How much AI content is acceptable for SEO?

There is no official percentage of AI content that is acceptable for SEO. Google does not measure an AI quota, so questions like whether 20 percent AI is acceptable have no policy answer.

In practice the acceptable amount is however much survives a serious human edit. A page can be 100 percent AI-drafted and rank if every claim is verified and the writing carries real information. A page can also be fully human and still be too thin to rank.

The sites that got penalized were not over a percentage line. They published thousands of unreviewed pages. Volume without review is the actual threshold, and it is the one thing every burned site shares.

An AI content humanizer makes heavy drafts pass that edit faster than rewriting by hand.