tech
February 5, 2026
OpenAI launches new agentic coding model only minutes after Anthropic drops its own
The new model is build to accelerate the capabilities of Codex, the agentic coding tool OpenAI launched earlier this week.
TL;DR
- OpenAI launched GPT-5.3 Codex, a new model designed to enhance its agentic coding tool, Codex.
- The new model transforms Codex from a code writing/reviewing tool to one capable of performing nearly any task developers do on a computer.
- OpenAI claims GPT-5.3 Codex can create complex games and apps from scratch over several days.
- The model is 25% faster than its previous version (GPT-5.2).
- GPT-5.3 Codex was the first OpenAI model instrumental in its own creation through self-debugging and evaluation.
- This release follows closely behind a similar agentic coding model from competitor Anthropic, with both companies originally planning simultaneous releases.
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