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

OpenAI previews Ultrafast, an API service tier running GPT-5.6 Sol up to 14x faster via Cerebras at up to 750 output tokens per second.

OpenAI announced a preview of Ultrafast, a new API service tier that runs GPT-5.6 Sol at up to 14 times the speed of standard inference. The tier is powered by Cerebras hardware and delivers up to 750 output tokens per second. The offering targets latency-sensitive developer workloads on OpenAI's API platform.

OpenAI News · Aug 13, 2026AI tools & infra

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ai model GPT-5.6 Sol 1organization Cerebras 1organization OpenAI 1product GPT-5.6 Sol 1vendor Cerebras 1vendor OpenAI 1
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