What does the free AEO / GEO check test?
Four of the twelve signals, as content heuristics: an extractable definition, a named category, answer-shaped content and verifiable facts. The full twelve-signal framework, including live per-engine citation testing across ChatGPT, Perplexity, Claude and Gemini, runs inside NorthPoint engagements.
Is the citeability score a guarantee of model behaviour?
No. The score out of 100 is a heuristic read of the free signals — information about your page, not a guarantee of how any answer engine behaves.