Currently, these limits are set by Anthropic, not by Cursor. The Cursor team has a maximum number of queries per second that Anthropic will allow.
They are in talks with Anthropic to raise these limits. However, Anthropic servers are currently under very high demand.
This is not an artificial restriction imposed by Cursor. It is due to sheer demand on Anthropic servers. Hence, Cursor is triaging premium requests to slow requests, such seems like the most reasonable thing to do.
Once Anthropic has more compute available and raises Cursor’s limit, they will be able to raise these limits on slow requests.
See here for more details: Claude 3.7 + GPT 4.5 - now available in Cursor!