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

# OpenAI extended-parameters example

> OpenAI provider-specific passthrough example.

## When to use this

* The unified request model is not enough
* You need controlled passthrough for OpenAI-specific controls

## Example

```json theme={null}
{
  "model": "gpt-5",
  "messages": [
    { "role": "user", "content": "Summarize this report." }
  ],
  "model_extra": {
    "reasoning": { "effort": "medium" },
    "metadata": { "trace_id": "report-123" }
  }
}
```

## cURL example

```bash theme={null}
curl https://api-vip.apigo.ai/v1/chat/completions \
  -H "Authorization: Bearer $YOUR API KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-5",
    "messages": [
      { "role": "user", "content": "Summarize this report." }
    ],
    "model_extra": {
      "reasoning": { "effort": "medium" },
      "metadata": { "trace_id": "report-123" }
    }
  }'
```

## Python example

```python theme={null}
import requests

response = requests.post(
    "https://api-vip.apigo.ai/v1/chat/completions",
    headers={
        "Authorization": "Bearer <YOUR API KEY>",
        "Content-Type": "application/json",
    },
    json={
        "model": "gpt-5",
        "messages": [
            {"role": "user", "content": "Summarize this report."}
        ],
        "model_extra": {
            "reasoning": {"effort": "medium"},
            "metadata": {"trace_id": "report-123"},
        },
    },
)

print(response.json())
```

## Node.js example

```js theme={null}
const response = await fetch("https://api-vip.apigo.ai/v1/chat/completions", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.YOUR API KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    model: "gpt-5",
    messages: [
      { role: "user", content: "Summarize this report." }
    ],
    model_extra: {
      reasoning: { effort: "medium" },
      metadata: { trace_id: "report-123" }
    }
  }),
});

console.log(await response.json());
```

## Best practices

* Only allowlisted extension fields should be forwarded
* Log model version together with passthrough parameters