# OpenManus

OpenManus is an open-source agent framework, built as a free alternative to the invite-only Manus agent, that gives a single agent web browsing, code execution and tool use from a plain-language goal.

It installs into a conda or uv-managed Python 3.12 environment and starts a browser-automation MCP server by default, attaching to a local Chrome or Chromium install automatically with no API key needed, or optionally to an isolated cloud browser once authenticated; a separate browser-testing toolkit can be used instead if its own Playwright browser is installed. Configuration lives in a TOML file naming the LLM provider, model, API key and a separate vision-model section.

A companion project, OpenManus-RL, applies reinforcement-learning methods such as GRPO to tune LLM agents, developed together with researchers from the University of Illinois Urbana-Champaign.

Python, MIT licensed.

Website: https://openmanus.github.io/