GPT-5.6 Sol Ultrafast

GPT-5.6 Sol on Ultrafast mode runs up to 14x faster than Standard processing and generates up to 750 output tokens per second, launching first in the OpenAI API and powered by Cerebras.

OpenAI | In Edition 47, Saturday 15 Aug 2026

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

Added to The Deploy Log Tuesday 15 Sep 2026, updated Thursday 17 Sep 2026. Read Edition 47, the edition that carried it.

The call on this one

What shipped is free. The call on it, what to do about it and the condition on that, opens with a signup: free, no card, every edition in full.

It becomes $50 a year, and signing up now keeps your first year free.