# GPT-6 Astra · API guide

Use the exact API model ID `gpt-6-astra`. This guide describes the platform contract; check the live catalog before calling the model.

## Request example

The platform origin is filled in at build time. Set API_KEY to your server-side key before running.

```bash
curl "https://newrouters.com/v1/chat/completions" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $API_KEY" \
  --data '{
  "model": "gpt-6-astra",
  "messages": [
    {
      "role": "user",
      "content": "Explain how an HTTP request works in three concise steps."
    }
  ],
  "max_completion_tokens": 1024,
  "stream": false
}'
```

## Protocol and response

This model uses the openai protocol. Read its native response and usage fields; do not wrap the request in the media task input envelope.

Supported endpoint templates：

- `POST /v1/chat/completions`
- `POST /v1/responses`

| Limit | Catalog value |
| --- | --- |
| Context tokens | 1050000 |
| Maximum output tokens | 128000 |

For streaming, use the native protocol streaming option and parse its events; check supported capabilities in the live catalog.








<!-- official-reference:start -->
## Official sources and identity

Checked: 2026-09-27 · Platform model: `gpt-6-astra` · Official reference: `gpt-6-astra`

- [gpt-6-astra official reference](https://developers.openai.com/api/docs/models/gpt-6-astra)
- [OpenAI Responses / Chat Completions](https://developers.openai.com/api/docs/guides/migrate-to-responses)
- [OpenAI streaming](https://developers.openai.com/api/docs/guides/streaming-responses)
<!-- official-reference:end -->

## Pricing and troubleshooting

Check current availability, contract and account pricing before integration. Keep request IDs and usage receipts when diagnosing errors. [Complete API reference](/docs/api)

## Request examples in other languages

### JavaScript

```javascript
const apiBaseUrl = "https://newrouters.com";
const apiKey = process.env.API_KEY;
if (!apiKey) throw new Error("Set API_KEY in your server environment");

const response = await fetch(apiBaseUrl + "/v1/chat/completions", {
  method: "POST",
  headers: {
    "Content-Type": "application/json",
    "Authorization": "Bearer " + apiKey
  },
  body: JSON.stringify({
  "model": "gpt-6-astra",
  "messages": [
    {
      "role": "user",
      "content": "Explain how an HTTP request works in three concise steps."
    }
  ],
  "max_completion_tokens": 1024,
  "stream": false
})
});

const result = await response.json();
if (!response.ok) throw new Error(JSON.stringify(result));
console.log(result);
```

### Python

```python
import json
import os
from urllib.request import Request, urlopen

api_base_url = "https://newrouters.com"
api_key = os.environ["API_KEY"]
body = json.loads("{\"model\":\"gpt-6-astra\",\"messages\":[{\"role\":\"user\",\"content\":\"Explain how an HTTP request works in three concise steps.\"}],\"max_completion_tokens\":1024,\"stream\":false}")

request = Request(
    api_base_url + "/v1/chat/completions",
    data=json.dumps(body).encode("utf-8"),
    headers={
    "Content-Type": "application/json",
    "Authorization": "Bearer " + api_key
    },
    method="POST",
)
with urlopen(request) as response:
    print(json.load(response))
```

## Response fields (illustrative values)

### HTTP 200

```json
{
  "choices": [
    {
      "index": 0,
      "message": {
        "role": "assistant",
        "content": "..."
      },
      "finish_reason": "stop"
    }
  ]
}
```