diff --git a/src/GoogleProvider.php b/src/GoogleProvider.php
index f945596..e9a4b87 100644
--- a/src/GoogleProvider.php
+++ b/src/GoogleProvider.php
@@ -100,15 +100,26 @@ class GoogleProvider implements ProviderInterface, ImageProviderInterface, Embed
     public const MODEL_1_5_PRO = 'gemini-1.5-pro';
     public const MODEL_1_5_FLASH = 'gemini-1.5-flash';
 
-    // Imagen model aliases for image generation and editing
+    // Image generation. Imagen is retired as a product line; these replace it.
+    public const MODEL_3_1_FLASH_IMAGE = 'gemini-3.1-flash-image';
+    public const MODEL_3_1_FLASH_LITE_IMAGE = 'gemini-3.1-flash-lite-image';
+    public const MODEL_2_5_FLASH_IMAGE = 'gemini-2.5-flash-image';
+
+    /** @deprecated Imagen shuts down 17 August 2026. Use MODEL_3_1_FLASH_IMAGE. */
     public const IMAGEN_4 = 'imagen-4.0-generate-001';
+    /** @deprecated Imagen shuts down 17 August 2026. Use MODEL_3_1_FLASH_IMAGE. */
     public const IMAGEN_4_ULTRA = 'imagen-4.0-ultra-generate-001';
+    /** @deprecated Imagen shuts down 17 August 2026. Use MODEL_3_1_FLASH_IMAGE. */
     public const IMAGEN_4_FAST = 'imagen-4.0-fast-generate-001';
+    /** @deprecated Imagen 3 is already shut down. Use MODEL_3_1_FLASH_IMAGE. */
     public const IMAGEN_EDIT = 'imagen-3.0-capability-001';
 
     // Veo model aliases for video generation
     public const MODEL_VEO_3_1 = 'veo-3.1-generate-preview';
+    public const MODEL_VEO_3_1_FAST = 'veo-3.1-fast-generate-preview';
+    /** @deprecated Shut down 30 June 2026; requests fail. Use MODEL_VEO_3_1. */
     public const MODEL_VEO_3 = 'veo-3.0-generate-001';
+    /** @deprecated Shut down 30 June 2026; requests fail. Use MODEL_VEO_3_1. */
     public const MODEL_VEO_2 = 'veo-2.0-generate-001';
 
     /** @var array<string, string> tool call ID to thought signature mapping for multi-turn tool use */
@@ -286,7 +297,7 @@ public function supportsImageEditing(): bool
      */
     public function generateImage(string $prompt, array $options = []): array
     {
-        $model = $options['model'] ?? self::IMAGEN_4_FAST;
+        $model = $options['model'] ?? self::MODEL_3_1_FLASH_IMAGE;
         $numberOfImages = $options['numberOfImages'] ?? 1;
         $aspectRatio = $options['aspectRatio'] ?? '1:1';
 
@@ -486,7 +497,7 @@ public function generateVideo(string $prompt, array $options = []): VideoRespons
      */
     public function startVideo(string $prompt, array $options = []): string
     {
-        $model = $options['model'] ?? self::MODEL_VEO_3;
+        $model = $options['model'] ?? self::MODEL_VEO_3_1;
         $payload = $this->buildVideoPayload($prompt, $options);
 
         $url = self::API_BASE . "/{$model}:predictLongRunning?key={$this->apiKey}";
diff --git a/tests/Unit/GoogleVideoTest.php b/tests/Unit/GoogleVideoTest.php
index 76e9a25..780d4aa 100644
--- a/tests/Unit/GoogleVideoTest.php
+++ b/tests/Unit/GoogleVideoTest.php
@@ -24,7 +24,7 @@ class TestableVeoProvider extends GoogleProvider
 {
     public string $lastUrl = '';
     public array $lastPayload = [];
-    public array $startResponse = ['name' => 'models/veo-3.0-generate-001/operations/abc123'];
+    public array $startResponse = ['name' => 'models/veo-3.1-generate-preview/operations/abc123'];
 
     /** @var array<int, array> Queue of getRequest() responses, consumed in order */
     public array $pollResponses = [];
@@ -77,9 +77,9 @@ protected function pause(int $seconds): void
         it('posts to the predictLongRunning endpoint and returns the operation name', function () {
             $jobId = $this->provider->startVideo('a cat surfing');
 
-            expect($jobId)->toBe('models/veo-3.0-generate-001/operations/abc123');
+            expect($jobId)->toBe('models/veo-3.1-generate-preview/operations/abc123');
             expect($this->provider->lastUrl)
-                ->toContain('veo-3.0-generate-001:predictLongRunning')
+                ->toContain('veo-3.1-generate-preview:predictLongRunning')
                 ->toContain('key=test-api-key');
             expect($this->provider->lastPayload['instances'][0]['prompt'])->toBe('a cat surfing');
         });
@@ -147,12 +147,12 @@ protected function pause(int $seconds): void
                 ]]],
             ]];
 
-            $video = $this->provider->fetchVideo('models/veo-3.0-generate-001/operations/abc');
+            $video = $this->provider->fetchVideo('models/veo-3.1-generate-preview/operations/abc');
 
             expect($video)->toBeInstanceOf(VideoResponse::class);
             expect($video->data)->toBe('fake-video-binary');
             expect($video->uri)->toBe('https://files.test/clip');
-            expect($video->model)->toBe('veo-3.0-generate-001');
+            expect($video->model)->toBe('veo-3.1-generate-preview');
         });
 
         it('decodes inline base64 video bytes', function () {