README.md

---
title: IAB Domain Classifier
emoji: 🌐
colorFrom: blue
colorTo: indigo
sdk: gradio
app_file: app.py
pinned: false
license: apache-2.0
models:
  - ZeroGPU/zlm-v1-iab-domain-classifier
short_description: URL-only IAB content & audience classification
---

# IAB Domain Classifier — demo

Type a URL or bare domain and get IAB Content and Audience categories, predicted from
the **URL string alone** (no page fetch) by
[`ZeroGPU/zlm-v1-iab-domain-classifier`](https://huggingface.co/ZeroGPU/zlm-v1-iab-domain-classifier),
a fine-tuned 149M ModernBERT multi-head classifier.

On a 784-URL independently-labeled gold benchmark
([ZeroGPU/iab-url-gold-784](https://huggingface.co/datasets/ZeroGPU/iab-url-gold-784))
it beats GPT-5.4-nano — content micro-F1 **0.385 vs 0.353** — while running ~50× faster.

This demo runs the **int8-quantized ONNX** model on CPU with the calibrated default
decision thresholds (content 0.60, audience 0.50).