I'd start by identifying your specific task - clearly define the task that you want the AI tool to perform. And then I'd go to some of the websites that display various AI tools.
The easy thing would be to search for it in google but since it takes so long to index the new content and make it relevant, it would be a matter of searching on twitter or in some updated directory or why not right here in product hunt, asking or searching. 👍
Thanks for the input, that's very helpful. To solve this, I'm building a tool to find the best AI tools using natural language - a directory of 3,000+ AI tools, categorized by GPT-4, ranked based on performance data and embedded by OpenAI. Check out https://www.rereview.ai and let me know what you think.