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.