docs

content/providers/01-ai-sdk-providers/11-google-vertex.mdx

@@ -111,6 +111,17 @@ const model = vertex('gemini-1.5-pro', {
 
 The following optional settings are available for Google Vertex models:
 
+- **structuredOutputs** _boolean_
+
+  Optional. Enable structured output. Default is true.
+
+  This is useful when the JSON Schema contains elements that are
+  not supported by the OpenAPI schema version that
+  Google Vertex uses. You can use this to disable
+  structured outputs if you need to.
+
+  See [Troubleshooting: Schema Limitations](#troubleshooting-schema-limitations) for more details.
+
 - **safetySettings** _Array\<\{ category: string; threshold: string \}\>_
 
   Optional. Safety settings for the model.
@@ -207,14 +218,46 @@ const { text } = await generateText({
 });
 ```
 
+### Troubleshooting: Schema Limitations
+
+The Google Vertex API uses a subset of the OpenAPI 3.0 schema,
+which does not support features such as unions.
+The errors that you get in this case look like this:
+
+`GenerateContentRequest.generation_config.response_schema.properties[occupation].type: must be specified`
+
+By default, structured outputs are enabled (and for tool calling they are required).
+You can disable structured outputs for object generation as a workaround:
+
+```ts highlight="3,8"
+const result = await generateObject({
+  model: vertex('gemini-1.5-pro', {
+    structuredOutputs: false,
+  }),
+  schema: z.object({
+    name: z.string(),
+    age: z.number(),
+    contact: z.union([
+      z.object({
+        type: z.literal('email'),
+        value: z.string(),
+      }),
+      z.object({
+        type: z.literal('phone'),
+        value: z.string(),
+      }),
+    ]),
+  }),
+  prompt: 'Generate an example person for testing.',
+});
+```
+
 ### Model Capabilities
 
-| Model                   | Image Input         | Object Generation   | Tool Usage          | Tool Streaming      |
-| ----------------------- | ------------------- | ------------------- | ------------------- | ------------------- |
-| `gemini-1.5-flash`      | <Check size={18} /> | <Check size={18} /> | <Check size={18} /> | <Check size={18} /> |
-| `gemini-1.5-pro`        | <Check size={18} /> | <Check size={18} /> | <Check size={18} /> | <Check size={18} /> |
-| `gemini-1.0-pro-vision` | <Check size={18} /> | <Check size={18} /> | <Cross size={18} /> | <Cross size={18} /> |
-| `gemini-1.0-pro`        | <Cross size={18} /> | <Check size={18} /> | <Cross size={18} /> | <Cross size={18} /> |
+| Model              | Image Input         | Object Generation   | Tool Usage          | Tool Streaming      |
+| ------------------ | ------------------- | ------------------- | ------------------- | ------------------- |
+| `gemini-1.5-flash` | <Check size={18} /> | <Check size={18} /> | <Check size={18} /> | <Check size={18} /> |
+| `gemini-1.5-pro`   | <Check size={18} /> | <Check size={18} /> | <Check size={18} /> | <Check size={18} /> |
 
 <Note>
   The table above lists popular models. You can also pass any available provider