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GPT-5.3-Codex

OpenAIProprietary

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GPT-5.3-Codex is OpenAI’s most advanced agentic coding model, combining the frontier software engineering performance of GPT-5.2-Codex with the broader reasoning and professional knowledge capabilities of GPT-5.2. It achieves state-of-the-art results...

Context: 400K tokensReleased: Feb 24, 20260 up · 0 down

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