Model release · 2026-02-05
Text / LLM · OpenAI
GPT-5.3-Codex
A specialized agentic model combined Codex and GPT-5 training for long-running coding work.
Sources
OpenAI · releaseOpen primary source Text / LLM · OpenAI
A specialized agentic model combined Codex and GPT-5 training for long-running coding work.