Fugusashi Router — ModernBERT Classifier

Fine-tuned ModernBERT-base (149M params) for intelligent LLM model routing.

v1.3.0 (2026-07-07)

  • Trained on 224 seed examples across 3 model classes
  • 80.0% test accuracy (179 train / 45 test)
  • Classes: gpt-oss-120b (code/reasoning), hermes-3-405b (explanation), lfm-2.5-1.2b (factual/creative)
  • Training: 8 epochs, cosine scheduler, weighted cross-entropy
  • Inference: ~83ms on CPU, one forward pass

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