# Beyond Compression: Diagnosing How Post-Training Changes Mathematical Reasoning

Source: https://arxiv.org/abs/2609.37066
Published: 2026-09-29
Status: unreviewed source report

## Source excerpt (up to 25 words)

> Post-training is central to mathematical reasoning in modern large language models (LLMs), but endpoint pass@1 alone underidentifies what has changed. Gains may reflect newly reachable

## Review question

Check the benchmark version, sampling budget, data contamination controls, human interventions and proof-review method. A final answer or benchmark score is not evidence that every reasoning step is valid.

No independent proof check or claim of peer review.