# OpenAI — Previewing Ultrafast mode: GPT-5.6 Sol at up to 14X the speed

- Company: OpenAI (openai.com)
- Announced: 2026-08-13T10:00:00+00:00
- Category: product-launch
- Subject: GPT / ChatGPT / API
- Models affected: GPT-5.6 Sol
- Source: https://openai.com/index/previewing-ultrafast
- Record: https://forck.live/items/3699-previewing-ultrafast-mode-gpt-5-6-sol-at-up-to-14x-the-speed

OpenAI previews Ultrafast, a new API service tier for GPT-5.6 Sol that offers up to 14× faster inference and up to 750 output tokens per second, powered by Cerebras hardware.

## Evidence

Verbatim from https://openai.com/index/previewing-ultrafast:

> 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.

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