Previewing Ultrafast mode: GPT-5.6 Sol at up to 14x the speed. Launching first in the OpenAI API to…

TL;DR - OpenAI is previewing an Ultrafast API mode that runs GPT-5.6 Sol at up to 14× its standard speed, potentially enabling lower-latency applications.

• Initial access is limited to select OpenAI API customers.
• Availability will expand to more businesses as capacity grows.
• The announcement does not provide latency benchmarks, pricing, or implementation details.