Gpt-4 is producing server error out of nowhere recently

[_j]

Possibly related or narrowing things down, a similar or possibly the same issue was affecting,

• some accounts consistently
• gpt-4 (gpt-4-0613)
• when streaming responses

The gpt-4 model streaming fails, but other models work

Experiencing the same issue. gpt-4 and gpt-4-0613 streaming fails. Only some API keys are affected - some organizations to be precise - another org works fine. Tried to create a new API key in problematic org - did not help. Currently on Usage tier 4 in the org that has problem.