diff --git a/packages/lib/server-only/ai/envelope/detect-fields/index.ts b/packages/lib/server-only/ai/envelope/detect-fields/index.ts
index da85cd571..f4b65300f 100644
--- a/packages/lib/server-only/ai/envelope/detect-fields/index.ts
+++ b/packages/lib/server-only/ai/envelope/detect-fields/index.ts
@@ -286,7 +286,7 @@ const detectFieldsFromPage = async ({
   });
 
   const result = await generateObject({
-    model: vertex('gemini-3-pro-preview'),
+    model: vertex('gemini-3-flash-preview'),
     system: SYSTEM_PROMPT,
     schema: ZSubmitDetectedFieldsInputSchema,
     messages,
diff --git a/packages/lib/server-only/ai/envelope/detect-recipients/index.ts b/packages/lib/server-only/ai/envelope/detect-recipients/index.ts
index 0544b729f..d59fb7f17 100644
--- a/packages/lib/server-only/ai/envelope/detect-recipients/index.ts
+++ b/packages/lib/server-only/ai/envelope/detect-recipients/index.ts
@@ -207,7 +207,7 @@ const detectRecipientsFromImages = async ({
     });
 
     const result = await generateObject({
-      model: vertex('gemini-2.5-flash'),
+      model: vertex('gemini-3-flash-preview'),
       system: SYSTEM_PROMPT,
       schema: ZDetectedRecipientsSchema,
       messages,