fix: remove deprecated gemini-2.0-flash-preview-image-generation and gemini-2.5-flash-image-preview models (#634)

These models are being retired by Google. Remove them from the SDK type
union and model list, the test blacklist, and update template references
to use their GA successors (gemini-2.0-flash-exp-image-generation and
gemini-2.5-flash-image respectively).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: buildingvibes

packages/sdk/ts/src/supported-models/chat/gemini.ts

@@ -10,13 +10,11 @@ export type GeminiModel =
   | 'gemini-2.0-flash-lite-001'
   | 'gemini-2.0-flash-lite-preview'
   | 'gemini-2.0-flash-lite-preview-02-05'
-  | 'gemini-2.0-flash-preview-image-generation'
   | 'gemini-2.0-flash-thinking-exp'
   | 'gemini-2.0-flash-thinking-exp-01-21'
   | 'gemini-2.0-flash-thinking-exp-1219'
   | 'gemini-2.5-flash'
   | 'gemini-2.5-flash-image'
-  | 'gemini-2.5-flash-image-preview'
   | 'gemini-2.5-flash-lite'
   | 'gemini-2.5-flash-lite-preview-06-17'
   | 'gemini-2.5-flash-lite-preview-09-2025'
@@ -78,12 +76,6 @@ export const GeminiModels: SupportedModel[] = [
     output_cost_per_token: 3e-7,
     provider: 'Gemini',
   },
-  {
-    model_id: 'gemini-2.0-flash-preview-image-generation',
-    input_cost_per_token: 1e-7,
-    output_cost_per_token: 4e-7,
-    provider: 'Gemini',
-  },
   {
     model_id: 'gemini-2.0-flash-thinking-exp',
     input_cost_per_token: 1e-7,
@@ -114,12 +106,6 @@ export const GeminiModels: SupportedModel[] = [
     output_cost_per_token: 0.0000025,
     provider: 'Gemini',
   },
-  {
-    model_id: 'gemini-2.5-flash-image-preview',
-    input_cost_per_token: 3e-7,
-    output_cost_per_token: 0.0000025,
-    provider: 'Gemini',
-  },
   {
     model_id: 'gemini-2.5-flash-lite',
     input_cost_per_token: 1e-7,

packages/tests/provider-smoke/gemini-generate-text.test.ts

@@ -15,7 +15,6 @@ import {
 beforeAll(assertEnv);
 
 export const BLACKLISTED_MODELS = new Set([
-  'gemini-2.0-flash-preview-image-generation',
   'veo-3.0-fast-generate',
   'gemini-2.0-flash-exp',
   'gemini-2.0-flash-thinking-exp-1219',

templates/next-image/src/app/api/edit-image/google.ts

@@ -28,7 +28,7 @@ export async function handleGoogleEdit(
     ];
 
     const result = await generateText({
-      model: google('gemini-2.5-flash-image-preview'),
+      model: google('gemini-2.5-flash-image'),
       prompt: [
         {
           role: 'user',

templates/next-image/src/app/api/generate-image/google.ts

@@ -12,7 +12,7 @@ import { ERROR_MESSAGES } from '@/lib/constants';
 export async function handleGoogleGenerate(prompt: string): Promise<Response> {
   try {
     const result = await generateText({
-      model: google('gemini-2.5-flash-image-preview'),
+      model: google('gemini-2.5-flash-image'),
       prompt,
     });