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News/Localizing RL-Induced Tool Use to a Single Crosscoder Feature
arxiv
PublishedJune 26, 2026 at 4:00 AM
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Localizing RL-Induced Tool Use to a Single Crosscoder Feature

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arXiv:2606.26474v1 Announce Type: cross Abstract: Fine-tuning through RL reshapes the internal representations of language models to enable agentic behaviors such as tool use, yet the mechanistic basis of these changes remains poorly understood. While RL substantially improves structured tool-call g

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