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

OpenAI previewed Ultrafast mode for GPT-5.6 Sol, delivering up to 14x the speed and generating up to 750 tokens per second, powered by Cerebras. The feature launches first in the OpenAI API to a select group of customers, with expanded access as capacity grows.

read1 min views1 publishedAug 13, 2026
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. Launching first in the OpenAI API to a select group of customers with expanded access to more businesses as capacity grows.

  • Powered by @cerebras, Ultrafast generates up to 750 tokens per second, bringing our most intelligent model to products and workflows where every second counts. Ultrafast is designed for businesses where faster frontier intelligence creates a measurable advantage, includingWe’re working with an initial group of customers to understand where this speed makes the biggest difference, and how those learnings can inform our products over time. If your business requires frontier intelligence at the highest speed, you can request to be notified as - Why announce it if it's not available to basically anyone?
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