OpenAI Blog · Aug 13, 2026 10:00 UTC

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

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

Summary

Preview Ultrafast, a new OpenAI API service tier that runs GPT-5.6 Sol up to 14× faster. Powered by Cerebras, it delivers up to 750 output tokens per second.

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