The $20/month plan most definitely does include Opus. Just not a ton of usage allowed.

I'm on the $20 and was hitting the limit quite often. It lasted 2.5 h out of 5 h if I went all in. So even before this questionable change, we were at 50% utilization at most.

And I guess it'll go downhill from here. Anthropic, I wish you the best. Claude is a great tool at good value. But if you keep changing the product after my purchase, that's bad value.