OpenAI introduces Ultrafast mode for GPT-5.6 Sol

OpenAI has rolled out a new operating mode called Ultrafast, which is designed to significantly accelerate the pace at which its flagship model, GPT-5.6 Sol, completes tasks. According to the laboratory, the new mode operates at fourteen times the speed of standard processing.

Performance and Metrics

The system is capable of delivering up to 750 output tokens per second. Historically, achieving real-time generation speeds has required deploying smaller or more specialized models. Ultrafast represents an alternative path, maintaining the capabilities of a larger architecture while increasing the volume of output generated per second.

Competitors in the artificial intelligence sector have pursued similar strategies. Anthropic previously introduced accelerated options for its Claude models, though the throughput offered by OpenAI in this release represents a notable shift in generation velocity.

Enterprise Applications

OpenAI suggests that the high-velocity version of GPT-5.6 Sol is suitable for time-sensitive corporate workflows. Notable applications include:

• Incident response operations
• Customer service and support systems
• Financial market analysis
• E-commerce logistics and management

Availability and Infrastructure

Ultrafast is currently powered by a partnership with chipmaker Cerebras. The feature is entering a preview phase and is initially available to a restricted group of enterprise customers. OpenAI stated that broader access will be granted incrementally as processing capacity expands over time.