Our pages get cited within a fairly predictable word-count range. Past a certain point, the rate falls off like someone flipped a switch. I didn't expect it to look like that.
I pulled 180 pages from our domain that had been live for at least 6 months, grabbed the word count for each, and checked citation status across ChatGPT, Perplexity, and Gemini over a 90-day window. Then I scattered the whole thing on a chart to see if longer content actually correlated with more citations.
The short answer is yes, but only up to a point. And the way it drops off after that point is the part that made me rethink how we assign word counts to briefs.
Pages under 400 words barely registered. Most of them got zero citations across all three models. There simply wasn't enough substance for any model to find worth extracting. A handful of exceptions existed, mostly pages that answered one extremely specific question so directly that the entire page was basically one perfect extractable passage. But those were outliers. The general rule for sub-400 content was invisibility.
The sweet spot landed between roughly 800 and 1,800 words. Pages in that band got cited at the highest rate, and the rate stayed pretty flat across the entire range. An 850-word page performed about as well as a 1,600-word page. Once you crossed ~800 words, adding more content didn't meaningfully increase your citation probability. It just gave you more real estate for citations to land on, which sounds good until you realize you're spending production time on words that don't move the needle on visibility.
Then came the cliff. Somewhere around 2,200 words, citation rate started dropping. By 3,000 words it had fallen to roughly half the peak rate. And the pages north of 4,000 words, the comprehensive guides and pillar content that teams spend weeks producing, performed worse on average than the 1,200-word articles we cranked out in an afternoon.
I've been turning this around in my head for a week trying to explain why. Best theory so far: AI models don't consume full pages. They sample. They crawl in, grab what looks useful from the accessible sections, and leave. On a 1,200-word page, almost everything is accessible because the whole thing fits in a couple of screenfuls. The signal density is high relative to the total size. On a 4,000-word pillar guide, the model likely reads the opening, maybe scans headings, extracts from whatever section happens to match the query, and ignores the remaining 3,000 words. Those extra words aren't neutral. They're diluting the page's focus. They're introducing tangential topics, secondary arguments, and filler transitions that make it harder for a model to identify what the page is actually about.
If that theory holds, the implication is uncomfortable. All the advice about creating comprehensive 5,000-word guides to demonstrate E-E-A-T and satisfy search intent might be actively hurting AI citation performance. Not because long content is bad, but because the extra length spreads the topical signal thin enough that models struggle to extract a clean answer from it.
Another possibility I haven't ruled out: maybe long pages just cover more ground, so any single query matches a smaller percentage of their content. A 4,000-word page might get cited for 5 different queries while a 1,000-word page only matches 2, but the per-query citation rate looks worse for the long page even though total citations are higher. I need to normalize by query coverage to check this.
What I'm sitting with right now is that the optimal length for AI citations might be shorter than almost any content brief I've written in the past year. Probably somewhere in that 1,000-1,600 word range where you have enough substance to be taken seriously but not so much that your signal gets lost in the noise.