Team Replicates Anthropic's "Teaching Claude Why" Alignment Method on Qwen and Open-Sources It

austinc3301 · x · 2026-11-03

A team from SecondLook xLab, led by Anastasia, replicated and open-sourced the mid-training data pipeline and alignment methods from Anthropic's "Teaching Claude Why" paper. They applied both interventions to Qwen 2.5 32B and 72B base models:

The team announced this as a win for open science on LLM mid-training and generalization, sharing the full data pipeline publicly.

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