OpenAI announces GPT-5.3-Codex, described as the most capable agentic coding model to date, combining the coding performance of GPT-5.2-Codex with the reasoning and knowledge capabilities of GPT-5.2.
OpenAI introduced GPT-5.3-Codex, a Codex-native agent that combines frontier coding performance with general reasoning for long-horizon, real-world technical work.
Coverage
No coverage resolved onto GPT-5.3-Codex’s posts in this window.