OpenAI says it is investigating GPT-6.1 performance degradation

The disclosure matters less for the degradation itself than for the disclosure gap: no cause, no fix timeline, no scope. That leaves anyone building on GPT-6.1 unable to judge whether this is a narrow incident or something broader, and reliability questions tend to travel faster than the underlying technical facts. The open question is whether OpenAI follows up with specifics on cause and scope, and whether similar notices become routine.