Update app.py

app.py

@@ -39,7 +39,7 @@ if not REPLICATE_API_TOKEN:
 
 # Replicate API配置
 REPLICATE_BASE_URL = "https://api.replicate.com/v1"
-DEFAULT_MODEL = "anthropic/claude-3-5-sonnet"
+DEFAULT_MODEL = "anthropic/claude-3.5-sonnet"  # 使用实际存在的模型
 
 # 全局异常处理器
 @app.exception_handler(Exception)
@@ -85,20 +85,23 @@ def transform_openai_to_replicate(openai_request: Dict[str, Any], model_override
         if prompt_parts and not prompt.endswith("\n\nAssistant:"):
             prompt += "\n\nAssistant:"
         
-        # 确定使用的模型
+        # 确定使用的模型 - 使用正确的 Replicate 模型名称
         model = model_override or openai_request.get("model", DEFAULT_MODEL)
         
-        # 模型名称映射
+        # 正确的模型名称映射（基于搜索结果）
         model_mapping = {
-            "claude-4-sonnet": "anthropic/claude-3-5-sonnet",
-            "claude-3-sonnet": "anthropic/claude-3-sonnet-20240229",
-            "claude-3-haiku": "anthropic/claude-3-haiku-20240307"
+            "claude-4-sonnet": "anthropic/claude-4-sonnet",  # 最新的 Claude 4
+            "claude-3.5-sonnet": "anthropic/claude-3.5-sonnet",  # Claude 3.5 Sonnet
+            "claude-3-sonnet": "anthropic/claude-3-sonnet",  # Claude 3 Sonnet
+            "claude-3.5-haiku": "anthropic/claude-3.5-haiku",  # Claude 3.5 Haiku
+            "claude-3-haiku": "anthropic/claude-3-haiku",  # Claude 3 Haiku
         }
         
         if model in model_mapping:
             model = model_mapping[model]
         elif not model.startswith("anthropic/"):
-            model = f"anthropic/{model}"
+            # 默认使用 claude-3.5-sonnet
+            model = "anthropic/claude-3.5-sonnet"
         
         replicate_request = {
             "stream": openai_request.get("stream", False),
@@ -250,6 +253,18 @@ async def list_models():
             "created": 1677610602,
             "owned_by": "anthropic"
         },
+        {
+            "id": "claude-3.5-sonnet",
+            "object": "model",
+            "created": 1677610602,
+            "owned_by": "anthropic"
+        },
+        {
+            "id": "claude-3.5-haiku",
+            "object": "model",
+            "created": 1677610602,
+            "owned_by": "anthropic"
+        },
         {
             "id": "claude-3-sonnet",
             "object": "model",