AutoGen

What it is

AutoGen (Microsoft) lets you build applications where multiple LLM agents converse and collaborate to solve tasks. The v0.4 line reworked the core into a more modular, event-driven runtime.

Why people use it

• Multi-agent patterns out of the box (e.g. a user proxy + assistant + critic loop).
• Active research lineage and many published examples.
• Good for demos and experimentation.

Watch-outs

• Historically churny APIs between major versions — pin your version.
• The "agents chatting" model can be expensive and non-deterministic in production.