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Models2026-08-14 · source-backed
Announced August 13, up to 14x Standard processing, 11x faster than Claude Fable 5, 5x faster than Opus 4.8 on Fast mode, running on the Cerebras Wafer-Scale Engine with 44 GB of on-chip SRAM per wafer. Limited API preview for select customers with capacity-gated expansion. The concrete number from Cerebras: all 2,500 Humanity's Last Exam questions in 11 hours 11 minutes versus 78+ hours for Claude Fable 5, plus 5.6x end-to-end on GDP-Val with no measured degradation. For long agentic eval sweeps, that reframes inference speed as an experiment-iteration variable, not a UX nicety.
Each link below shares sources, entities, or timing with this story.
Cerebras partners with OpenAI / Shared entities / Same source domain / Shared topic / Earlier coverage
Linked by a graph relationship (Cerebras partners with OpenAI); both cover Claude Fable, GPT, Last Exam, OpenAI; reported by the same outlet (openai.com).
Cerebras partners with OpenAI / Shared entities / Same source domain / Earlier coverage / Tension
Linked by a graph relationship (Cerebras partners with OpenAI); both cover Fast, GPT, OpenAI, Opus; reported by the same outlet (openai.com).
Cerebras partners with OpenAI / Shared entities / Same source domain / Earlier coverage
Linked by a graph relationship (Cerebras partners with OpenAI); both cover GPT, OpenAI, Opus, Standard; reported by the same outlet (openai.com).
Cerebras partners with OpenAI / Shared entities / Same source domain / Shared topic / Earlier coverage
Linked by a graph relationship (Cerebras partners with OpenAI); both cover Claude Fable, GPT, OpenAI; reported by the same outlet (openai.com).
Linked by a graph relationship (Cerebras partners with OpenAI); both cover Claude Fable, GPT, OpenAI; reported by the same outlet (openai.com).
OpenAI released Terra / Shared entities / Shared topic / Earlier coverage
Linked by a graph relationship (OpenAI released Terra); both cover Claude Fable, GPT, Opus; overlapping topics (agentic, claude, fable).
Cerebras partners with OpenAI / Shared entities / Shared topic / Earlier coverage
Linked by a graph relationship (Cerebras partners with OpenAI); both cover Claude Fable, GPT, OpenAI; overlapping topics (claude, fable).
Cerebras partners with OpenAI / Shared entities / Same source domain / Earlier coverage
Linked by a graph relationship (Cerebras partners with OpenAI); both cover GPT, OpenAI, Opus; reported by the same outlet (openai.com).