Artificial intelligence is entering the era of self-improvement. On Thursday afternoon, OpenAI released a new cutting-edge coding model that the company said assisted in its own creation.

Codex, OpenAI’s AI-powered software engineering agent that can work on tasks in parallel, is now generally available. Since being launched as a research preview in May, Codex has added Slack ...

GPT-5.3-Codex helped debug and deploy parts of itself. Codex can be steered mid-task without losing context. "Underspecified" prompts now produce richer, more usable results. OpenAI today announced ...