Gpt-4-0613 model just quits after ~2 seconds

I’ve been working with the API and have a functioning application that works on GPT-3.5 and GPT-4 (current 0314 model). I have been using 3.5 because it is much faster than 4 has been, but we want to upgrade to 4 as it formats the responses more reliably for our needs. When I tried using gpt-4-0613 today, I am finding that it starts responding, then within 2 seconds or so it just stops. No error, I just get the done message from the stream.

Anyone else experiencing this, or know what to troubleshoot as to why it’s just giving up?

Do you get the same issue in the playground if you paste in one of your queries?