OpenAI published a preview of Ultrafast mode for GPT-5.6 Sol on August 13, 2026, at 10:00:00Z. The update introduces a high-speed execution setting designed for the model architecture.
The central performance benchmark released by OpenAI specifies processing capability reaching up to 14 times the speed of standard model operations. Ultrafast mode applies specifically to the GPT-5.6 Sol system.
Preview Specifications
The announcement establishes the following confirmed parameters for the release:
- Model: GPT-5.6 Sol
- Feature: Ultrafast mode
- Speed threshold: Up to 14X baseline speed
- Publishing entity: OpenAI
OpenAI designated the release as a preview demonstrating the maximum 14X speed ceiling for GPT-5.6 Sol.
The primary publication record logs the official release timestamp at 10:00:00Z UTC on August 13, 2026.
