GPT-5.6 Sol goes 14x faster as OpenAI launches Ultrafast mode powered by Cerebras

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OpenAI is launching "Ultrafast," a new inference mode that delivers GPT-5.6 Sol at up to 750 output tokens per second, powered by Cerebras hardware from their $10 billion partnership.

Together with "Standard" and "Fast," Ultrafast creates a three-tier pricing structure that turns inference speed into its own product.

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