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

# GPT-5.2 Codex

> OpenAI GPT-5.2 Codex — code-optimized version of GPT-5.2.

GPT-5.2 Codex is available through Starrise AI via OpenAI Responses API (`/v1/responses`).

## Key Capabilities

* **Responses API** — Uses the new `/v1/responses` endpoint, replacing `messages` with `input`
* **Reasoning control** — Configurable reasoning effort (minimal / low / medium / high) and summary
* **Verbosity control** — Set response verbosity to low, medium, or high
* **Streaming** — Real-time token streaming via SSE
* **Tool calling** — Supports function calling and tool use

## Quick Example

<CodeGroup>
  ```bash cURL theme={null}
  curl https://ai.alad.com/v1/responses \
    -H "Authorization: Bearer YOUR_API_KEY" \
    -H "Content-Type: application/json" \
    -d '{
      "model": "gpt-5.2-codex",
      "input": [
        { "role": "user", "content": "Explain quantum entanglement in simple terms." }
      ],
      "reasoning": {
        "effort": "high",
        "summary": "auto"
      },
      "text": {
        "format": { "type": "text" },
        "verbosity": "medium"
      },
      "store": true
    }'
  ```

  ```python Python theme={null}
  from openai import OpenAI

  client = OpenAI(
      api_key="YOUR_API_KEY",
      base_url="https://ai.alad.com/v1"
  )

  response = client.responses.create(
      model="gpt-5.2-codex",
      input=[
          {"role": "user", "content": "Explain quantum entanglement in simple terms."}
      ],
      reasoning={"effort": "high", "summary": "auto"},
      text={"format": {"type": "text"}, "verbosity": "medium"},
      store=True
  )

  print(response.output[0].content[0].text)
  ```

  ```python Streaming theme={null}
  from openai import OpenAI

  client = OpenAI(
      api_key="YOUR_API_KEY",
      base_url="https://ai.alad.com/v1"
  )

  stream = client.responses.create(
      model="gpt-5.2-codex",
      input=[
          {"role": "user", "content": "Write a short poem about the ocean."}
      ],
      stream=True
  )

  for event in stream:
      if hasattr(event, 'delta'):
          print(event.delta, end="")
  ```
</CodeGroup>

## Parameters

| Parameter           | Type           | Required | Description                                                    |
| ------------------- | -------------- | -------- | -------------------------------------------------------------- |
| `model`             | string         | Yes      | Fixed value: `gpt-5.2-codex`                                   |
| `input`             | array          | Yes      | Array of `{ role, content }` objects                           |
| `stream`            | boolean        | No       | Enable SSE streaming, default `false`                          |
| `temperature`       | float          | No       | `0`–`2`, controls randomness, default `1`                      |
| `top_p`             | float          | No       | Nucleus sampling threshold, default `1`                        |
| `max_output_tokens` | integer        | No       | Maximum output tokens                                          |
| `stop`              | string / array | No       | Sequences where generation stops                               |
| `reasoning`         | object         | No       | `{ effort, summary }` — Controls reasoning depth               |
| `text`              | object         | No       | `{ format, verbosity }` — Controls output format and verbosity |
| `tools`             | array          | No       | List of tools the model can call                               |
| `store`             | boolean        | No       | Store response for later retrieval, default `true`             |

<Card title="API Reference" icon="code" href="/en/api-reference/model-api/openai/gpt-5-2-codex">
  View the interactive API Playground for GPT-5.2 Codex.
</Card>