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

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Merged summary

TL;DR - OpenAI previewed Ultrafast, an API service tier that runs GPT-5.6 Sol up to 14Ă— faster. Powered by Cerebras, it targets latency-sensitive applications with output speeds up to 750 tokens per second.

  • Supports GPT-5.6 Sol through the OpenAI API.
  • Delivers up to 750 output tokens per second.
  • Advertises speed improvements of up to 14Ă—.
  • Uses Cerebras infrastructure for accelerated inference.

Sources (1)

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

OpenAI 2026-08-13
Public signals N/A
Providers: Hugging Face · N/A OpenAlex · N/A Publisher · N/A Semantic Scholar · N/A X · N/A Fetched 2026-09-13 14:11:39.283887 UTC

TL;DR - OpenAI previewed Ultrafast, an API service tier that runs GPT-5.6 Sol up to 14Ă— faster. Powered by Cerebras, it targets latency-sensitive applications with output speeds up to 750 tokens per second.

  • Supports GPT-5.6 Sol through the OpenAI API.
  • Delivers up to 750 output tokens per second.
  • Advertises speed improvements of up to 14Ă—.
  • Uses Cerebras infrastructure for accelerated inference.
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