Question 1

How fast is OpenAI's Ultrafast mode?

Accepted Answer

Ultrafast runs GPT-5.6 Sol at up to 750 output tokens per second, which OpenAI and Cerebras say is up to 14 times faster than Standard processing.

Question 2

What hardware powers Ultrafast?

Accepted Answer

Cerebras (NASDAQ: CBRS) powers the tier using its Wafer-Scale Engine, a chip that holds 44 GB of SRAM on-chip so model weights stay local, removing the memory-bandwidth bottleneck that slows inference on GPUs.

Question 3

Who can use Ultrafast right now?

Accepted Answer

It is available only in a limited preview to a select group of OpenAI API customers, and the company says it will expand access as capacity grows.

CBRS

OpenAI gates its fastest GPT-5.6 Sol tier behind a limited preview

One sharp brief.
Every day.

CBRS

OpenAI gates its fastest GPT-5.6 Sol tier behind a limited preview

One sharp brief.Every day.

One sharp brief.
Every day.