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# Capability retention: M0 (base) vs M1 (resist SFT)

arXiv:2511.21399 App. E.4 methodology — lm-eval-harness, MMLU 5-shot MC, GSM8K 8-shot CoT, greedy, accuracy on the test split.

| benchmark | metric | M0 | M1 | delta (pp) |
|---|---|---|---|---|
| mmlu | acc,none | 75.1% | 76.5% | +1.4 |
| gsm8k_cot | exact_match,flexible-extract | 78.0% | 79.5% | +1.5 |