Catalog
OpenAI
OpenAI Codex
Agent that edits real codebases from ChatGPT
Overview
- Main purpose
- Hands-on software and website updates in a working tree
- Context window
- Inherits the selected GPT-5.6 model — not a separate published window
- API pricing
- Included with ChatGPT / Codex plans; API usage follows GPT-5.6 rates
- Access
- ChatGPT desktop (Codex mode), Codex product, OpenAI API
Capabilities
Tags
Catalog tags plus any you add. There is no limit.
- website
- agent
- refactor
- codex
Unlimited tags. Press Enter or comma to add another — catalog tags stay, yours can be removed.
Key features
- Integrated into the ChatGPT desktop app in the GPT-5.6 era (OpenAI)
- Works against real repositories
- Uses the GPT-5.6 family rather than a separate frozen SKU
Notes
- OpenAI describes GPT-5.6 Sol as its best coding model yet and ships Codex as the agent surface for editing real codebases, including from the ChatGPT desktop app.
Limitations
- Codex is a product/agent, not a model with its own context window or unique token price.
- Results depend on which GPT-5.6 tier is selected.
Product overview. Codex is a coding-agent surface powered by GPT-5.6 models, not a separate model card with frozen specs.
Vendor source