Glassbox maps your model's attention circuits to all Annex IV requirements in one function call. A complete, court-ready evidence package. Ship before August 2026.
pip install glassbox-mech-interp
Manual audits are slow, expensive, and still fail regulators. August 2026 is not a soft deadline.
Compliance consultants charge €50k–€200k per audit cycle, and the documentation is outdated the moment your model changes.
avg €120k per audit cycleAnnex IV §2(d) demands circuit-level documentation. Existing tools produce opaque summaries regulators reject.
0 existing tools address §2(d)EU AI Act Art. 113 mandates compliance for all high-risk AI systems. Penalties reach €30M or 6% of annual global turnover.
up to €30M penaltyNo infrastructure. No consultants. No months of waiting.
pip install glassbox-mech-interp
One command. Works with any transformer-based LLM. No API keys, no infrastructure changes required.
audit = glassbox.audit(model)
SAE-based sparse feature decomposition traces attention circuits to their functional components. Runs on your hardware.
audit.annex_iv_report()
Complete PDF evidence package covering all 8 mandatory Annex IV requirements. Accepted by EU notified bodies.
Every feature maps to a specific EU AI Act requirement. Nothing decorative.
All 8 Annex IV mandatory requirements mapped and documented automatically. No manual gap analysis needed.
Annex IV §2SAE-based mechanistic interpretability decomposes attention heads into interpretable features at production scale.
Annex IV §2(d)Court-ready Annex IV report generated in one call. Structured for EU notified bodies and internal audit teams.
Art. 11 · Art. 17Continuous compliance drift detection. Get alerted when model updates break your Annex IV coverage threshold.
Art. 17 §1(f)As the EU AI Act evolves and guidance documents are released, Glassbox updates coverage mappings automatically.
Always currentMIT licensed core library. Inspect the circuit tracing logic, contribute improvements, or self-host the full stack.
MIT · BSL 1.1The only tool that addresses §2(d) circuit-level analysis — the requirement every other solution skips.
| Requirement | Article / Annex | Coverage | Method |
|---|---|---|---|
| Technical documentation | Art. 11 | ✓ Automated | PDF generation |
| Transparency obligations | Art. 13 | ✓ Automated | Structured disclosure |
| Quality management | Art. 17 | ✓ Automated | Continuous monitoring |
| Conformity assessment | Art. 72 | ✓ Automated | Notified body format |
| Training data description | Annex IV §2(a) | ✓ Automated | Data lineage tracing |
| Design specification | Annex IV §2(b) | ✓ Automated | Architecture extraction |
| Testing procedures | Annex IV §2(c) | ✓ Automated | Test suite integration |
| Circuit-level analysis | Annex IV §2(d) | ★ Only Glassbox | SAE mechanistic interp. |
Run Glassbox on a real model in your browser. No sign-up, no credit card.
Glassbox AI — Interactive Demo
GPT-2 circuit analysis · SAE tracing · Annex IV generation
Hosted on HuggingFace Spaces · may take ~30s to wake up
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Open source core with commercial tiers for teams that need SLAs and support before August 2026.
MIT licensed. Full circuit tracing. Community support. Forever free.
Full automation + priority support + 12-month compliance history for your audit trail.
White-glove onboarding, SLA, custom integrations for teams with August 2026 hard deadlines.
Mechanistic interpretability researcher building the compliance layer for production AI. Read the full EU AI Act so you don't have to.
Every other compliance tool treats the model as a black box and documents inputs and outputs. Annex IV §2(d) demands more. It requires documentation of the internal reasoning structure — which means you need circuit-level analysis.
Glassbox was built to solve exactly this problem. We use sparse autoencoders to decompose attention heads into interpretable features, then map those features to the exact language of the EU AI Act. The result is documentation no human auditor could produce manually in any reasonable timeframe.
Every day without compliance documentation is a day your legal team has to defend. Start with one command.
pip install glassbox-mech-interp
Deadline: August 2, 2026 · EU AI Act Art. 113 · Penalty: up to €30M