GPT-5.3-Codex
GPT-5.3-Codex is available with paid ChatGPT plans everywhere Codex runs: the app, CLI, IDE extension, and web. It sets a new industry high on SWE-Bench Pro and Terminal-Bench, runs 25% faster, and matches GPT-5.2 on GDPval.
The call on this one
What shipped is free. The call on it, what to do about it and the condition on that, opens with a signup: free, no card, every edition in full.
It becomes $50 a year, and signing up now keeps your first year free.