feat(config):更新默认模型和相关配置

更新默认模型和相关配置：
- 将默认测试模型从 gemini-1.5-flash 更新为 gemini-2.5-flash-lite
- 更新思考模型列表至 gemini-2.5-flash 和 gemini-2.5-pro
- 添加新的图像模型 gemini-2.5-flash-image-preview
- 更新搜索模型配置以支持最新的 Gemini 2.5 系列
- 同步更新文档中的模型配置说明

.env.example

@@ -14,11 +14,11 @@ AUTH_TOKEN=sk-123456
 VERTEX_API_KEYS=["AQ.Abxxxxxxxxxxxxxxxxxxx"]
 # For Vertex AI Platform Express API Base URL
 VERTEX_EXPRESS_BASE_URL=https://aiplatform.googleapis.com/v1beta1/publishers/google
-TEST_MODEL=gemini-1.5-flash
-THINKING_MODELS=["gemini-2.5-flash-preview-04-17"]
-THINKING_BUDGET_MAP={"gemini-2.5-flash-preview-04-17": 4000}
-IMAGE_MODELS=["gemini-2.0-flash-exp"]
-SEARCH_MODELS=["gemini-2.0-flash-exp","gemini-2.0-pro-exp"]
+TEST_MODEL=gemini-2.5-flash-lite
+THINKING_MODELS=["gemini-2.5-flash","gemini-2.5-pro"]
+THINKING_BUDGET_MAP={"gemini-2.5-flash": -1}
+IMAGE_MODELS=["gemini-2.0-flash-exp", "gemini-2.5-flash-image-preview"]
+SEARCH_MODELS=["gemini-2.5-flash","gemini-2.5-pro"]
 FILTERED_MODELS=["gemini-1.0-pro-vision-latest", "gemini-pro-vision", "chat-bison-001", "text-bison-001", "embedding-gecko-001"]
 # 是否启用网址上下文，默认启用
 URL_CONTEXT_ENABLED=false

README.md

@@ -184,9 +184,9 @@ This endpoint is directly forwarded to official OpenAI Compatible API format end
 | `ALLOWED_TOKENS` | **Required**, list of access tokens | `[]` |
 | `AUTH_TOKEN` | Super admin token, defaults to the first of `ALLOWED_TOKENS` | `sk-123456` |
 | `ADMIN_SESSION_EXPIRE` | Admin session expiration time in seconds (5 minutes to 24 hours) | `3600` |
-| `TEST_MODEL` | Model for testing key validity | `gemini-1.5-flash` |
-| `IMAGE_MODELS` | Models supporting image generation | `["gemini-2.0-flash-exp"]` |
-| `SEARCH_MODELS` | Models supporting web search | `["gemini-2.0-flash-exp"]` |
+| `TEST_MODEL` | Model for testing key validity | `gemini-2.5-flash-lite` |
+| `IMAGE_MODELS` | Models supporting image generation | `["gemini-2.0-flash-exp", "gemini-2.5-flash-image-preview"]` |
+| `SEARCH_MODELS` | Models supporting web search | `["gemini-2.5-flash","gemini-2.5-pro"]` |
 | `FILTERED_MODELS` | Disabled models | `[]` |
 | `TOOLS_CODE_EXECUTION_ENABLED` | Enable code execution tool | `false` |
 | `SHOW_SEARCH_LINK` | Display search result links in response | `true` |

README_ZH.md

@@ -184,9 +184,9 @@ app/
 | `API_KEYS` | **必填**, Gemini API 密钥列表，用于负载均衡 | `[]` |
 | `ALLOWED_TOKENS` | **必填**, 允许访问的 Token 列表 | `[]` |
 | `AUTH_TOKEN` | 超级管理员 Token，不填则使用 `ALLOWED_TOKENS` 的第一个 | `sk-123456` |
-| `TEST_MODEL` | 用于测试密钥可用性的模型 | `gemini-1.5-flash` |
-| `IMAGE_MODELS` | 支持绘图功能的模型列表 | `["gemini-2.0-flash-exp"]` |
-| `SEARCH_MODELS` | 支持搜索功能的模型列表 | `["gemini-2.0-flash-exp"]` |
+| `TEST_MODEL` | 用于测试密钥可用性的模型 | `gemini-2.5-flash-lite` |
+| `IMAGE_MODELS` | 支持绘图功能的模型列表 | `["gemini-2.0-flash-exp", "gemini-2.5-flash-image-preview"]` |
+| `SEARCH_MODELS` | 支持搜索功能的模型列表 | `["gemini-2.5-flash","gemini-2.5-pro"]` |
 | `FILTERED_MODELS` | 被禁用的模型列表 | `[]` |
 | `TOOLS_CODE_EXECUTION_ENABLED` | 是否启用代码执行工具 | `false` |
 | `SHOW_SEARCH_LINK` | 是否在响应中显示搜索结果链接 | `true` |

app/config/config.py

@@ -73,8 +73,8 @@ class Settings(BaseSettings):
     CUSTOM_HEADERS: Dict[str, str] = {}
 
     # 模型相关配置
-    SEARCH_MODELS: List[str] = ["gemini-2.0-flash-exp"]
-    IMAGE_MODELS: List[str] = ["gemini-2.0-flash-exp"]
+    SEARCH_MODELS: List[str] = ["gemini-2.5-flash", "gemini-2.5-pro"]
+    IMAGE_MODELS: List[str] = ["gemini-2.0-flash-exp", "gemini-2.5-flash-image-preview"]
     FILTERED_MODELS: List[str] = DEFAULT_FILTER_MODELS
     TOOLS_CODE_EXECUTION_ENABLED: bool = False
     # 是否启用网址上下文

app/core/constants.py

@@ -9,7 +9,7 @@ MAX_RETRIES = 3  # 最大重试次数
 
 # 模型相关常量
 SUPPORTED_ROLES = ["user", "model", "system"]
-DEFAULT_MODEL = "gemini-1.5-flash"
+DEFAULT_MODEL = "gemini-2.5-flash-lite"
 DEFAULT_TEMPERATURE = 0.7
 DEFAULT_MAX_TOKENS = 8192
 DEFAULT_TOP_P = 0.9