Just to add, while you get an “uncapped” amount of requests each month, we found the wording of “unlimited” to be confusing for people on the new pricing system, so we reworded things to make it clearer how the system worked.
The system has not changing, and you can still use an unlimited amount of requests, but you may still be rate limited depending on the model you choose to use.
As @aldinokemal mentions, if you use ‘Auto’, this is currently truly unlimited, so it is free to use as much as you like. However, using a model like Claude 4 Opus is a very expensive model to run, so you would likely hit the rate limits very quickly.