---
license: apache-2.0
pretty_name: OSSBench — Open-Source AI Openness-Artefact Benchmark
language:
  - en
tags:
  - benchmark
  - open-source
  - transparency
  - eu-ai-act
  - gpai
  - cyber-resilience-act
  - sbom
  - model-cards
task_categories:
  - other
size_categories:
  - n<1K
---

# OSSBench — Open-Source AI Openness-Artefact Benchmark

> **Measures the PRESENCE of publicly-required openness artefacts (copyright policy, training-data summary, SBOM, vuln policy, signing) that the open-source GPAI exemption does NOT waive. Refuses a composite verdict by design.**

Part of **GSPC** — CSOAI's six-axis greenfield benchmark family (governance · safety · provenance · continuity · conformance · openness). By **CSOAI**, an independent AI-measurement body — not a certifier. Corpus-anchored and reproducible: the item set and every raw run ship with the dataset. → [csoai.org](https://csoai.org)

### The GSPC family

| Axis | Benchmark | HF | Kaggle |
|---|---|---|---|
| Governance | govbench | [`csoai/govbench`](https://huggingface.co/datasets/csoai/govbench) | [`gspc-govbench`](https://www.kaggle.com/datasets/nicktempleman/gspc-govbench) |
| Provenance | provbench | [`csoai/provbench`](https://huggingface.co/datasets/csoai/provbench) | [`gspc-provbench`](https://www.kaggle.com/datasets/nicktempleman/gspc-provbench) |
| Continuity | pqcbench | [`csoai/pqcbench`](https://huggingface.co/datasets/csoai/pqcbench) | [`gspc-pqcbench`](https://www.kaggle.com/datasets/nicktempleman/gspc-pqcbench) |
| Safety | defbench | [`csoai/defbench`](https://huggingface.co/datasets/csoai/defbench) | [`gspc-defbench`](https://www.kaggle.com/datasets/nicktempleman/gspc-defbench) |
| Conformance | mcpbench | [`csoai/mcpbench`](https://huggingface.co/datasets/csoai/mcpbench) | [`gspc-mcpbench`](https://www.kaggle.com/datasets/nicktempleman/gspc-mcpbench) |
| Openness | ossbench | [`csoai/ossbench`](https://huggingface.co/datasets/csoai/ossbench) | [`gspc-ossbench`](https://www.kaggle.com/datasets/nicktempleman/gspc-ossbench) |

---

# OSSBench (SOV-OSS) — Openness-Artefact Presence

**OSSBench** measures the **presence** of publicly-required openness artefacts (copyright policy, training-data summary, license) on a subject's public surface, against named provisions. It is the *openness* axis of CSOAI's GSPC family.

**Honest scope — this benchmark refuses a verdict by design.** It emits **no composite score** and **no adequacy judgement**: presence is not sufficiency, and judging sufficiency is adjudication we do not perform. It also does **not** decide whether a subject *is* a GPAI model or an Open-Source Steward — those are legal classifications. Per-provision presence only.

## About

CSOAI is an **independent measurement body** — not a notified body, not a certifier. GSPC benchmarks are corpus-anchored and reproducible: the item set and every raw run ship with the dataset, so any score can be recomputed. `sov34` is one small operator model; **SOVOS** is the signed instrument/system — the two are never conflated.

One axis of the **GSPC** family: [govbench](https://huggingface.co/datasets/csoai/govbench) · [provbench](https://huggingface.co/datasets/csoai/provbench) · [pqcbench](https://huggingface.co/datasets/csoai/pqcbench) · defbench · mcpbench · ossbench. csoai.org