpx.AsyncClient") as MockClient:
+    with patch("agenteval.evaluation.rules.scored_llm.httpx.AsyncClient") as MockClient:
         instance = MockClient.return_value.__aenter__.return_value
         instance.post = AsyncMock(side_effect=capture_post)
         await rule.evaluate(_case(), [_turn("答案内容", sent_text="这是用户的问题")])
@@ -208,7 +208,7 @@ async def test_llm_score_multiturn_uses_last_sent_not_prev_reply():
         _turn("第三轮AI回复", sent_text="第三轮用户问题"),
     ]
 
-    with patch("agenteval.evaluation.rules.llm_score.httpx.AsyncClient") as MockClient:
+    with patch("agenteval.evaluation.rules.scored_llm.httpx.AsyncClient") as MockClient:
         instance = MockClient.return_value.__aenter__.return_value
         instance.post = AsyncMock(side_effect=capture_post)
         await rule.evaluate(_case(), dialog)
@@ -227,7 +227,7 @@ async def test_llm_score_reason_includes_llm_detail():
     rule = LlmScoreRule({"api_url": "http://mock/v1/chat", "min_score": 5})
     mock_resp = _make_llm_response(score=3.0, reason="回复偏离主题")
 
-    with patch("agenteval.evaluation.rules.llm_score.httpx.AsyncClient") as MockClient:
+    with patch("agenteval.evaluation.rules.scored_llm.httpx.AsyncClient") as MockClient:
         instance = MockClient.return_value.__aenter__.return_value
         instance.post = AsyncMock(return_value=mock_resp)
         result = await rule.evaluate(_case(), [_turn("answer")])
diff --git a/tests/unit/test_model_runtime_integration.py b/tests/unit/test_model_runtime_integration.py
index db2ac83..7edee84 100644
--- a/tests/unit/test_model_runtime_integration.py
+++ b/tests/unit/test_model_runtime_integration.py
@@ -12,10 +12,14 @@ class FakeGateway:
         self.chat_calls = 0
         self.total_usage = {"prompt_tokens": 0, "completion_tokens": 0, "total_tokens": 0}
 
-    async def chat(self, config, messages, temperature=0.2):
+    async def chat_with_usage(self, config, messages, temperature=0.2):
         self.chat_calls += 1
         assert config.name == "生成模型"
-        return '["问题一", "问题二"]'
+        return '["问题一", "问题二"]', {"prompt_tokens": 10, "completion_tokens": 5, "total_tokens": 15}
+
+    async def chat(self, config, messages, temperature=0.2):
+        content, _ = await self.chat_with_usage(config, messages, temperature)
+        return content
 
 
 async def test_dynamic_case_uses_generator_binding_and_records_snapshot(db_session):
@@ -62,3 +66,5 @@ async def test_dynamic_case_uses_generator_binding_and_records_snapshot(db_sessi
     assert snapshot["id"] == config_id
     assert snapshot["model_name"] == "generator-v1"
     assert "api_key" not in snapshot
+    # 生成岗位的用量按次归集进 summary（分岗位成本核算的数据源）
+    assert run.summary.eval_usage_by_purpose["generator"]["total_tokens"] == 15
diff --git a/tests/unit/test_phase3_wiring.py b/tests/unit/test_phase3_wiring.py
new file mode 100644
index 0000000..e7d06a1
--- /dev/null
+++ b/tests/unit/test_phase3_wiring.py
@@ -0,0 +1,163 @@
+"""Phase 3 (v1.3.1) wiring tests: go/no-go banner render, shared scored-LLM seam,
+per-purpose usage attribution and report cost section."""
+
+import json
+from unittest.mock import AsyncMock, MagicMock, patch
+
+import pytest
+from agenteval.evaluation.report_render import render_html, render_markdown
+from agenteval.evaluation.rules.llm_score import LlmScoreRule
+from agenteval.models import Case, CaseType, Turn
+
+from tests.unit.test_phase2_wiring import report_seeded  # noqa: F401
+
+# ── 3.1 go/no-go banner in rendered reports ──────────────────────────────
+
+
+def _gng(decision: str) -> dict:
+    return {
+        "decision": decision,
+        "summary": "判定型通过率未达标",
+        "criteria_results": [{"passed": False, "detail": "判定型通过率 0% < 95%"}],
+    }
+
+
+def _report_dict(gng: dict | None) -> dict:
+    return {
+        "run_id": "r1",
+        "target_name": "T",
+        "target_id": "t",
+        "scenario_name": "S",
+        "scenario_id": "s",
+        "started_at": "2026-08-25T00:00:00",
+        "completed_at": "2026-08-25T00:10:00",
+        "status": "completed",
+        "summary": {
+            "total_cases": 1,
+            "passed_cases": 0,
+            "failed_cases": 1,
+            "total_rules": 1,
+            "passed_rules": 0,
+            "pass_rate": 0.0,
+        },
+        "go_no_go": gng,
+        "cases": [],
+    }
+
+
+def test_html_banner_renders_no_go_decision():
+    html = render_html(_report_dict(_gng("no_go")))
+    assert 'class="verdict verdict-no_go"' in html
+    assert "NO-GO — 不建议上线" in html
+    assert "判定型通过率 0% < 95%" in html
+
+
+def test_html_banner_renders_go_decision():
+    html = render_html(_report_dict(_gng("go")))
+    assert 'class="verdict verdict-go"' in html
+    assert "GO — 建议上线" in html
+
+
+def test_markdown_banner_renders_blockquote():
+    md = render_markdown(_report_dict(_gng("conditional")))
+    assert "> **上线评估：有条件通过 — 修复后复测**" in md
+    assert "> ❌ 判定型通过率 0% < 95%" in md
+
+
+def test_no_banner_when_go_no_go_absent():
+    md = render_markdown(_report_dict(None))
+    assert "上线评估" not in md
+    html = render_html(_report_dict(None))
+    assert 'class="verdict verdict-' not in html
+    assert "上线评估" not in html
+
+
+# ── 3.2 rule-level usage recording via chat_with_usage ──────────────────
+
+
+@pytest.mark.asyncio
+async def test_llm_score_rule_records_gateway_usage():
+    rule = LlmScoreRule({"criteria": "礼貌", "min_score": 5})
+
+    gateway = MagicMock()
+    gateway.chat_with_usage = AsyncMock(
+        return_value=(json.dumps({"score": 8, "reason": "ok"}), {"prompt_tokens": 100, "completion_tokens": 40, "total_tokens": 140})
+    )
+    rule.gateway = gateway
+    rule.model_config = MagicMock()
+
+    turn = Turn(
+        id="t1", run_id="r1", case_id="c1", round_index=1,
+        sent_message={"msgBody": {"content": "问题"}},
+        reply={"msgBody": {"content": "回答"}},
+        latency_ms=100,
+    )
+    result = await rule.evaluate(Case(id="c1", type=CaseType.SINGLE, messages=["x"]), [turn])
+    assert result.passed is True
+    assert rule.llm_usage == {"prompt_tokens": 100, "completion_tokens": 40, "total_tokens": 140}
+
+
+@pytest.mark.asyncio
+async def test_scored_llm_parses_direct_api_response():
+    from agenteval.evaluation.rules.scored_llm import call_scored_llm
+
+    mock_resp = MagicMock()
+    mock_resp.raise_for_status = MagicMock()
+    mock_resp.json = MagicMock(return_value={
+        "choices": [{"message": {"content": json.dumps({"score": 9, "reason": "好"})}}]
+    })
+    with patch("agenteval.evaluation.rules.scored_llm.httpx.AsyncClient") as MockClient:
+        instance = MockClient.return_value.__aenter__.return_value
+        instance.post = AsyncMock(return_value=mock_resp)
+        score, reason = await call_scored_llm("http://mock", None, "m", "sys", "user")
+    assert score == 9
+    assert reason == "好"
+
+
+# ── 3.3 report cost section from recorded per-purpose usage ─────────────
+
+
+@pytest.mark.asyncio
+async def test_report_includes_eval_cost_section(report_seeded_with_usage):
+    from agenteval.evaluation.report import generate_report
+
+    session, run_id, _ = report_seeded_with_usage
+    report = generate_report(run_id, session)
+    cost = report["summary"]["eval_cost"]
+    assert cost is not None
+    judge = next(i for i in cost["by_purpose"] if i["purpose"] == "judge")
+    assert judge["model_name"] == "gpt-4o-mini"
+    assert judge["total_tokens"] == 1500
+    assert cost["total_cost_usd"] is not None
+    assert cost["total_tokens"] == 1500
+
+    # Markdown 导出渲染成本表
+    md = render_markdown(report)
+    assert "## 评测成本" in md
+    assert "gpt-4o-mini" in md
+
+
+def test_report_cost_absent_without_usage(report_seeded):
+    from agenteval.evaluation.report import generate_report
+
+    session, run_id, _ = report_seeded
+    report = generate_report(run_id, session)
+    assert report["summary"]["eval_cost"] is None
+    assert "评测成本" not in render_markdown(report)
+
+
+@pytest.fixture()
+def report_seeded_with_usage(report_seeded):
+    """Extend the seeded failing run with per-purpose usage + model snapshots."""
+    from agenteval.storage.repository import RunRepository
+
+    session, run_id, scenario_id = report_seeded
+    run = RunRepository(session).get(run_id)
+    summary = dict(run.summary.model_dump())
+    summary["eval_usage_by_purpose"] = {
+        "judge": {"prompt_tokens": 1000, "completion_tokens": 500, "total_tokens": 1500},
+    }
+    summary["model_configs"] = {"judge": {"model_name": "gpt-4o-mini"}}
+    run.summary = summary
+    RunRepository(session).update(run)
+    return session, run_id, scenario_id