diff --git a/app/openai_compat.py b/app/openai_compat.py
index 87aa012..5789ce2 100644
--- a/app/openai_compat.py
+++ b/app/openai_compat.py
@@ -106,6 +106,11 @@ def openai_to_anthropic(payload: dict) -> tuple[dict | None, str | None]:
             })
         elif role == "assistant":
             blocks: list[dict] = []
+            # 多轮重放：reasoning_content（历史轮思考文本）→ Anthropic thinking 块。
+            # 上游对 thinking 块 signature 不校验（实测伪造值可通过），空串亦可。
+            rc = msg.get("reasoning_content") or msg.get("reasoning") or msg.get("reasoning_text")
+            if isinstance(rc, str) and rc.strip():
+                blocks.append({"type": "thinking", "thinking": rc, "signature": ""})
             text = _text_from_content(content)
             if text:
                 blocks.append({"type": "text", "text": text})
@@ -148,6 +153,12 @@ def openai_to_anthropic(payload: dict) -> tuple[dict | None, str | None]:
             body["top_p"] = float(payload["top_p"])
     except (TypeError, ValueError):
         pass
+    # 推理强度：上游 GLM-5.3 系原生接受 reasoning_effort（low/high/max）。
+    # 其余值（含 off/none）不带该字段——上游不支持关闭思考，交给默认档。
+    effort = payload.get("reasoning_effort")
+    if isinstance(effort, str) and effort.strip().lower() in ("low", "high", "max"):
+        body["reasoning_effort"] = effort.strip().lower()
+
     stop = payload.get("stop")
     if isinstance(stop, str) and stop:
         body["stop_sequences"] = [stop]
@@ -186,11 +197,14 @@ def openai_to_anthropic(payload: dict) -> tuple[dict | None, str | None]:
 def anthropic_to_openai(data: dict, model: str) -> dict:
     """Anthropic message 响应 → OpenAI chat.completion。"""
     text_parts: list[str] = []
+    thinking_parts: list[str] = []
     tool_calls: list[dict] = []
     for block in data.get("content") or []:
         if not isinstance(block, dict):
             continue
-        if block.get("type") == "text" and isinstance(block.get("text"), str):
+        if block.get("type") == "thinking" and isinstance(block.get("thinking"), str):
+            thinking_parts.append(block["thinking"])
+        elif block.get("type") == "text" and isinstance(block.get("text"), str):
             text_parts.append(block["text"])
         elif block.get("type") == "tool_use":
             tool_calls.append({
@@ -205,6 +219,10 @@ def anthropic_to_openai(data: dict, model: str) -> dict:
     in_tok = _as_int(usage.get("input_tokens")) or 0
     out_tok = _as_int(usage.get("output_tokens")) or 0
     message: dict = {"role": "assistant", "content": "".join(text_parts) or None}
+    # OpenAI 兼容侧通用约定：思考文本放 reasoning_content（pi-ai/DeepSeek 风格均可识别）
+    reasoning = "\n".join(p for p in thinking_parts if p)
+    if reasoning:
+        message["reasoning_content"] = reasoning
     if tool_calls:
         message["tool_calls"] = tool_calls
     return {
@@ -261,6 +279,8 @@ def feed(self, evt: dict) -> list[str]:
             return []
         if etype == "content_block_start":
             block = evt.get("content_block") or {}
+            if block.get("type") == "thinking":
+                return [self._chunk({"reasoning_content": ""})]
             if block.get("type") == "tool_use":
                 idx = self._tool_seq
                 self._tool_seq += 1
@@ -273,6 +293,8 @@ def feed(self, evt: dict) -> list[str]:
             return []
         if etype == "content_block_delta":
             delta = evt.get("delta") or {}
+            if delta.get("type") == "thinking_delta" and isinstance(delta.get("thinking"), str):
+                return [self._chunk({"reasoning_content": delta["thinking"]})]
             if delta.get("type") == "text_delta" and isinstance(delta.get("text"), str):
                 return [self._chunk({"content": delta["text"]})]
             if delta.get("type") == "input_json_delta" and isinstance(delta.get("partial_json"), str):
diff --git a/tests/conftest.py b/tests/conftest.py
index aacfe68..1e344f8 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -71,6 +71,8 @@ def fresh_app(tmp_path, monkeypatch):
     monkeypatch.setattr(settings, "DATA_DIR", data_dir)
     monkeypatch.setattr(settings, "DB_PATH", data_dir / "accounts.db")
     monkeypatch.setattr(settings, "COOLING_SECONDS", 300)
+    # 本机 .env 的自定义 ZCODE_ADMIN_KEY 不得漏进夹具：admin 接口测试依赖默认密钥 "zcode"
+    monkeypatch.setattr(settings, "DEFAULT_ADMIN_KEY", "zcode")
 
     from app import store as store_module
     from app.store import Store
diff --git a/tests/unit/test_openai_compat.py b/tests/unit/test_openai_compat.py
index 26ba0cb..547142e 100644
--- a/tests/unit/test_openai_compat.py
+++ b/tests/unit/test_openai_compat.py
@@ -223,3 +223,128 @@ def test_unknown_events_ignored(self):
         conv.start()
         assert conv.feed({"type": "ping"}) == []
         assert conv.feed({"type": "content_block_stop", "index": 0}) == []
+
+class TestReasoningMapping:
+    """reasoning 双向映射：reasoning_effort 入站透传 + thinking 块 ↔ reasoning_content 出站。"""
+
+    def test_reasoning_effort_passthrough(self):
+        body, err = openai_to_anthropic({
+            "model": "glm-5.3",
+            "messages": [{"role": "user", "content": "hi"}],
+            "reasoning_effort": "high",
+        })
+        assert err is None
+        assert body["reasoning_effort"] == "high"
+
+    def test_reasoning_effort_normalizes_case(self):
+        body, _ = openai_to_anthropic({
+            "model": "glm-5.3",
+            "messages": [{"role": "user", "content": "hi"}],
+            "reasoning_effort": "MAX",
+        })
+        assert body["reasoning_effort"] == "max"
+
+    def test_reasoning_effort_invalid_omitted(self):
+        # 上游不支持关闭思考，off/none/未知值一律不带该字段
+        body, _ = openai_to_anthropic({
+            "model": "glm-5.3",
+            "messages": [{"role": "user", "content": "hi"}],
+            "reasoning_effort": "off",
+        })
+        assert "reasoning_effort" not in body
+
+    def test_reasoning_effort_absent(self):
+        body, _ = openai_to_anthropic({
+            "model": "glm-5.3",
+            "messages": [{"role": "user", "content": "hi"}],
+        })
+        assert "reasoning_effort" not in body
+
+    def test_assistant_reasoning_content_replays_as_thinking(self):
+        body, err = openai_to_anthropic({
+            "model": "glm-5.3",
+            "messages": [
+                {"role": "user", "content": "1+1"},
+                {"role": "assistant", "content": "2", "reasoning_content": "用户问 1+1，答案是 2"},
+                {"role": "user", "content": "再加 1"},
+            ],
+        })
+        assert err is None
+        assistant = body["messages"][1]
+        assert [b["type"] for b in assistant["content"]] == ["thinking", "text"]
+        assert assistant["content"][0]["thinking"] == "用户问 1+1，答案是 2"
+
+    def test_assistant_reasoning_alias_fields(self):
+        for alias in ("reasoning", "reasoning_text"):
+            body, _ = openai_to_anthropic({
+                "model": "glm-5.3",
+                "messages": [
+                    {"role": "assistant", "content": "ok", alias: "思考"},
+                ],
+            })
+            assert body["messages"][0]["content"][0]["type"] == "thinking"
+
+    def test_assistant_blank_reasoning_skipped(self):
+        body, _ = openai_to_anthropic({
+            "model": "glm-5.3",
+            "messages": [{"role": "assistant", "content": "ok", "reasoning_content": "   "}],
+        })
+        # 空白思考不产生 thinking 块，也不丢 assistant 消息
+        assert body["messages"][0]["content"] == [{"type": "text", "text": "ok"}]
+
+    def test_nonstream_thinking_to_reasoning_content(self):
+        data = {
+            "id": "msg_1", "type": "message", "role": "assistant", "model": "glm-5.3",
+            "content": [
+                {"type": "thinking", "thinking": "先想一下", "signature": "sig"},
+                {"type": "text", "text": "答案"},
+            ],
+            "stop_reason": "end_turn",
+            "usage": {"input_tokens": 5, "output_tokens": 9},
+        }
+        out = anthropic_to_openai(data, "glm-5.3")
+        msg = out["choices"][0]["message"]
+        assert msg["content"] == "答案"
+        assert msg["reasoning_content"] == "先想一下"
+
+    def test_nonstream_no_thinking_no_field(self):
+        data = {
+            "id": "msg_1", "type": "message", "role": "assistant", "model": "glm-5.3",
+            "content": [{"type": "text", "text": "答案"}],
+            "stop_reason": "end_turn", "usage": {"input_tokens": 5, "output_tokens": 1},
+        }
+        out = anthropic_to_openai(data, "glm-5.3")
+        assert "reasoning_content" not in out["choices"][0]["message"]
+
+    def test_stream_thinking_to_reasoning_content(self):
+        conv = StreamConverter("GLM-5.3")
+        outs = [conv.start()]
+        events = [
+            {"type": "message_start", "message": {"id": "msg_r", "usage": {"input_tokens": 3}}},
+            {"type": "content_block_start", "index": 0, "content_block": {"type": "thinking"}},
+            {"type": "content_block_delta", "index": 0, "delta": {"type": "thinking_delta", "thinking": "想"}},
+            {"type": "content_block_delta", "index": 0, "delta": {"type": "thinking_delta", "thinking": "一下"}},
+            {"type": "content_block_stop", "index": 0},
+            {"type": "content_block_start", "index": 1, "content_block": {"type": "text"}},
+            {"type": "content_block_delta", "index": 1, "delta": {"type": "text_delta", "text": "答案"}},
+            {"type": "message_delta", "delta": {"stop_reason": "end_turn"}, "usage": {"output_tokens": 4}},
+        ]
+        for evt in events:
+            outs.extend(conv.feed(evt))
+        outs.append(conv.done())
+
+        chunks = _parse_sse("".join(outs))
+        reasoning = "".join(c["choices"][0]["delta"].get("reasoning_content") or "" for c in chunks)
+        text = "".join(c["choices"][0]["delta"].get("content") or "" for c in chunks)
+        assert reasoning == "想一下"
+        assert text == "答案"
+
+    def test_stream_no_thinking_keeps_shape(self):
+        # 原有纯文本流不应引入 reasoning_content 字段（与既有客户端行为兼容）
+        conv = StreamConverter("GLM-5.3")
+        conv.start()
+        outs = conv.feed({"type": "content_block_delta", "index": 0,
+                          "delta": {"type": "text_delta", "text": "你好"}})
+        chunks = _parse_sse("".join(outs))
+        assert all("reasoning_content" not in c["choices"][0]["delta"] for c in chunks)
+