diff --git a/js/doc-snippets/src/flows/index.ts b/js/doc-snippets/src/flows/index.ts
index 05271e8dce..0f9a476fa2 100644
--- a/js/doc-snippets/src/flows/index.ts
+++ b/js/doc-snippets/src/flows/index.ts
@@ -29,7 +29,7 @@ export const menuSuggestionFlow = ai.defineFlow(
   },
   async (restaurantTheme) => {
     const { text } = await ai.generate({
-      model: googleAI.model('gemini-2.0-flash'),
+      model: googleAI.model('gemini-2.5-flash'),
       prompt: `Invent a menu item for a ${restaurantTheme} themed restaurant.`,
     });
     return text;
@@ -51,7 +51,7 @@ export const menuSuggestionFlowWithSchema = ai.defineFlow(
   },
   async (restaurantTheme) => {
     const { output } = await ai.generate({
-      model: googleAI.model('gemini-2.0-flash'),
+      model: googleAI.model('gemini-2.5-flash'),
       prompt: `Invent a menu item for a ${restaurantTheme} themed restaurant.`,
       output: { schema: MenuItemSchema },
     });
@@ -72,7 +72,7 @@ export const menuSuggestionFlowMarkdown = ai.defineFlow(
   },
   async (restaurantTheme) => {
     const { output } = await ai.generate({
-      model: googleAI.model('gemini-2.0-flash'),
+      model: googleAI.model('gemini-2.5-flash'),
       prompt: `Invent a menu item for a ${restaurantTheme} themed restaurant.`,
       output: { schema: MenuItemSchema },
     });
@@ -94,7 +94,7 @@ export const menuSuggestionStreamingFlow = ai.defineFlow(
   },
   async (restaurantTheme, { sendChunk }) => {
     const response = await ai.generateStream({
-      model: googleAI.model('gemini-2.0-flash'),
+      model: googleAI.model('gemini-2.5-flash'),
       prompt: `Invent a menu item for a ${restaurantTheme} themed restaurant.`,
     });
 
@@ -128,7 +128,7 @@ export const complexMenuSuggestionFlow = ai.defineFlow(
     outputSchema: PrixFixeMenuSchema,
   },
   async (theme: string): Promise<z.infer<typeof PrixFixeMenuSchema>> => {
-    const chat = ai.chat({ model: googleAI.model('gemini-2.0-flash') });
+    const chat = ai.chat({ model: googleAI.model('gemini-2.5-flash') });
     await chat.send('What makes a good prix fixe menu?');
     await chat.send(
       'What are some ingredients, seasonings, and cooking techniques that ' +
@@ -178,7 +178,7 @@ Today's menu
       }
     );
     const { text } = await ai.generate({
-      model: googleAI.model('gemini-2.0-flash'),
+      model: googleAI.model('gemini-2.5-flash'),
       system: "Help the user answer questions about today's menu.",
       prompt: input,
       docs: [{ content: [{ text: menu }] }],
diff --git a/js/doc-snippets/src/index.ts b/js/doc-snippets/src/index.ts
index 853a968558..a24913d9c0 100644
--- a/js/doc-snippets/src/index.ts
+++ b/js/doc-snippets/src/index.ts
@@ -19,7 +19,7 @@ import { genkit } from 'genkit';
 
 const ai = genkit({
   plugins: [googleAI()],
-  model: googleAI.model('gemini-2.0-flash'),
+  model: googleAI.model('gemini-2.5-flash'),
 });
 
 async function main() {
diff --git a/js/doc-snippets/src/models/index.ts b/js/doc-snippets/src/models/index.ts
index e3db35c5cd..c812614a87 100644
--- a/js/doc-snippets/src/models/index.ts
+++ b/js/doc-snippets/src/models/index.ts
@@ -19,13 +19,13 @@ import { genkit } from 'genkit';
 
 const ai = genkit({
   plugins: [googleAI()],
-  model: googleAI.model('gemini-2.0-flash'),
+  model: googleAI.model('gemini-2.5-flash'),
 });
 
 async function fn01() {
   // [START ex01]
   const { text } = await ai.generate({
-    model: googleAI.model('gemini-2.0-flash'),
+    model: googleAI.model('gemini-2.5-flash'),
     prompt: 'Invent a menu item for a pirate themed restaurant.',
   });
   // [END ex01]
@@ -34,7 +34,7 @@ async function fn01() {
 async function fn02() {
   // [START ex02]
   const { text } = await ai.generate({
-    model: 'googleai/gemini-2.0-flash-001',
+    model: 'googleai/gemini-2.5-flash',
     prompt: 'Invent a menu item for a pirate themed restaurant.',
   });
   // [END ex02]
diff --git a/js/doc-snippets/src/models/minimal.ts b/js/doc-snippets/src/models/minimal.ts
index 49834cd1f6..20984739e8 100644
--- a/js/doc-snippets/src/models/minimal.ts
+++ b/js/doc-snippets/src/models/minimal.ts
@@ -20,7 +20,7 @@ import { genkit } from 'genkit';
 
 const ai = genkit({
   plugins: [googleAI()],
-  model: googleAI.model('gemini-2.0-flash'),
+  model: googleAI.model('gemini-2.5-flash'),
 });
 
 async function main() {
diff --git a/js/testapps/dev-ui-gallery/prompts/code.prompt b/js/testapps/dev-ui-gallery/prompts/code.prompt
index 231bfcf249..5de2f2b927 100644
--- a/js/testapps/dev-ui-gallery/prompts/code.prompt
+++ b/js/testapps/dev-ui-gallery/prompts/code.prompt
@@ -1,5 +1,5 @@
 ---
-model: googleai/gemini-2.0-flash
+model: googleai/gemini-2.5-flash
 config:
   temperature: 0.4
   safetySettings:
diff --git a/js/testapps/dev-ui-gallery/prompts/markdown.prompt b/js/testapps/dev-ui-gallery/prompts/markdown.prompt
index 492bb26a92..d7c713d49e 100644
--- a/js/testapps/dev-ui-gallery/prompts/markdown.prompt
+++ b/js/testapps/dev-ui-gallery/prompts/markdown.prompt
@@ -1,5 +1,5 @@
 ---
-model: googleai/gemini-2.0-flash
+model: googleai/gemini-2.5-flash
 config:
   temperature: 0.4
   safetySettings:
diff --git a/js/testapps/flow-simple-ai/prompts/dotpromptContext.prompt b/js/testapps/flow-simple-ai/prompts/dotpromptContext.prompt
index f3ead5bb32..6de5bc1c94 100644
--- a/js/testapps/flow-simple-ai/prompts/dotpromptContext.prompt
+++ b/js/testapps/flow-simple-ai/prompts/dotpromptContext.prompt
@@ -1,5 +1,5 @@
 ---
-model: vertexai/gemini-2.0-flash
+model: vertexai/gemini-2.5-flash
 input:
   schema:
     question: string
diff --git a/js/testapps/flow-simple-ai/src/index.ts b/js/testapps/flow-simple-ai/src/index.ts
index bf09bfa073..acab09f8a3 100644
--- a/js/testapps/flow-simple-ai/src/index.ts
+++ b/js/testapps/flow-simple-ai/src/index.ts
@@ -151,7 +151,7 @@ export const streamFlowVertex = ai.defineFlow(
   },
   async (prompt, { sendChunk }) => {
     const { response, stream } = ai.generateStream({
-      model: vertexAI.model('gemini-2.0-flash-001', { temperature: 0.77 }),
+      model: vertexAI.model('gemini-2.5-flash', { temperature: 0.77 }),
       prompt,
     });
 
@@ -171,7 +171,7 @@ export const streamFlowGemini = ai.defineFlow(
   },
   async (prompt, { sendChunk }) => {
     const { response, stream } = ai.generateStream({
-      model: googleAI.model('gemini-2.0-flash-001', { temperature: 0.77 }),
+      model: googleAI.model('gemini-2.5-flash', { temperature: 0.77 }),
       prompt,
     });
 
@@ -207,7 +207,7 @@ export const streamJsonFlow = ai.defineFlow(
   },
   async (count, { sendChunk }) => {
     const { response, stream } = ai.generateStream({
-      model: googleAI.model('gemini-2.0-flash'),
+      model: googleAI.model('gemini-2.5-flash'),
       output: {
         schema: GameCharactersSchema,
       },
@@ -506,7 +506,7 @@ export const dynamicToolCaller = ai.defineFlow(
     );
 
     const { response, stream } = ai.generateStream({
-      model: googleAI.model('gemini-2.0-flash'),
+      model: googleAI.model('gemini-2.5-flash'),
       config: {
         temperature: 1,
       },
@@ -901,7 +901,7 @@ ai.defineFlow(
   },
   async ({ url, prompt, model }) => {
     const { text } = await ai.generate({
-      model: model || 'googleai/gemini-2.0-flash',
+      model: model || 'googleai/gemini-2.5-flash',
       prompt: [{ text: prompt }, { media: { url, contentType: 'video/mp4' } }],
     });
     return text;
@@ -1112,7 +1112,7 @@ async function saveWaveFile(
 
 ai.defineFlow('googleSearch', async (thing) => {
   const { text } = await ai.generate({
-    model: googleAI.model('gemini-2.0-flash'),
+    model: googleAI.model('gemini-2.5-flash'),
     prompt: `What is a banana?`,
     config: { tools: [{ googleSearch: {} }] },
   });
@@ -1122,7 +1122,7 @@ ai.defineFlow('googleSearch', async (thing) => {
 
 ai.defineFlow('googleSearchRetrieval', async (thing) => {
   const { text } = await ai.generate({
-    model: vertexAI.model('gemini-2.0-flash'),
+    model: vertexAI.model('gemini-2.5-flash'),
     prompt: `What is a banana?`,
     config: { googleSearchRetrieval: {} },
   });
@@ -1144,7 +1144,7 @@ ai.defineFlow('googleai-imagen', async (thing) => {
 
 ai.defineFlow('meme-of-the-day', async () => {
   const { text: script } = await ai.generate({
-    model: googleAI.model('gemini-2.0-flash'),
+    model: googleAI.model('gemini-2.5-flash'),
     prompt:
       'Write a detailed script for a 8 second video. The video should be a meme of the day. ' +
       'A Silly DIY FAIL situation like a: broken tools, or bad weather or crooked assembly, etc. Be creative. The FAIL should be very obvious. ' +
@@ -1266,7 +1266,7 @@ ai.defineResource(
 
 ai.defineFlow('resource', async () => {
   return await ai.generate({
-    model: googleAI.model('gemini-2.0-flash'),
+    model: googleAI.model('gemini-2.5-flash'),
     prompt: [
       { text: 'analyze this: ' },
       { resource: { uri: 'my://resource/value' } },
diff --git a/js/testapps/format-tester/src/index.ts b/js/testapps/format-tester/src/index.ts
index 1178cf4d38..ec2d16a325 100644
--- a/js/testapps/format-tester/src/index.ts
+++ b/js/testapps/format-tester/src/index.ts
@@ -153,7 +153,6 @@ if (!models.length) {
     'vertexai/gemini-2.5-flash',
     'googleai/gemini-2.5-pro',
     'googleai/gemini-2.5-flash',
-    'googleai/gemini-2.0-flash',
   ];
 }
 
diff --git a/js/testapps/multiagents-demo/src/agents/representativeAgent.ts b/js/testapps/multiagents-demo/src/agents/representativeAgent.ts
index bb097b788e..5cdb5f5827 100644
--- a/js/testapps/multiagents-demo/src/agents/representativeAgent.ts
+++ b/js/testapps/multiagents-demo/src/agents/representativeAgent.ts
@@ -20,7 +20,7 @@ import { getStoreInfoTool } from '../tools';
 // Simple agent for providing store information
 export const agent = ai.definePrompt({
   name: 'representativeAgent',
-  model: 'googleai/gemini-2.0-flash',
+  model: 'googleai/gemini-2.5-flash',
   description: 'Representative Agent can provide store info',
   tools: [getStoreInfoTool],
   system: `You are a customer service representative for TechStore Computer Shop.
diff --git a/py/samples/dev-local-vectorstore-hello/src/hello.py b/py/samples/dev-local-vectorstore-hello/src/hello.py
index f79066aee1..9cbb91670f 100644
--- a/py/samples/dev-local-vectorstore-hello/src/hello.py
+++ b/py/samples/dev-local-vectorstore-hello/src/hello.py
@@ -27,7 +27,7 @@
             embedder='vertexai/text-embedding-004',
         ),
     ],
-    model='vertexai/gemini-2.0.',
+    model='vertexai/gemini-2.5-flash',
 )
 
 films = [
diff --git a/py/samples/google-genai-code-execution/src/google-genai-code-execution.py b/py/samples/google-genai-code-execution/src/google-genai-code-execution.py
index 7dd6461c34..4b554a703d 100644
--- a/py/samples/google-genai-code-execution/src/google-genai-code-execution.py
+++ b/py/samples/google-genai-code-execution/src/google-genai-code-execution.py
@@ -27,7 +27,7 @@
 
 ai = Genkit(
     plugins=[GoogleAI()],
-    model=googleai_name('gemini-2.0-flash-exp'),
+    model=googleai_name('gemini-2.5-flash'),
 )
 
 
diff --git a/py/samples/google-genai-hello/src/google_genai_hello.py b/py/samples/google-genai-hello/src/google_genai_hello.py
index 89cd25bdb4..5a56a82967 100644
--- a/py/samples/google-genai-hello/src/google_genai_hello.py
+++ b/py/samples/google-genai-hello/src/google_genai_hello.py
@@ -82,7 +82,7 @@
             ])
         ),
     ],
-    model='googleai/gemini-2.5-flash-preview-04-17',
+    model='googleai/gemini-2.5-flash',
 )
 
 
@@ -116,7 +116,7 @@ async def simple_generate_with_tools_flow(value: int, ctx: ActionRunContext) ->
         The generated response with a function.
     """
     response = await ai.generate(
-        model='googleai/gemini-2.0-flash',
+        model='googleai/gemini-2.5-flash',
         prompt=f'what is a gablorken of {value}',
         tools=['gablorkenTool'],
         on_chunk=ctx.send_chunk,
@@ -149,7 +149,7 @@ async def simple_generate_with_interrupts(value: int) -> str:
         The generated response with a function.
     """
     response1 = await ai.generate(
-        model='googleai/gemini-2.0-flash',
+        model='googleai/gemini-2.5-flash',
         messages=[
             Message(
                 role=Role.USER,
@@ -164,7 +164,7 @@ async def simple_generate_with_interrupts(value: int) -> str:
 
     tr = tool_response(response1.interrupts[0], 178)
     response = await ai.generate(
-        model='googleai/gemini-2.0-flash',
+        model='googleai/gemini-2.5-flash',
         messages=response1.messages,
         tool_responses=[tr],
         tools=['gablorkenTool'],
diff --git a/py/samples/google-genai-image/src/google_genai_image.py b/py/samples/google-genai-image/src/google_genai_image.py
index 1463c8fa40..05f6dbbb08 100644
--- a/py/samples/google-genai-image/src/google_genai_image.py
+++ b/py/samples/google-genai-image/src/google_genai_image.py
@@ -40,7 +40,7 @@ async def draw_image_with_gemini() -> str:
     return await ai.generate(
         prompt='Draw a cat in a hat.',
         config={'response_modalities': ['Text', 'Image']},
-        model=googleai_name('gemini-2.0-flash-exp'),
+        model=googleai_name('gemini-2.5-flash'),
     )
 
 
@@ -64,7 +64,7 @@ async def describe_image_with_gemini(data: str) -> str:
                 ],
             ),
         ],
-        model=googleai_name('gemini-2.5-pro-preview-03-25'),
+        model=googleai_name('gemini-2.5-flash'),
     )
     return result.text
 
diff --git a/py/samples/google-genai-vertexai-hello/src/google_genai_vertexai_hello.py b/py/samples/google-genai-vertexai-hello/src/google_genai_vertexai_hello.py
index 69056a69d7..f73041ee76 100644
--- a/py/samples/google-genai-vertexai-hello/src/google_genai_vertexai_hello.py
+++ b/py/samples/google-genai-vertexai-hello/src/google_genai_vertexai_hello.py
@@ -61,7 +61,7 @@
 
 ai = Genkit(
     plugins=[VertexAI()],
-    model='vertexai/gemini-2.0-flash',
+    model='vertexai/gemini-2.5-flash',
 )
 
 
diff --git a/py/samples/short-n-long/src/short_n_long/main.py b/py/samples/short-n-long/src/short_n_long/main.py
index ffff843c1b..9179d0bed2 100644
--- a/py/samples/short-n-long/src/short_n_long/main.py
+++ b/py/samples/short-n-long/src/short_n_long/main.py
@@ -69,7 +69,7 @@
 
 ai = Genkit(
     plugins=[GoogleAI()],
-    model=googleai_name('gemini-2.0-flash-exp'),
+    model=googleai_name('gemini-2.5-flash'),
 )