SITUATION EXPLAINED: OpenAI Sol Ultrafast cleared Humanity's Last Exam in 11 hours. Fable took 3 days. • Sol Ultrafast runs at up to 750 output tokens per second, 14x standard, powered by Cerebras • It cleared Humanity's Last Exam in 11 hours & 11 minutes. Fable 5 took more than 3 days • Same model, same intelligence, just a different service tier • Limited preview only, and pricing isn't public @theojaffee: "This is really useful for cybersecurity applications. And probably something like…

OpenAI@OpenAIAug 13

Previewing Ultrafast mode: GPT-5.6 Sol at up to 14x the speed. Launching first in the OpenAI API to a select group of customers with expanded access to more businesses as capacity grows.