Previewing Ultrafast mode: GPT-5.6 Sol at up to 14X the speed Post published:2026-08-14 Preview Ultrafast, a new OpenAI API service tier that runs GPT-5.6 Sol up to 14× faster. Powered by Cerebras, it delivers up to 750 output tokens per second. Read more articles Previous PostOpenAI appoints Dali Rajic as Chief Revenue Officer Next PostThe builder’s guide to GPT‑5.6
