If you are greedy (or cautious about how you spend, because literally RooCode can code 0.5 to 1 USD per request), you can enable slow-mode in Cursor, and just ride the wave with Sonnet-3.7 for free.
(or create a new free account and enjoy 500 fast requests)
In theory, you could use RooCode with the GitHub Copilot API too, but in practice there are limits that makes it unusable.