Cerebras chips power OpenAI Ultrafast
Published: August 13, 2026 — Temperature2
Technical summary of Ultrafast: 750 tok/s, 14× standard, limited preview waitlist. Reiterates HLE (~11h11m vs Fable 5 ~78h27m) and GDP-Val 5.6× claims. Frames inference silicon race (Cerebras, Groq, Together) vs Nvidia training dominance.