Ask HN: Which AI tools do you use frequently?

There is a huge wave of AI tools, but most seem to be barely usable or error-prone for anything other than the simplest of demo use cases. So far, I haven't found any substantial value beyond just using ChatGPT directly. I also use Copilot for simple code auto-completion (and not for actual coding).

What AI tools do you personally use, or have been asked by your company to use, that you find valuable?