OpenAI Previews GPT-5.6 Sol Ultrafast Mode Powered by Cerebras for 14x Speed
OpenAI has previewed Ultrafast mode for GPT-5.6 Sol, offering speeds up to 14 times faster than normal. Powered by Cerebras, it can generate up to 750 tokens per second and will initially be available to select API customers for applications including voice, customer support, coding, commerce and financial research.
OpenAI has previewed Ultrafast mode, delivering GPT-5.6 Sol at up to 14 times the normal speed. The feature launches first in the OpenAI API for a select group of customers, with broader business access planned as capacity expands. Powered by Cerebras, Ultrafast generates up to 750 tokens per second. It targets applications where speed provides a clear advantage, including real time voice and customer support, commerce, coding, design, financial research and security response. OpenAI is working with initial customers to identify the greatest impact areas. Gemini 3.7 Flash Model Launched With Advanced Coding and Agent Capabilities; Gemini Spark Gets Support.
OpenAI Previews GPT-5.6 Sol Ultrafast Mode With 14x Speed
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. pic.twitter.com/a5dleofiDJ
— OpenAI (@OpenAI) August 13, 2026
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