When it was teased this morning, I didn’t expect GPT-5.5 to actually ship today. Sounds like it’s a very good, efficient model:

Across these domains, GPT‑5.5 is not just more intelligent; it is more efficient in how it works through problems, often reaching higher-quality outputs with fewer tokens and fewer retries. On Artificial Analysis’s Coding Index, GPT‑5.5 delivers state-of-the-art…