gpt-5-router-aug-2025

Summary

As of its August 2025 release, GPT-5 automatically decides on a per-query basis whether a task should be handled by a quick, low-cost model or a slower, more deliberate reasoning model. This matters because the system now adapts its effort to each request, saving cost and latency on simple tasks while still giving complex problems the deep thinking they need, rather than applying one fixed level of effort to everything.