GPT-5.5 is here! Available in Codex and ChatGPT today

x.com

Sam Altman

@sama

API pricing will be $5 per 1 million input tokens and $30 per 1 million output tokens, with a 1 million context window. (Remember, you will need less tokens per task than 5.4!)

6:16 PM - 23 Apr 2026 900 27