There’s a version of this post that ranks tools from best to worst. This isn’t that. This is a working marketer’s field guide to four tools I’ve actually used—what each one does well, where each one will let you down, and why the question isn’t which tool is best, but which tool belongs where. Every marketer experimenting with AI right now is quietly sitting with the same question: which of these tools is actually worth the subscription? And if I’m already paying for two or three of them, am I using them right or am I just paying for the same capability twice? I’ve spent real time inside ChatGPT, Claude, Gemini, and NotebookLM over the past year. Not as a reviewer. As a working marketer building content systems, running client campaigns, and trying to make these tools actually useful—not just impressive in demos. (If you’ve been thinking about how AI is changing search visibility too, we covered that here .) Here’s what I found.…