Noma
Open decision model from Blackdrome AI Labs: the first 18 of 32 layers of Qwen3.5-4B-Base plus trained option heads. For choice, noul and score questions it returns a probability per option, an abstain signal and ensemble uncertainty, in one pass. Serves /v1/systemone.
A single safetensors file holds 18 layers with a merged rank-16 LoRA and four bootstrap listwise option scorers that read each option's marker token; a deterministic fact channel supplies dates and quantities. English only, states up to 4,096 tokens, NVIDIA GPUs only. Training used about 34k decisions from permissive public data, code-generated items and blind-labelled items. On its own sealed set (386 human-reviewed decisions never used in training) Blackdrome reports 82.6% with ECE 0.042. On JevBench's 231 public items (a third-party benchmark, the maker's own run, not yet on the board) it reports 76.2% overall but 51.4% on the hard tier, of which 55 items were used as training templates; 46.4% on the held-out half, where it is overconfident (ECE 0.263). The maker advises routing multi-step questions to a reasoning model and keeping a person in the loop for legal, medical, financial or safety decisions. Weights and code are MPL-2.0; the NOTICE credits Qwen3.5-4B-Base (Apache-2.0).
What it decides
- choice — picks one option from a set
- score — places the input on an ordered scale
- noul — answers a yes/no question with one probability
- classify — assigns a category from a fixed taxonomy
- route — sends the input to one of several destinations
At a glance
| Parameters | 2.7B |
| Base model | Qwen/Qwen3.5-4B-Base |
| Maker | Blackdrome AI Labs |
| Released | 2026-10-01 |
| License | mpl-2.0 |
| Reported accuracy | 82.6% |
| Reported latency | about 16 ms median per decision end to end on one H100 (15.1 ms p50 / 83.8 ms p95 on JevBench's public items) |
Get the weights
pip install systemonemodels
systemone pull blackdrome-ai-labs/noma
The files are served from the maker's Hugging Face repository, BlackdromeAILabs/noma, and verified against the checksums recorded here.