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A 3B log-analysis decision model with a two-stage curriculum beat prompted frontier models on anomaly detection at a fraction of serving cost, and shipped with its recipe and checkpoints

AspireAI community · arXiv
Lev-3B is an open 3B-parameter decision model built on Granite-4.1-3B-Base with a shared pointer readout, trained with a two-part recipe: a curriculum in which the model first learns bounded natural-language decisions using no log data at all, and a log stage that mixes the target tasks with general log data spanning 35 auxiliary tasks unrelated to either evaluation task. Evaluated on sources seen in training and on sources excluded from training, calibration and model selection, the authors report that the recipe transfers substantially better than training on log data alone, that adding general log data improves performance on excluded sources, and that at a fraction of serving cost Lev-3B outperforms prompted frontier models on anomaly detection including on an excluded logging system. The honest limitation is in the same result: it trails frontier models on attack-technique classification, and on the excluded logging system its calibrated probabilities confidently miss anomalies. The checkpoint, recipe, data manifests and prediction-level artifacts are released.
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