Add support for Google Gemini AI

app/api/generate-ai-code-stream/route.ts

@@ -2,6 +2,7 @@ import { NextRequest, NextResponse } from 'next/server';
 import { createGroq } from '@ai-sdk/groq';
 import { createAnthropic } from '@ai-sdk/anthropic';
 import { createOpenAI } from '@ai-sdk/openai';
+import { createGoogleGenerativeAI } from '@ai-sdk/google';
 import { streamText } from 'ai';
 import type { SandboxState } from '@/types/sandbox';
 import { selectFilesForEdit, getFileContents, formatFilesForAI } from '@/lib/context-selector';
@@ -19,6 +20,10 @@ const anthropic = createAnthropic({
   baseURL: process.env.ANTHROPIC_BASE_URL || 'https://api.anthropic.com/v1',
 });
 
+const googleGenerativeAI = createGoogleGenerativeAI({
+  apiKey: process.env.GEMINI_API_KEY,
+});
+
 const openai = createOpenAI({
   apiKey: process.env.OPENAI_API_KEY,
 });
@@ -1148,11 +1153,13 @@ CRITICAL: When files are provided in the context:
         
         // Determine which provider to use based on model
         const isAnthropic = model.startsWith('anthropic/');
+        const isGoogle = model.startsWith('google/');
         const isOpenAI = model.startsWith('openai/gpt-5');
-        const modelProvider = isAnthropic ? anthropic : (isOpenAI ? openai : groq);
+        const modelProvider = isAnthropic ? anthropic : (isOpenAI ? openai : (isGoogle ? googleGenerativeAI : groq));
         const actualModel = isAnthropic ? model.replace('anthropic/', '') : 
-                           (model === 'openai/gpt-5') ? 'gpt-5' : model;
-        
+                           (model === 'openai/gpt-5') ? 'gpt-5' :
+                           (isGoogle ? model.replace('google/', '') : model);
+
         // Make streaming API call with appropriate provider
         const streamOptions: any = {
           model: modelProvider(actualModel),