Overview
A Codex model extending agentic coding into research, tool use, and end-to-end computer work.
GPT-5.3-Codex
A Codex model extending agentic coding into research, tool use, and end-to-end computer work.
MODEL NUMBER037
- Release date
- 2026-02-05
- Organization
- OpenAI
- Family
- GPT
01
Specifications
Only published specifications are shown.
02
Overview
PreviousGPT-5.2-Codex— · — ctx
CurrentGPT-5.3-Codex— · 400K ctx
New capabilities Computer use Tool use
04
Architecture & capabilities
Key capabilities
Long-horizon agentCodingComputer useTool use
05
Release history
GPT-5.3-Codex launched across Codex products.
View source06
Related models
Select a card to view the related model.
07