OpenAI Agents SDK vs smolagents
A side-by-side comparison of capabilities, autonomy, integrations, and pricing to help you choose.
Short answer: choose OpenAI Agents SDK if you want lightweight open-source framework for building multi-agent workflows (Supervised agent, free); choose smolagents if you want minimalist open-source library for agents that think in code (Supervised agent, free).
| OpenAI Agents SDK | smolagents | |
|---|---|---|
| What it is | Lightweight open-source framework for building multi-agent workflows | Minimalist open-source library for agents that think in code |
| Type | framework | framework |
| Autonomy | Supervised agent | Supervised agent |
| Pricing | free · Free (open source; pay underlying model usage) | free · Free (open source; pay model + sandbox usage) |
| Best for | developers | developers |
| Deployment | self-hosted, api | self-hosted, api |
| Modalities | text, code, voice, api | text, code, image |
| Models | model-agnostic, gpt | model-agnostic, open-source |
| Protocols | mcp, function-calling, rest-api | mcp, function-calling, rest-api |
| Integrations | OpenAI API, MCP servers, Python, JavaScript/TypeScript | Hugging Face Hub, LiteLLM, Ollama, E2B, Modal, Docker |
| Capabilities | 4 documented | 4 documented |
OpenAI Agents SDK
- +Minimal, low-abstraction framework that is quick to learn
- +Built-in handoffs, guardrails, sessions, and tracing
- +Provider-agnostic (100+ LLMs) with Python and JS/TS (and voice) SDKs
- -A framework, not a product: you build, host, and secure the agent yourself
- -Autonomy and safety depend entirely on how the developer configures it
smolagents
- +Tiny, transparent core (~1,000 lines) that is easy to read and extend
- +Code-as-action approach enables natural composability
- +Model-agnostic, multimodal, with sandboxed execution and Hub sharing
- -Minimalist by design: fewer batteries-included features than larger frameworks
- -A framework, not a product: you build, host, and secure agents yourself
Which should you choose?
OpenAI Agents SDK is lightweight open-source framework for building multi-agent workflows, best for developers. smolagents is minimalist open-source library for agents that think in code, best for developers. The right choice depends on the autonomy level you want, your existing integrations, and your budget, all compared above.
This comparison is generated from the sourced OpenAI Agents SDK and smolagents profiles. Open either profile to review its evidence and last-reviewed date.