kitio.aiOpenAI Agents SDK vs Pydantic AI
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. OpenAI Agents SDK starts at Free and Pydantic AI starts at Free. Check both pricing pages for current plans.
At a glance
Best for
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Agent handoffs
- Function and hosted tools
- Guardrails
- Sessions
- Built-in tracing
- Typed agent outputs
- Function tools
- Multi-provider support
- MCP support
- Logfire tracing
| Feature | OpenAI Agents SDK | Pydantic AI |
|---|---|---|
| Best for | OpenAI's lightweight framework for multi-agent workflows | Type-safe Python agent framework from the Pydantic team |
| Category | Agents & automation | Agents & automation |
| Pricing model | Free | Free |
| Starting price | Free | Free |
| Free plan | Yes, fully free | Yes, fully free |
| Made by | OpenAI | Pydantic |
| Based in | United States | United Kingdom |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
OpenAI Agents SDK starts at Free and Pydantic AI starts at Free. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
Prices in USD, checked Oct 28, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
OpenAI Agents SDK
- Small, easy-to-learn API
- Good tracing
- Official OpenAI support
- Model usage billed separately
- Fewer integrations than larger frameworks
Pydantic AI
- Strong typing reduces bugs
- Familiar to Pydantic users
- Model-agnostic
- Code-only
- Fewer prebuilt integrations than LangChain
Which one should you choose?
Choose OpenAI Agents SDK if you want:
- Small, easy-to-learn API
- Good tracing
- Official OpenAI support
Watch out: model usage billed separately.
Choose Pydantic AI if you want:
- Strong typing reduces bugs
- Familiar to Pydantic users
- Model-agnostic
Watch out: code-only.
OpenAI Agents SDK vs Pydantic AI FAQ
What is the difference between OpenAI Agents SDK and Pydantic AI?
OpenAI Agents SDK: OpenAI's lightweight framework for multi-agent workflows. Pydantic AI: Type-safe Python agent framework from the Pydantic team. Both are agents & automation tools.
Is OpenAI Agents SDK or Pydantic AI cheaper?
OpenAI Agents SDK starts at Free and Pydantic AI starts at Free. Check both pricing pages for current plans.
Do OpenAI Agents SDK and Pydantic AI have free plans?
OpenAI Agents SDK: Yes, fully free. Pydantic AI: Yes, fully free.
Who makes OpenAI Agents SDK?
OpenAI Agents SDK is made by OpenAI, based in United States.
Who makes Pydantic AI?
Pydantic AI is made by Pydantic, based in United Kingdom.
Which should I choose, OpenAI Agents SDK or Pydantic AI?
Choose OpenAI Agents SDK if you value small, easy-to-learn api and good tracing. Choose Pydantic AI if you value strong typing reduces bugs and familiar to pydantic users.