Lightweight browser automation powered by Claude 3.5 Sonnet

In plain words

Cerebellum is an open-source browser automation tool that uses Claude 3.5 Sonnet to interact with websites through mouse and keyboard actions, similar to human browsing. It works with any website regardless of API availability and supports Selenium-compatible browsers like Chrome, Firefox, and Safari, as well as Electron apps. Designed for developers who need to automate web tasks, it operates without requiring API access and is built on MIT-licensed open-source code.

written from the facts on this page · September 2026

From the sources

Browser automation system that uses AI-driven planning to navigate web pages and perform goals. - theredsix/cerebellum

A lightweight browser using agent that accomplishes user-defined goals on webpages using keyboard and mouse actions. Contributions to Cerebellum are welcome. For details on how to get involved, please refer to our CONTRIBUTING.md . We appreciate all contributions, whether they're bug reports, feature requests, or code changes. Browser automation system that uses AI-driven planning to navigate web pages and performfrom github.com

In the maker’s words, at launch

Hey HN! I'm excited to show off Cerebellum, a new open-source tool designed to automate browser tasks using large language models (LLMs). Cerebellum is an LLM-based AI agent that interacts with web sites using mouse and keyboard interactions, much like you would. So it works on web sites whether or not they have an…

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  Cerebellum – Open-Source Browser Control with Claude 3.5 Computer Use2024 · github.com · ▲42

  Hi HN! I was mesmerized by the Claude Computer Use reveal last week and was specifically impressed by how well it navigated websites. This motivated me to create Cerebellum, a library that lets an LLM take control of a browser. Here is a demo of Cerebellum in action, performing the goal “Find a USB C to C cable that is 10 feet long and add it to cart” on amazon.com: https://youtu.be/xaZbuaWtVkA?si=Tq9lE6BXv9wjZ-qC Currently, it uses Claude 3.5 Sonnet’s newly released computer use ability, but the ultimate goal is to crowdsource a high quality set of browser sessions to train…

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  I wrote an open-source browser alternative for Computer Use for any LLM2024 · github.com · ▲180

  Hey HN, I made Browser-Use, an open-source tool that lets (all Langchain supported) LLMs execute tasks directly in the browser just with function calling. It allows you to build agents that interact with web elements using natural language prompts. We created a layer that simplifies website interaction for LLMs by extracting xPaths and interactive elements like buttons and input fields (and other fancy things). This enables you to design custom web automation and scraping functions without manual inspection through DevTools. Hasn't this been done a lot of times? Good question, as a general…

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  Vibium – Browser automation for AI and humans, by Selenium's creatorDec 2025 · github.com · ▲443

  i started the selenium project 21 years ago. vibium is what i'd build if i started over today with ai agents in mind. go binary under the hood (handles browser, bidi, mcp) but devs never see it. just npm install vibium. python/java coming. for claude code: claude mcp add vibium -- npx -y vibium v1 ships today. ama.

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  I built a free in-browser Llama 3 chatbot powered by WebGPU2024 · github.com · ▲547

  I spent the last few days building out a nicer ChatGPT-like interface to use Mistral 7B and Llama 3 fully within a browser (no deps and installs). I’ve used the WebLLM project by MLC AI for a while to interact with LLMs in the browser when handling sensitive data but I found their UI quite lacking for serious use so I built a much better interface around WebLLM. I’ve been using it as a therapist and coach. And it’s wonderful knowing that my personal information never leaves my local computer. Should work on Desktop with Chrome or Edge. Other browsers are adding WebGPU support as well - see…

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