fix(logic): Use direct model name as requested

main.go

@@ -43,13 +43,6 @@ var supportedModels = []ModelInfo{
 		OwnedBy:     "google",
 		Description: "gemini-2.5-flash稳定经典专业模型",
 	},
-    {
-		ID:          "gemini-1.5-pro-latest",
-		Object:      "model",
-		Created:     time.Now().Unix(),
-		OwnedBy:     "google",
-		Description: "gemini-1.5-pro-latest 经典专业模型",
-	},
 	{
 		ID:          "gemini-2.5-pro",
 		Object:      "model",
@@ -60,11 +53,11 @@ var supportedModels = []ModelInfo{
 }
 
 // 将OpenAI模型名称映射到Gemini模型名称
+// 根据您的要求，键和值现在是相同的，不做任何转换。
 var modelMapping = map[string]string{
-	"gemini-2.5-flash-preview-05-20": "gemini-1.5-flash-latest",
-	"gemini-2.5-flash":               "gemini-1.5-flash-latest",
-    "gemini-1.5-pro-latest":            "gemini-1.5-pro-latest",
-	"gemini-2.5-pro":                 "gemini-1.5-pro-latest",
+	"gemini-2.5-flash-preview-05-20": "gemini-2.5-flash-preview-05-20",
+	"gemini-2.5-flash":               "gemini-2.5-flash",
+	"gemini-2.5-pro":                 "gemini-2.5-pro",
 }
 
 // 配置安全设置 (全部禁用)
@@ -207,10 +200,10 @@ func chatCompletionsHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	modelName, ok := modelMapping[req.Model]
-	if !ok {
-		modelName = "gemini-1.5-flash-latest" // 默认模型
-	}
+	// 根据您的要求，直接使用请求中的模型名称
+	modelName := req.Model
+	log.Printf("接收到模型请求: '%s'，将直接使用该名称。", modelName)
+
 
 	history, lastPrompt, systemInstruction := convertMessages(req.Messages)