The Deploy Log | Models and APIs
GPT-5.3 Instant
GPT-5.3 Instant is released as an update to ChatGPT's most-used model, reducing unnecessary refusals and improving web answer synthesis.
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.