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Previewing Ultrafast mode: GPT-5.6 Sol at up to 14x the speed. Launching first in the OpenAI API to…

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Representative image for Previewing Ultrafast mode: GPT-5.6 Sol at up to 14x the speed. Launching first in the OpenAI API to…

Merged summary

TL;DR - OpenAI is previewing an Ultrafast API mode that runs GPT-5.6 Sol at up to 14× its standard speed, potentially enabling lower-latency applications.

  • Initial access is limited to select OpenAI API customers.
  • Availability will expand to more businesses as capacity grows.
  • The announcement does not provide latency benchmarks, pricing, or implementation details.

Sources (1)

Previewing Ultrafast mode: GPT-5.6 Sol at up to 14x the speed. Launching first in the OpenAI API to…

@OpenAI 2026-08-13
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Providers: Hugging Face · N/A OpenAlex · N/A Publisher · N/A Semantic Scholar · N/A X · N/A Fetched 2026-09-13 14:11:39.412229 UTC

TL;DR - OpenAI is previewing an Ultrafast API mode that runs GPT-5.6 Sol at up to 14× its standard speed, potentially enabling lower-latency applications.

  • Initial access is limited to select OpenAI API customers.
  • Availability will expand to more businesses as capacity grows.
  • The announcement does not provide latency benchmarks, pricing, or implementation details.
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