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GPT-5.3-Codex

Free· Artificial Intelligence· Updated 2mo ago

About GPT-5.3-Codex

Launched February 6, 2026

Advances the frontier of coding and computer work. SOTA on SWE-Bench Pro (57%) and OSWorld (64%). Features mid-task steerability (interact while it works), 25% faster speeds, and “High” capabilities in cybersecurity.
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