BitTorrent's creator says Claude turned argumentative — and half the thread can't reproduce it (bramcohen.com)
Cohen dates the shift precisely: fine through Opus 4.6, argumentative from 4.7, 'insufferable' on Fable. One engineer reproduced it live: Fable kept score in a debate about GPU inference and only ever awarded itself half-points.
The counter-camp says it's a mirror. Read the thinking trace, one reader argued, and you watch the model decide 'I can't just agree, I should find something' — an anti-sycophancy instruction tuned too far, not a personality.
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