Lightweight framework for multi-agent workflows from OpenAI.
Agent frameworks & SDKsopen-source
OpenAI Agents SDK vs Pydantic AI
Verdict: in our “Best framework for your first agent” ranking, OpenAI Agents SDK ranks #1 and Pydantic AI ranks #3. The table compares their verified basics; how we rank.
| Feature | OpenAI Agents SDK | Pydantic AI |
|---|---|---|
| What it is | Lightweight framework for multi-agent workflows from OpenAI. | Python agent framework from the Pydantic team. |
| Category | Agent frameworks & SDKs | Agent frameworks & SDKs |
| Pricing model | open-source | open-source |
| Integrations | API, MCP | API, MCP |
| Self-hostable | Yes | Yes |
| Open-source repo | openai/openai-agents-python | pydantic/pydantic-ai |
| Rank in “Best framework for your first agent” | #1 | #3 |
| StackRank score | Not yet benchmarked | Not yet benchmarked |
| Last verified | Oct 14, 2026 | Oct 14, 2026 |
Try them
Python agent framework from the Pydantic team.
Agent frameworks & SDKsopen-source