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GPT-5.3-Codex System Card — forck.live

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OpenAI· GPT / ChatGPT / API

GPT-5.3-Codex System Card

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.

Visit source ↗openai.com

Announced: 05 Feb 2026 00:00 UTC
Detected: 03 Aug 2026 21:11 UTC (+179d after)

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