Cancelling Stream Does Not Show Usage

I tried reproducing this again, and the usage data does show up now, but there’s a delay.

In my test, the immediate cancel() response still had usage: null, but polling/retrieving the response later showed usage populated. Most runs had usage appear around ~45-50 seconds after cancellation.

So the practical workaround is: after cancelling a background streaming response, don’t rely on the immediate cancel response for usage. Poll responses.retrieve(response_id) for a bit afterward, and expect usage to show up after some delay rather than instantly.