---
title: "Codex"
description: "Use OpenAI Codex as a sandbox agent."
---

## Usage

```typescript
const session = await client.createSession({
  agent: "codex",
});
```

## Capabilities

| Category | Values |
|----------|--------|
| **Models** | `gpt-5.3-codex` (default), `gpt-5.3-codex-spark`, `gpt-5.2-codex`, `gpt-5.1-codex-max`, `gpt-5.2`, `gpt-5.1-codex-mini` |
| **Modes** | `read-only` (default), `auto`, `full-access` |
| **Thought levels** | `low`, `medium`, `high` (default), `xhigh` |