Model Releases
/ultrafast
OpenAI announced the “Ultrafast” mode (GPT‑5.6 Sol), which can deliver responses up to 14× faster than standard API calls. The feature will first be released to a limited group of API users, with expa
OpenAI announced the “Ultrafast” mode (GPT‑5.6 Sol), which can deliver responses up to 14× faster than standard API calls. The feature will first be released to a limited group of API users, with expanded access planned as system capacity grows. The preview was posted by Sam Altman on 16 May.
Source: Sam Altman (X) | 2026-08-14