I mean, ChatGPT?
If you need a personality, try HammerAI. You can create your own characters using explicitly SFW models (I mean NGL most of the public models are porn, but there are normal ones too). It all runs locally so you have a lot of control over it… Not as flashy as others, of course.
Idk how easy it easy to just build a nuke… I feel like the long range missile is the hard part, right? The actual nuclear part isn’t quite so complex. Maybe I’m wrong.