Previewing Ultrafast mode: GPT-5.6 Sol at up to 14X the speed

OpenAI announced a new API service tier called Ultrafast, which runs the GPT-5.6 Sol model up to 14 times faster than standard. The tier, powered by Cerebras, can generate up to 750 output tokens per second.

Summary written by Kernelia from the original article by OpenAI News. The story and its rights belong to its author.