Official code for the paper: "Simple LLM Baselines are Competitive for Model Diffing"
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Feb 13, 2026 - Python
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model-diffing
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ActDiff: diagnose, repair, and prevent persistent domain priors in narrowly finetuned vision-language models.
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Aug 21, 2026 - Python
Supplementary code & results for "Variant-specific crosscoder features are seed-stable but not detectably task-causal in a GRPO-LoRA math setting" (ICML 2026 Mech Interp Workshop, Spotlight)
reinforcement-learning sparse-autoencoders interpretability mechanistic-interpretability crosscoders model-diffing
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Jun 11, 2026 - Jupyter Notebook
Sealed, preregistered benchmark for black-box model-diffing agents: five LoRA finetunes of Qwen3.5-9B (one null, three planted behaviours, one dropped backdoor), audited blind by Neel Nanda's diffing-agent recipe and four cheaper conditions. The recipe fails by not asking, and the auditor itself is a failure mode. MATS 12 application.
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Sep 5, 2026 - Python
Code and artifacts for The Convergence Gap: when instruction-tuned models settle on next-token predictions.
language-models reproducibility early-exit large-language-models instruction-tuning mechanistic-interpretability llm-interpretability model-diffing tuned-lens convergence-gap
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Aug 11, 2026 - Python
Code and artifacts for Same Targets, Different Computation: how post-training divides work across model layers.
language-models reproducibility fine-tuning large-language-models instruction-tuning mechanistic-interpretability activation-patching llm-interpretability model-diffing cross-patching
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Aug 11, 2026 - Python
Research workspace for model diffing between pretrained and post-trained language models.
transcoder llama sae post-training instruction-tuning mechanistic-interpretability qwen deepseek olmo llm-interpretability gemma3 model-diffing tuned-lens cross-patching
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Aug 11, 2026 - Python
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