diff --git a/providers/gemini/chat.go b/providers/gemini/chat.go
index ca9582850..8cca205b9 100644
--- a/providers/gemini/chat.go
+++ b/providers/gemini/chat.go
@@ -122,7 +122,7 @@ func ConvertFromChatOpenai(request *types.ChatCompletionRequest) (*GeminiChatReq
 
 	threshold := "BLOCK_NONE"
 
-	if strings.HasPrefix(request.Model, "gemini-2.0") {
+	if strings.HasPrefix(request.Model, "gemini-2.0") && !strings.Contains(request.Model, "thinking") {
 		threshold = "OFF"
 	}