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News/GPT-5.3-Codex System Card
openai
PublishedFebruary 5, 2026 at 12:00 AM

GPT-5.3-Codex System Card

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GPT‑5.3-Codex is the most capable agentic coding model to date, combining the frontier coding performance of GPT‑5.2-Codex with the reasoning and professional knowledge capabilities of GPT‑5.2.

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