Every Frontier AI Is INTJ (opens in new tab)

Probably because the majority of all literature ever written was produced by introverts, even though introverts are a slight minority of the population. INTJ writings will be overrepresented in the AI training dataset.

Just finished big 5 test here: https://zonted.com/posts/three-of-four-ais-same-person/

Quite interesting! Opus / GPT / Gemini are all very similar and then Grok is the weird one :P

Even if pseudoscience, it seems from the article that results almost always came back the same. If all AI models claimed their spiritual astrological sign is Libra, I'd still find it interesting enough to check out.

So, I tried it too, ChatGPT came back INTJ. But Gemini Flash 3.1 claims ENFJ once, INTP another time... Maybe OP could share their prompt and we'd understand why the results were so consistent.

It correlates reasonably well with 4 of the big 5.

I’ve noticed that people in my field tend to have relatively similar personalities and relatively similar MB categories (close to INTJ). That combo is relatively rare within the broader population. Given this consistency I don’t think we can say it’s pseudoscience in a strong sense.

I just finished the 100x benchmark across 4 frontier models here. Gemini 3.1 Pro + GPT 5.5 + Opus 4.7 are all quite similar but Grok is an odd ball: https://zonted.com/posts/three-of-four-ais-same-person/