gpt-5.5 has recovered and is operating normally.

We are seeing failed requests for gpt-5.5 and are investigating. (HTTP 503: {"error":{"code":"modelnotfound","message":"No available channel for model gpt-5.5 under group auto (distributor) (request id: 202608271910323377259428268d9d6IOZrvD2x)","type":"newapierror"}})