# Set model routes

> Replace a workspace's model routes.

<div class="g1t-endpoint"><span class="g1t-method" data-method="put">PUT</span><code>/workspaces/{workspace}/model-routes</code></div>

Each route names a task (default, implement, review, plan or update), a connection_id (null for g1t's hosted models) and a model at that provider. Providers that speak OpenAI's API need a model. Owners only.

The response is the routes as saved, ordered by task.

- **Authentication:** Required. Send an [access token](/reference/api/#authentication) as `Authorization: Bearer`.
- **MCP tool:** [`workspace`](/reference/mcp/#workspace) with `action` `set_model_routes`, and the same inputs
- **Scope:** An access token needs [`workspace:admin`](/guides/authentication/#scopes).

## Path parameters

| Name | Type | Required | Description |
| --- | --- | --- | --- |
| `workspace` | string | Yes | The workspace's slug, e.g. "flagon-io". |

## Body parameters

Send a JSON object. Names are `snake_case`, as in responses; the `camelCase` spelling is accepted too.

| Name | Type | Required | Description |
| --- | --- | --- | --- |
| `routes` | array of objects | Yes |  |
| `routes[].task` | string | Yes | One of `default`, `implement`, `review`, `plan`, `update`. |
| `routes[].connection_id` | string or null | No | A model integration's id, or null for g1t's hosted models. |
| `routes[].model` | string or null | No | The model at that provider. |

## Example request

```sh
curl -X PUT https://api.g1t.sh/workspaces/flagon-io/model-routes \
  -H "Authorization: Bearer $G1T_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "routes": [
      {
        "task": "default",
        "connection_id": "con_01kpx3m7q2f8r9t4v6w0y1z2ab",
        "model": "claude-sonnet-4-5"
      },
      {
        "task": "review",
        "connection_id": null
      }
    ]
  }'
```

## Example response

A successful request answers `200` with:

```json
[
  {
    "task": "default",
    "connection_id": "con_01kpx3m7q2f8r9t4v6w0y1z2ab",
    "model": "claude-sonnet-4-5"
  },
  {
    "task": "review",
    "connection_id": null,
    "model": null
  }
]
```

## Errors

A failed request answers with one of these statuses and a body like `{"error": {"code": "not_found", "message": "Repository not found."}}`. See [errors](/reference/api/#errors).

| Status | Code | When |
| --- | --- | --- |
| 401 | `unauthenticated` | A token is required, or the one sent is not valid. |
| 403 | `forbidden` | The token is valid but not allowed to do this, such as a member-only change or an agent token outside its repository. |
| 404 | `not_found` | It does not exist, or you cannot see it. |
| 409 | `conflict` | The request conflicts with the current state. |
| 422 | `invalid` | The input is not valid. `message` says which field and why. |