According to monitoring by Beating, OpenAI has begun previewing the Ultrafast mode of GPT-5.6 Sol, powered by Cerebras, achieving a maximum output speed of 750 tokens/s—14 times faster than the Standard mode. Currently, it is only available to a limited number of API customers. OpenAI has tested Ultrafast in scenarios such as troubleshooting, research, customer support, financial analysis, and agent development. For agents requiring multiple consecutive model calls, even a single-response speedup directly reduces overall task execution time. This is faster than OpenAI’s Fast mode, launched at the end of July, which reaches up to 2.5 times the speed of Standard mode, while Ultrafast pushes the limit to 14 times. OpenAI has not yet disclosed the pricing for Ultrafast or announced when it will be available on ChatGPT.
OpenAI Launches GPT-5.6 Ultrafast Mode with a 14x Speed Increase
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Summary
OpenAI has released a preview of the Ultrafast mode for GPT-5.6 Sol, powered by Cerebras. This mode delivers up to 750 tokens per second—14 times faster than Standard. It is now available to selected API users and has been tested in areas such as customer service, financial analysis, and agent development, outperforming the previous Fast mode, which was 2.5 times faster. Pricing and a ChatGPT rollout timeline have not yet been announced. Crypto news continues to highlight major AI advancements impacting the tech and blockchain sectors.
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