OpenAI introduces ‘Ultrafast,’ a new mode that makes GPT 5.6 Sol work at 14x the speed
In Brief
12:22 PM PDT · August 13, 2026
If you’ve ever found yourself wishing that ChatGPT was a little bit quicker on the uptake, OpenAI seems to be answering your prayers.
The AI lab has rolled out a new mode called Ultrafast, which it says is designed to seriously accelerate the pace at which its latest and most powerful model, GPT 5.6 Sol, accomplishes its work.
The company says that Ultrafast can work at 14x the speed of standard processing, delivering up to 750 output tokens — such tokens represent the distinct pieces of text generated by an LLM when it interacts with a human — per second.
“Until now, getting real-time speed typically meant choosing a smaller or more specialized model,” the company said in a blog post on Thursday. “Ultrafast points to progress in a new direction: more useful work per second.”
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