Train and evaluate
browser agents
Train browser agents on real websites with Prime Intellect's RL pipelines, powered by Browserbase.
Built with
How it fits together
Cloud browsers
Browserbase
Cloud browser infrastructure that creates and manages browser sessions via API.
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Environment layer
BrowserEnv
Environment abstraction that wraps Browserbase sessions for evaluation and training.
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Prime orchestrationPrime CLI and hosted training
Orchestrates evaluation runs and RL training loops at scale.
What is BrowserEnv?
Open the hosted training run from the video above on Prime Intellect.
Two modes, one environment
DOM mode
RecommendedStructured DOM content and high-level Stagehand instructions
Best for
Instruction-following tasks, form filling, and navigation
Tools
navigateobserveactextractprime eval run browser-dom-exampleCUA mode
Screenshots and coordinate-based actions
Best for
Visual, pixel-grounded tasks and complex UIs
Tools
clicktype_textscrollscreenshotprime eval run browser-cua-exampleGet started in minutes
01
Set credentials
BROWSERBASE_API_KEY=your_key
BROWSERBASE_PROJECT_ID=your_project02
Install environment
prime env install browser-dom-example03
Run eval
prime eval run browser-dom-example