OpenAI previews GPT-5.6 Sol Ultrafast mode powered by Cerebras

OpenAI previewed GPT-5.6 Sol's Ultrafast mode on August 13, 2026, claiming up to 1400% faster processing than standard mode. Cerebras powers the ultrafast tier, delivering 750 tokens/sec, 14x faster than standard processing.

Detected & updated continuously · Source: Nebula

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