---
title: "OpenAI Previews Ultrafast Mode: GPT-5.6 Sol at Up to 14x Speed"
source: "OpenAI：News（RSS）"
source_tier: "t1"
url: "https://openai.com/index/previewing-ultrafast"
permalink: "https://feed.astralor.com/items/itm_6357d7795d215a7fa7069a16"
published: "2026-08-13T10:00:00.000Z"
score: 81
channel: "ai"
tags: ["API Service","Cerebras","GPT-5.6 Sol","OpenAI","Reasoning Acceleration"]
---

# OpenAI Previews Ultrafast Mode: GPT-5.6 Sol at Up to 14x Speed

## AI commentary

> This announcement matters because it's not just a speed number—it signals OpenAI's shift toward specialized ASIC routes in inference chips. For teams building real-time AI applications, especially in customer support, coding assistants, or streaming output, this could be a bellwether for cost-latency co-optimization.

## At a glance

OpenAI has introduced Ultrafast, a new API service tier that runs the GPT-5.6 Sol model at up to 14 times the normal speed, powered by Cerebras hardware, delivering up to 750 output tokens per second. This mode is designed to meet low-latency, high-throughput requirements for real-time applications, offering developers and enterprises a more efficient inference option. It marks a deeper collaboration between OpenAI and specialized chip vendors in optimizing inference speed.

## Key points

- Ultrafast is a new OpenAI API tier running GPT-5.6 Sol at up to 14x speed.
- The service is powered by Cerebras, delivering up to 750 output tokens per second.
- Targeted at low-latency real-time applications such as customer support, coding assistants, and streaming generation.
- The collaboration highlights OpenAI's growing reliance on specialized chips for inference speed optimization.

## Full text

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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