OpenAI And Cerebras Launch Ultrafast Mode, GPT-5.6 Sol At 750 Tokens/Sec
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OpenAI And Cerebras Launch Ultrafast Mode, GPT-5.6 Sol At 750 Tokens/Sec
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Summary Report
OpenAI and Cerebras' Ultrafast mode runs GPT-5.6 Sol at up to 750 tokens per second, roughly 14x faster than standard processing, with no drop in intelligence.
- 01. On Humanity's Last Exam, GPT-5.6 Sol on Ultrafast finished all 2,500 questions in just over 11 hours, versus roughly 78 hours for Claude Fable 5
- 02. In a head-to-head build test, Ultrafast finished in under two minutes against twelve minutes on Standard, with the same result both times
OpenAI and Cerebras have launched Ultrafast mode for GPT-5.6 Sol, a new tier that runs the full model at up to 750 tokens per second, roughly 14 times faster than standard processing, without any drop in the model's underlying intelligence. It's launching first to a select group of OpenAI API customers.
