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

# GPT-5.6

> Call the gpt-5.6 text route through SnapGen.

`gpt-5.6` is the standard GPT-5.6 route. It supports the same four text protocol surfaces as the rest of the live GPT catalog.

| Property     | Value                         |
| ------------ | ----------------------------- |
| Model ID     | `gpt-5.6`                     |
| Input price  | \$1.75 per 1M tokens          |
| Output price | \$14.00 per 1M tokens         |
| Streaming    | Supported with `stream: true` |

<ParamField body="model" type="string" required>
  Set to `gpt-5.6`.
</ParamField>

<ParamField body="messages" type="array" required>
  Ordered system, user, and assistant messages.
</ParamField>

<ParamField body="stream" type="boolean" default="false">
  Set to `true` to receive server-sent events.
</ParamField>

## Request

```bash theme={null}
curl https://api.snapgen.org/v1/chat/completions \
  -H "Authorization: Bearer $SNAPGEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-5.6",
    "messages": [{"role": "user", "content": "Design a retry policy for an asynchronous media API."}]
  }'
```

Read generated text from `choices[0].message.content`. See [Chat Completions protocol](/api-reference/chat-completions) for streaming and response fields.

## Compatible protocol paths

| Format             | Path                                     |
| ------------------ | ---------------------------------------- |
| Chat Completions   | `/v1/chat/completions`                   |
| Responses          | `/v1/responses`                          |
| Anthropic Messages | `/v1/messages`                           |
| Gemini native      | `/v1beta/models/gpt-5.6:generateContent` |

<Note>
  Use the exact model ID shown here. `gpt-5.6`, `gpt-5.6-luna`,
  `gpt-5.6-sol`, and `gpt-5.6-terra` are separate billable routes.
</Note>