---
title: 'Previewing Ultrafast mode: GPT-5.6 Sol at up to 14X the speed'
link: https://openai.com/index/previewing-ultrafast
source: openai-com
published: 2026-08-13T10:00:00Z
updated: 2026-08-13T10:00:00Z
first_seen: 2026-10-19T01:26:53.998049939Z
labels:
- product
summary: 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.
content: feed
html: 2026-08-13-previewing-ultrafast-mode-gpt-5-6-sol-at-up-to-14x-the-speed.html
---

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.