OpenAI's Fastest GPT Model Generations

GPT-5.6 Sol Ultrafast mode, powered by Cerebras, delivers up to 750 output tokens per second, making it OpenAI's fastest model for inference, representing a 14x speed increase over standard processing.

Sources

• OpenAI and Cerebras Bring GPT-5.6 Sol Ultrafast to Enterprise Inference - DEV Community
• Previewing Ultrafast mode: GPT-5.6 Sol at up to 14X the speed | OpenAI
• OpenAI's new Ultrafast mode runs GPT-5.6 Sol 14 times faster, on Cerebras chips - TNW

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