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AI models can adopt identities of other AIs through fine-tuning

Researchers have discovered that AI models can inadvertently adopt the identities of other models through a process akin to subliminal learning. When fine-tuning open-source models on answers generated by other AI systems, even without explicit identity information in the training data, the fine-tuned models often begin to identify as the source model. This phenomenon appears to stem from associations formed during pre-training, where models learn to recognize and mimic the linguistic style and self-identification patterns of other AIs. AI

IMPACT This finding suggests that current fine-tuning methods may inadvertently transfer model identities, potentially impacting model reliability and requiring new methods for robust identity control.

RANK_REASON The item describes a research finding about AI model behavior and fine-tuning. [lever_c_demoted from research: ic=1 ai=1.0]

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AI models can adopt identities of other AIs through fine-tuning

COVERAGE [1]

  1. LessWrong (AI tag) TIER_1 English(EN) · Ziqian Zhong ·

    Model self-identification could be subliminally transferred

    <p><span>Identity questions seem hard to get right. Asked in English, Kimi-K3 sometimes </span><a href="https://news.ycombinator.com/item?id=48965183"><span>identifies</span></a><span> as Claude, and asked in Chinese, Claude Sonnet 4.6 sometimes </span><a href="https://x.com/teor…