With GPT-5.3-Codex, OpenAI pitches Codex for more than just writing code
Summary
OpenAI releases GPT-5.3-Codex, a new Codex with multi-channel access and end-to-end lifecycle capabilities. It outperforms prior Codex on select benchmarks, but API access remains unavailable for now; OpenAI emphasizes mid-task steering and frequent progress updates, while cautioning that autonomous operation is not claimed.