cursor-agent cli concurrent call limit

I tried to call the cursor-agent cli in a concurrent way to speed up task processing, but all requests failed with the error: ConnectError: [resource_exhausted] Error. This issue seems to only occur when using Claude and GPT models. When I switched to composer-1 or auto models, there was no such error.

I want to know whether this error is caused by the cursor’s concurrency limit or by the limitation of the underlying model. If it is caused by the concurrency limit of cursor-agent, I want to know what is the maximum concurrency number that would not lead to my account being banned.