diff --git a/internal/channel/gemini_channel.go b/internal/channel/gemini_channel.go
index 5a1676f..b44c0f2 100644
--- a/internal/channel/gemini_channel.go
+++ b/internal/channel/gemini_channel.go
@@ -36,9 +36,13 @@ func newGeminiChannel(f *Factory, group *models.Group) (ChannelProxy, error) {
 
 // ModifyRequest adds the API key as a query parameter for Gemini requests.
 func (ch *GeminiChannel) ModifyRequest(req *http.Request, apiKey *models.APIKey, group *models.Group) {
-	q := req.URL.Query()
-	q.Set("key", apiKey.KeyValue)
-	req.URL.RawQuery = q.Encode()
+	if strings.Contains(req.URL.Path, "v1beta/openai") {
+		req.Header.Set("Authorization", "Bearer "+apiKey.KeyValue)
+	} else {
+		q := req.URL.Query()
+		q.Set("key", apiKey.KeyValue)
+		req.URL.RawQuery = q.Encode()
+	}
 }
 
 // IsStreamRequest checks if the request is for a streaming response.
@@ -56,6 +60,14 @@ func (ch *GeminiChannel) IsStreamRequest(c *gin.Context, bodyBytes []byte) bool
 		return true
 	}
 
+	type streamPayload struct {
+		Stream bool `json:"stream"`
+	}
+	var p streamPayload
+	if err := json.Unmarshal(bodyBytes, &p); err == nil {
+		return p.Stream
+	}
+
 	return false
 }