I've found Claude to be very useful when writing on the EA Forum. However, certain prompting and other techniques can help a lot.
The main use case I'm personally interested in is writing and interacting with content on the EA Forum / LessWrong and similar, but I'm sure there are other use cases that would be relevant to this community.
If you use LLMs for coding, you should probably at least try the free trial for cursor - it lives inside your IDE and can thus read and write directly to yours files. It's a also an agent, meaning you can tell it to iterate a prompt over a list of files and it can do that for 10 minutes. It also lets you revert your code back to how it was at a different point in your chat history (although, you should still use git as the system isn't perfect and if you aren't careful it can simultaneously break and obsfuscate your code)
It will feel like magic, and it's astonishingly good at getting something working, however it will make horrible long-term decisions. You thus have to make the architectural decisions yourself, but most of the code-gen can be done by the AI.
It's helpful if you're not really sure what you want yet, and want to speedily design on the fly while instantly seeing how changes made affect the result (acknowledging that you'll have to start again, or refactor heavilly, if you want to use it longer term or at scale)