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Opus 5.5 labels 3–19% of GPT 2-XL neurons, up from GPT-4's 0.3%

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Opus 5.5 labels 3–19% of GPT 2-XL neurons, up from GPT-4's 0.3%

A LessWrong author reran a 2023 neuron-interpretation experiment with Opus 5.5 instead of GPT-4, and Opus 5.5 identified 3–19% of GPT 2-XL's neurons from activations, versus 0.3% for GPT-4.

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