Introducing GPT-5.3-Codex

Published: (February 4, 2026 at 07:00 PM EST)
1 min read
Source: OpenAI Blog

Source: OpenAI Blog

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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