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AI summary
Written by AI from the official notes. Check them for exact details.GPT-5.3-Codex is now available in Cursor and VS Code, with phased API access starting.
- GPT-5.3-Codex available natively in Cursor and VS Code.
- API access begins with a small set of customers.
- First model under the Preparedness Framework for high security.
- Safety controls will scale with API access expansion.
Why it matters: Developers using Cursor and VS Code should be aware of this new model for enhanced coding capabilities.
Full release notes
Starting today, GPT-5.3-Codex is available natively in Cursor and VS Code.
API access is starting with a small set of customers as part of a phased release.
This is the first model treated as a high security capability under the Preparedness Framework.
Safety controls will continue to scale, and API access will expand over the next few weeks.