OpenAI Agents SDK vs Pydantic AI
A side-by-side view built only from each listing. Prices change, so check the source links.
| OpenAI Agents SDK | Pydantic AI | |
|---|---|---|
| Good at | Lightweight Python framework from OpenAI for multi-agent workflows with handoffs and guardrails. | Type-safe Python agent framework from the Pydantic team. |
| Pricing | Free and open source (you pay your own LLM API costs) Checked 2026-10-13 · source | Free and open source (you pay your own LLM API costs) Checked 2026-10-13 · source |
| Best for | build your own agentmulti agentopen source | build your own agentopen source |
| Setup | pip install openai-agents, then Runner.run_sync(Agent(name='Assistant', instructions='...'), 'Hello'). | pip install pydantic-ai, then Agent('openai:gpt-4o').run_sync('your prompt'). |
| Links | Full listing · Official site | Full listing · Official site |
Pick OpenAI Agents SDK if…
- you want it for multi agent (listed for OpenAI Agents SDK, not Pydantic AI)
- this fits what you need: Lightweight Python framework from OpenAI for multi-agent workflows with handoffs and guardrails
- its pricing works for you: Free and open source (you pay your own LLM API costs)
Pick Pydantic AI if…
- this fits what you need: Type-safe Python agent framework from the Pydantic team
- its pricing works for you: Free and open source (you pay your own LLM API costs)