Previewing Ultrafast mode: GPT‑5.6 Sol at up to 14X the speed

Summary

Members of the technical staff at OpenAI present demonstrations of Ultrafast mode on GPT-5.6 Sol, highlighting speed improvements on technical tasks. Aaron Friel explains that when systems go down, it resembles an emergency stop on an assembly line. He instructs the model to investigate INC-042, show the causal chain, and determine the safest immediate action by monitoring and pulling channel data. The system executes scouts and local sources, analyzing deploy history, config settings, logs, and metrics to find the root cause, which points to a pool cap change, and determines the action to restore the pool. Adam Perry discusses how performance can become a feature because speed changes behavior, noting that quantity inequality defects can be quickly checked and resolved. AJ Trbojevic notes that tasks previously requiring one to two hours of collecting and sorting data now happen within a ten to fifteen minute time frame, sometimes approaching real time. He demonstrates prompting the system to work inside an investigation folder, normalize synthetic evidence into UTC, and return three timeline bullets while citing sources and naming contradictions, such as operator claims about retries beginning six minutes after a recorded spike. Aaron Friel returns to demonstrate searching through multiple facets like logs, metrics, and deploy history at the same time. The system correlates channel records, logs, metrics, and deploy history inside the incident folder and returns specific bullets detailing the cause, evidence, and next action referencing specific relative filenames and line numbers. Sayan Sisodiya points out that when writing code, the per-unit time constraint can be met with more intelligence on tap. Jeff Niu demonstrates a quick codebase refactor that costs almost nothing and happens almost instantly, replacing duplicate retry loops with one shared retry helper while running focused tests. AJ Trbojevic emphasizes that despite the extreme speed, the quality of intelligence is not lost. Aaron Friel concludes that users always want the most intelligence at the fastest speed, and 5.6 Sol Ultrafast allows them to avoid compromising on either.