# OpenAI — Introducing GPT-5.3-Codex

- Company: OpenAI (openai.com)
- Announced: 2026-02-05T00:00:00+00:00
- Category: new-model
- Subject: GPT / ChatGPT / API
- Models affected: GPT-5.3-Codex
- Source: https://openai.com/index/introducing-gpt-5-3-codex
- Record: https://forck.live/items/281-introducing-gpt-5-3-codex

OpenAI introduced GPT-5.3-Codex, a Codex-native agent that combines frontier coding performance with general reasoning for long-horizon, real-world technical work.

## Evidence

Verbatim from https://openai.com/index/introducing-gpt-5-3-codex:

> GPT-5.3-Codex is a Codex-native agent that pairs frontier coding performance with general reasoning to support long-horizon, real-world technical work.

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Record: https://forck.live/items/281-introducing-gpt-5-3-codex
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