Not only that, but it also beats all the Grammarly et al, and on top of that it understands all my commands - "make it less stiff", "please make it less casual"

Not only that, but it also beats all the Grammarly et al, and on top of that it understands all my commands - "make it less stiff", "please make it less casual", "be ironic" etc. ChatGPT is still better due to it being less castrated and less likely to actually refuse my commands, but Claude works very well with text, when it works.