It's pretty good at building TUIs. Although it's not bad at Swift/macOS either. But really I think the problem is that we don't have a great solution right now for cross platform native UIs that isn't a WebView (or entire Chrome browser), which doesn't feel very native. But every platform has a pretty good terminal now, even Windows.

Recently I asked Claude to build a communication tool and TUI was its first proposal. When I had a similar request with ChatGPT previously, it proposed node.js, I assume because there are more examples in its training data.

The pairing of Claude and TUI doesn't seem like a coincidence to me, perhaps there are fewer moving parts that are easy to coordinate?