Goodfire uses Ai2's open post-training stack to predict how training runs change model behavior
allen_ai · x · 2026-09-10
Ai2 highlights that training LLMs on preferred and dispreferred answers improves them while quietly worsening other behaviors. Goodfire AI used Ai2's open post-training stack to predict how a full training run would change responses to different prompts — effectively forecasting side effects of preference training before running it. Details in their technical thread.
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