---
language: en
license: mit
library_name: pytorch
tags:
  - spiking-neural-network
  - neuromorphic
  - surrogate-gradient
  - benchmark
  - catalyst
  - shd
datasets:
  - shd
metrics:
  - accuracy
model-index:
  - name: Catalyst SHD SNN Benchmark (N3)
    results:
      - task:
          type: audio-classification
          name: Spoken Digit Classification
        dataset:
          name: Spiking Heidelberg Digits (SHD)
          type: shd
        metrics:
          - name: Float Accuracy (N3)
            type: accuracy
            value: 91.0
---

# Catalyst SHD SNN Benchmark (N3)

Spiking Neural Network for spoken digit classification on SHD. #1 SOTA (91.0%), beating SpikFormer (90.4%) and Loihi 2 (90.9%).

## Model Description

- **Architecture (N3)**: 700 → 1536 (recurrent adLIF) → 20
- **Neuron model**: Adaptive Leaky Integrate-and-Fire (adLIF) with learnable per-neuron thresholds
- **Training**: Surrogate gradient BPTT, fast-sigmoid surrogate (scale=25)
- **Hardware target**: Catalyst N3 neuromorphic processor

## Results

| Metric | Value |
|--------|-------|
| Float accuracy | 91.0% |
| Parameters | 3,470,484 |

## Reproduce

```bash
git clone https://github.com/catalyst-neuromorphic/catalyst-benchmarks.git
cd catalyst-benchmarks
pip install -e .
python shd/train.py --neuron adlif --hidden 1536 --epochs 200 --device cuda:0 --amp
```

## Links

- **Benchmark repo**: [catalyst-neuromorphic/catalyst-benchmarks](https://github.com/catalyst-neuromorphic/catalyst-benchmarks)
- **Cloud API**: [catalyst-neuromorphic.com](https://catalyst-neuromorphic.com)
- **N3 paper**: [Zenodo DOI 10.5281/zenodo.18881283](https://zenodo.org/records/18881283)
- **N2 paper**: [Zenodo DOI 10.5281/zenodo.18728256](https://zenodo.org/records/18728256)
- **N1 paper**: [Zenodo DOI 10.5281/zenodo.18727094](https://zenodo.org/records/18727094)

## Citation

```bibtex
@misc{catalyst-benchmarks-2026,
  author = {Shulayev Barnes, Henry},
  title = {Catalyst Neuromorphic Benchmarks},
  year = {2026},
  url = {https://github.com/catalyst-neuromorphic/catalyst-benchmarks}
}
```