---
title: "Changes to Invoke a model with routing"
method: POST
path: "/v1/model-router/invoke"
---

# Changes to Invoke a model with routing

`POST /v1/model-router/invoke`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 1 of 3 revisions.

- **2026-08-12** `5a5597ebb2d6`: 2 breaking, 1 warning, 9 info

## Changes

- **2026-08-12** `5a5597ebb2d6`: 2 breaking, 1 warning, 9 info
  - request property `messages/items/role` was restricted to a list of enum values
  - the `messages` request property's minItems was increased to `1`
  - removed the optional property `tool_calls` from the response with the `200` status
  - added the new `assistant` enum value to the request property `messages/items/role`
  - added the new `system` enum value to the request property `messages/items/role`
  - added the new `user` enum value to the request property `messages/items/role`
  - added the optional property `cache_cost_usd` to the response with the `200` status
  - added the optional property `retry_after` to the response with the `400` status
  - added the optional property `retry_after` to the response with the `401` status
  - added the optional property `retryable` to the response with the `400` status
  - added the optional property `retryable` to the response with the `401` status
  - removed the `pydantic_tools` enum value from the `execution_engine` response property for the response status `200`

---

[Operation](https://skmtc.dev/oneloop-hq/apis/feather-api/docs/v1/model-router/invoke/post.md) - [API](https://skmtc.dev/oneloop-hq/apis/feather-api.md) - [Page](https://skmtc.dev/oneloop-hq/apis/feather-api/changes/v1/model-router/invoke/post)