OpenAI Swarm

Experimental Python library that teaches agent handoffs on the Chat Completions API; OpenAI now points users to its Agents SDK.

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About

Swarm is an educational project built around two ideas: agents that carry instructions and functions, and handoffs that pass a conversation from one agent to another. A run loop gets a completion, executes tool calls, switches agent when a function returns one, and stops when no calls remain. It uses the Chat Completions API, runs mostly on the client and keeps no state between calls. The README says it has been replaced by the OpenAI Agents SDK.

Use cases: agent-orchestration, education

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Fact sheet

Languages: PythonREADME
Multi-agent: YesREADME
Orchestration: handoffsREADME
Streaming: YesREADME
Memory: noneREADME
Model providers: openaiREADME
Maturity: ExperimentalREADME

Facts extracted by Claude Sonnet 5.5 from the linked sources on Oct 24, 2026. Wrong fact? Tell us.

Alternatives

Frameworks for the same language with a similar way of orchestrating agents.

Signals

Stars: 22,073
Forks: 2,345
Open issues: 29
Last commit: Apr 15, 2026 (6 months ago)

From GitHub (fetched Oct 24, 2026).

Details

License: MIT
Repository: github.com/openai/swarm
First seen: Oct 24, 2026
Last checked: Oct 24, 2026
Source: README github-graphql

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OpenAI Swarm. Agent Mart. https://agentmart.dev/harnesses/openai-swarm (last updated 2026-10-24)