> ## Documentation Index
> Fetch the complete documentation index at: https://docs.collinear.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Test Model Configuration

> Validate a model configuration with a test completion

**Base URL:** `https://rl-gym-api.collinear.ai`

Validate a model configuration by sending a test completion request.

```
POST /test-model-config
```

**Request body:** A `ModelConfig` object (same schema as in [Launch Runs](/api-reference/runs#modelconfig)).

**Response:** `200 OK`

```json theme={null}
{
  "success": true,
  "message": "Model responded successfully",
  "error_type": null
}
```

| Field        | Type     | Description                                                                                                                             |
| ------------ | -------- | --------------------------------------------------------------------------------------------------------------------------------------- |
| `success`    | `bool`   | Whether the test completion succeeded                                                                                                   |
| `message`    | `string` | Human-readable result summary or error description                                                                                      |
| `error_type` | `string` | Error classification: `authentication_error`, `connection_error`, `timeout`, `invalid_model`, `rate_limit`, `bad_request`, or `unknown` |