Our capacity for Claude 4 is limited at the moment due to the popularity of the model and therefore is not currently available in the slow pool.
Once it’s usage is stabilised and further capacity from our inference providers is available, it should be available in the slow pool soon, but for now if you are out of fast requests, you will need to enable usage-based pricing to use this model.
As @azizln has pointed out, you can still use the existing models via the slow pool by enabling them in Cursor Settings -> Models