WebHarbor launches: 153 mirrored real websites and 3,518 tasks for GUI web agents
HuaxiuYaoML · x · 2026-11-08
WebHarbor is out as the largest open-source environment resource for GUI web agents, built by 57 contributors from 26 institutions.
- Scale: 153 high-fidelity mirrors of real websites (Amazon, GitHub, Booking, YouTube, Steam, Airbnb, etc.), grown from just 15 environments in May 2026
- Tasks: 3,518 tasks including complex multi-step and authenticated workflows, all executable offline for reproducible evaluation and scalable RL training
- Validation: the team's offline-trained 4B agent beats a live-web baseline
Fully open-source, with all environments browsable online.
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