GPT 5.4 and Claude Opus/Sonnet 4.5/4.6 are now billed at API rates for all users, even enterprise customers. Previously, they were subsidizing these models around a factor of 10x, billing per request and not per token. Composer 2 bills for $0.08 per request on the fast model, and $0.04 per request on the slower model - no matter the tokens used.
It seems like they are targeting Enterprise above all else, relying on a enterprises signing up a bunch of paying users that rarely touch Cursor to subsidize the power users using an excessive amount of Composer tokens. It's a fair strategy, as cursor seems to increase output by 20-30% so the price is well worth it for Enterprise customers.