OpenAI rolls out GPT‑5 Codex: New coding abilities, availability, and who can use it

OpenAI has unveiled GPT‑5 Codex, a new version of its AI designed specifically for software development. The model is built to help developers write, debug, and review code more efficiently, working both interactively with humans and independently on complex tasks.

Speaking of the new Codex capabilities, OpenAI CEO Sam Altman tweeted on Tuesday, “GPT-5-Codex already ~40% of traffic for codex! should be the majority some time today.”