OpenAI reported elevated error rates for GPT-5.6 Luna API requests for about an hour

Some GPT-5.6 Luna API requests returned errors, affecting Chat Completions and Responses, which OpenAI marked as degraded performance. It's resolved.

• Oct 21, 3:34 PM to 4:44 PM UTC

Who is affected:

People using GPT-5.6 Luna while it lasted.

What to do:

Retry any request that failed during the incident.