Models & tools
Previewing Ultrafast mode: GPT-5.6 Sol at up to 14X the speed
Publisher preview
A new speed class for frontier intelligence, turning speed into a competitive advantage. Today, we’re sharing an early look at Ultrafast, a new service tier that runs GPT‑5.6 Sol up to 14× faster than Standard processing, launching first in the OpenAI API. Powered by Cerebras, Ultrafast generates up to 750 output tokens per second, bringing our most intelligent model at the time of this announcement to products and workflows where every second matters. With GPT‑5.6, we’re pushing the frontier on what our models can do and making them more efficient…






