The new model is build to accelerate the capabilities of Codex, the agentic coding tool OpenAI launched earlier this week.

OpenAI has a published Preparedness Framework, which it uses for measuring and protecting against severe harm from frontier AI capabilities. In the blog post announcing GPT-5.3-Codex, the company says ...

GitHub has added Claude and OpenAI Codex as native AI coding agents that work directly in repos, issues, and pull requests.

Microsoft enhances Visual Studio 2026 with AI reliability upgrades, better failure handling, and agentic workflows for ...