I've sent two Claude generated articles to
https://copyleaks.com/ai-content-detector, one was 100% AI, the other was 0%. ZeroGpt and QuillBot have them at around 20% AI. This is how useful these tools are. You will only get fooled by them, 100% unreliable.
Google knows how to detect AI content, and also knows if the AI content is helpful or not. I'm still testing, results are mixed.
I can't edit all articles manually, I won't pass them through a humanizer because it comes out as total shit. From API to production directly. All articles are factually accurate, so in the end engagement should be OK. I'm going to burn all my Claude, Openrouter, Fireworks credits anyway...
OpenAI is one of the worst "writers" I've tested, Claude is much, much better. Deepseek is also good but unreliable in the output, Gemini is OK (I use if for parts of the text which need 2-3 edits along the way, because it's very cheap).
Edit: forgot to mention that I'm not expecting to succeed with no human editing, but it's worth a try