feat: upgrade MiniMax default model to M3

- Add MiniMax-M3 to model list and set as default
- Keep MiniMax-M2.7 and MiniMax-M2.7-highspeed
- Remove older models (M2.5/M2.5-highspeed)
- Update related tests

.env.example

@@ -6,11 +6,11 @@ LLM_BASE_URL=https://dashscope.aliyuncs.com/compatible-mode/v1
 LLM_MODEL_NAME=qwen-plus
 
 # ===== 使用 MiniMax 模型（可选）=====
-# MiniMax M2.7: 最新旗舰模型，增强推理与编码能力
+# MiniMax M3: 最新旗舰模型，512K 上下文，128K 最大输出，支持图片输入
 # 获取 API Key: https://platform.minimax.io/
 # LLM_API_KEY=your_minimax_api_key_here
 # LLM_BASE_URL=https://api.minimax.io/v1
-# LLM_MODEL_NAME=MiniMax-M2.7
+# LLM_MODEL_NAME=MiniMax-M3
 # 国内用户可使用: LLM_BASE_URL=https://api.minimaxi.com/v1
 
 # ===== ZEP记忆图谱配置 =====

README-EN.md

@@ -135,15 +135,14 @@ ZEP_API_KEY=your_zep_api_key
 ```env
 LLM_API_KEY=your_minimax_api_key
 LLM_BASE_URL=https://api.minimax.io/v1
-LLM_MODEL_NAME=MiniMax-M2.7
+LLM_MODEL_NAME=MiniMax-M3
 ```
 
 | Model | Description |
 |-------|-------------|
-| `MiniMax-M2.7` | Latest flagship model with enhanced reasoning and coding |
+| `MiniMax-M3` | Latest flagship model, 512K context window, up to 128K output, image input support |
+| `MiniMax-M2.7` | Previous-generation flagship model |
 | `MiniMax-M2.7-highspeed` | High-speed version of M2.7 for low-latency scenarios |
-| `MiniMax-M2.5` | Flagship model, 204K context window |
-| `MiniMax-M2.5-highspeed` | Same performance, faster and more agile |
 
 For users in China: `LLM_BASE_URL=https://api.minimaxi.com/v1`
 

README.md

@@ -135,15 +135,14 @@ ZEP_API_KEY=your_zep_api_key
 ```env
 LLM_API_KEY=your_minimax_api_key
 LLM_BASE_URL=https://api.minimax.io/v1
-LLM_MODEL_NAME=MiniMax-M2.7
+LLM_MODEL_NAME=MiniMax-M3
 ```
 
 | 模型 | 说明 |
 |------|------|
-| `MiniMax-M2.7` | 最新旗舰模型，增强推理与编码能力 |
+| `MiniMax-M3` | 最新旗舰模型，512K 上下文窗口，128K 最大输出，支持图片输入 |
+| `MiniMax-M2.7` | 上一代旗舰模型 |
 | `MiniMax-M2.7-highspeed` | M2.7 高速版，低延迟场景适用 |
-| `MiniMax-M2.5` | 旗舰模型，204K 上下文窗口 |
-| `MiniMax-M2.5-highspeed` | 同等性能，更快更敏捷 |
 
 国内用户可使用：`LLM_BASE_URL=https://api.minimaxi.com/v1`
 

backend/app/utils/llm_client.py

@@ -116,7 +116,7 @@ class LLMClient:
 
         response = self.client.chat.completions.create(**kwargs)
         content = response.choices[0].message.content
-        # 部分模型（如MiniMax M2.5）会在content中包含<think>思考内容，需要移除
+        # 部分模型（如MiniMax M3 等推理型模型）会在content中包含<think>思考内容，需要移除
         content = re.sub(r'<think>[\s\S]*?</think>', '', content).strip()
         return content
 

backend/tests/test_minimax_compat.py

@@ -61,10 +61,10 @@ def _inject_json_instruction(messages):
 
 class TestIsMinimax:
     def test_minimax_model_name(self):
-        assert _is_minimax("MiniMax-M2.5", "https://api.openai.com/v1") is True
+        assert _is_minimax("MiniMax-M3", "https://api.openai.com/v1") is True
 
     def test_minimax_model_name_lowercase(self):
-        assert _is_minimax("minimax-m2.5", "https://api.openai.com/v1") is True
+        assert _is_minimax("minimax-m3", "https://api.openai.com/v1") is True
 
     def test_minimax_base_url(self):
         assert _is_minimax("some-model", "https://api.minimax.io/v1") is True
@@ -81,8 +81,8 @@ class TestIsMinimax:
     def test_none_values(self):
         assert _is_minimax(None, None) is False
 
-    def test_minimax_highspeed(self):
+    def test_minimax_m3(self):
-        assert _is_minimax("MiniMax-M2.5-highspeed", "https://api.minimax.io/v1") is True
+        assert _is_minimax("MiniMax-M3", "https://api.minimax.io/v1") is True
 
     def test_minimax_m27(self):
         assert _is_minimax("MiniMax-M2.7", "https://api.minimax.io/v1") is True
@@ -93,15 +93,15 @@ class TestIsMinimax:
 
 class TestClampTemperature:
     def test_zero_temperature_minimax(self):
-        result = _clamp_temperature(0.0, "MiniMax-M2.5", "https://api.minimax.io/v1")
+        result = _clamp_temperature(0.0, "MiniMax-M3", "https://api.minimax.io/v1")
         assert result == 0.01
 
     def test_negative_temperature_minimax(self):
-        result = _clamp_temperature(-0.1, "MiniMax-M2.5", "https://api.minimax.io/v1")
+        result = _clamp_temperature(-0.1, "MiniMax-M3", "https://api.minimax.io/v1")
         assert result == 0.01
 
     def test_valid_temperature_minimax(self):
-        result = _clamp_temperature(0.7, "MiniMax-M2.5", "https://api.minimax.io/v1")
+        result = _clamp_temperature(0.7, "MiniMax-M3", "https://api.minimax.io/v1")
         assert result == 0.7
 
     def test_zero_temperature_non_minimax(self):
@@ -109,7 +109,7 @@ class TestClampTemperature:
         assert result == 0.0
 
     def test_max_temperature_minimax(self):
-        result = _clamp_temperature(1.0, "MiniMax-M2.5", "https://api.minimax.io/v1")
+        result = _clamp_temperature(1.0, "MiniMax-M3", "https://api.minimax.io/v1")
         assert result == 1.0
 
     def test_zero_temperature_minimax_m27(self):