diff --git a/relay/channel/gemini/relay-gemini.go b/relay/channel/gemini/relay-gemini.go
index bf1ece57..bf272f90 100644
--- a/relay/channel/gemini/relay-gemini.go
+++ b/relay/channel/gemini/relay-gemini.go
@@ -57,22 +57,35 @@ func CovertGemini2OpenAI(textRequest dto.GeneralOpenAIRequest, info *relaycommon
 	}
 
 	if model_setting.GetGeminiSettings().ThinkingAdapterEnabled {
-	        if strings.HasSuffix(info.OriginModelName, "-thinking") {
-	            // 如果模型名以 gemini-2.5-pro 开头，不设置 ThinkingBudget
-	            if strings.HasPrefix(info.OriginModelName, "gemini-2.5-pro") {
-	                geminiRequest.GenerationConfig.ThinkingConfig = &GeminiThinkingConfig{
-	                    IncludeThoughts: true,
-	                }
-	            } else {
-	                budgetTokens := model_setting.GetGeminiSettings().ThinkingAdapterBudgetTokensPercentage * float64(geminiRequest.GenerationConfig.MaxOutputTokens)
-	                if budgetTokens == 0 || budgetTokens > 24576 {
-	                    budgetTokens = 24576
-	                }
-	                geminiRequest.GenerationConfig.ThinkingConfig = &GeminiThinkingConfig{
-	                    ThinkingBudget:  common.GetPointer(int(budgetTokens)),
-	                    IncludeThoughts: true,
-	                }
-	            }
+		if strings.HasSuffix(info.OriginModelName, "-thinking") {
+			// 硬编码不支持 ThinkingBudget 的旧模型
+			unsupportedModels := []string{
+				"gemini-2.5-pro-preview-05-06",
+				"gemini-2.5-pro-preview-03-25",
+			}
+
+			isUnsupported := false
+			for _, unsupportedModel := range unsupportedModels {
+				if strings.HasPrefix(info.OriginModelName, unsupportedModel) {
+					isUnsupported = true
+					break
+				}
+			}
+
+			if isUnsupported {
+				geminiRequest.GenerationConfig.ThinkingConfig = &GeminiThinkingConfig{
+					IncludeThoughts: true,
+				}
+			} else {
+				budgetTokens := model_setting.GetGeminiSettings().ThinkingAdapterBudgetTokensPercentage * float64(geminiRequest.GenerationConfig.MaxOutputTokens)
+				if budgetTokens == 0 || budgetTokens > 24576 {
+					budgetTokens = 24576
+				}
+				geminiRequest.GenerationConfig.ThinkingConfig = &GeminiThinkingConfig{
+					ThinkingBudget:  common.GetPointer(int(budgetTokens)),
+					IncludeThoughts: true,
+				}
+			}
 		} else if strings.HasSuffix(info.OriginModelName, "-nothinking") {
 			geminiRequest.GenerationConfig.ThinkingConfig = &GeminiThinkingConfig{
 				ThinkingBudget: common.GetPointer(0),