Update ai-routes.js

ai-routes.js

@@ -180,7 +180,7 @@ async function callOpenRouterProvider(baseParams) {
 async function callGemmaProvider(baseParams) {
     const client = await getGeminiClient(); // AWAIT client
     // Gemma via Gemini SDK usually shares quota, but using different models might help
-    const fallbackModels = ['gemma-2-27b-it', 'gemma-2-9b-it']; 
+    const fallbackModels = ['gemma-3-27b-it', 'gemma-3-9b-it', 'gemma-3-4b-it']; 
     let lastError = null;
     for (const modelName of fallbackModels) {
         try {
@@ -298,7 +298,7 @@ async function streamOpenRouter(baseParams, res) {
 
 async function streamGemma(baseParams, res) {
     const client = await getGeminiClient(); // AWAIT client
-    const models = ['gemma-2-27b-it', 'gemma-2-9b-it'];
+    const models = ['gemma-3-27b-it', 'gemma-3-9b-it', 'gemma-3-4b-it'];
     let lastError = null;
     for (const modelName of models) {
         try {