Pydantic AI review (2026): is it any good?
Typed Python SDK for building AI agents
Pydantic AI report card
Very good · out of 4.0 · graded Nov 13, 2026
Best for typed Python agents on any model
Pydantic AI is an MIT-licensed Python library for building agents with typed inputs and outputs, and you can swap model providers with a string. It is code only, with no builder, and the paid observability and gateway products are sold separately by the same company.
Who Pydantic AI is for
- Fits if you write Python and want agent inputs and outputs type-checked
- Works for teams already using Pydantic that want to switch model providers without a rewrite
Who Pydantic AI is not for
- Skip it if you want a visual builder, because it is a code library only
- Not for you if you do not write Python, as there is no other language or no-code route
- Watch out: Logfire observability is separate, with Team at $49 and Growth at $249 a month
- Watch out: the AI Gateway adds a 5% markup on Personal and Team, 3% on Growth, unless you bring your own keys
- Tight if you need a paid support contract, since the SDK has no paid support tier
Why Pydantic AI gets a 3.0
Five grades, each with its reason. The GPA is their average: an A is 4 points, an F is none.
- AValue for moneyThe SDK is free under the MIT licence, so it sits well under the category's $19.99 cheapest-quarter start. Your model provider bills you directly.
- AFree plan and trialNo paid plan exists for the SDK itself and nothing is capped, so everything it does is free. Only your model usage costs money.
- BFeaturesTyped agents, many model providers, evals, graphs, memory, guardrails and durable execution via Temporal, DBOS and Prefect. Nothing in the listing shows a gap in the core job of building agents in code.
- DEase of useNo rating on record, and it is a Python library: you write code, manage dependencies and wire up your own tools. No visual editor.
- BPlatforms and integrationsRuns wherever Python runs, with MCP, AG-UI and a CLI, and works with OpenAI, Anthropic, Google, AWS Bedrock and Ollama. It is not an app, so there is no phone or desktop client.
What these grades rest on. Graded from this listing, whose facts were read from Pydantic's own pages on 13 November 2026. Not based on using the product, and shorter than our full reviews. How we review and grade.
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<a href="https://toolgpa.com/tools/pydantic-ai#review"><img src="https://toolgpa.com/badge/pydantic-ai.svg" alt="Pydantic AI: 3.0 GPA on ToolGPA" width="196" height="56"></a>Where Pydantic AI stands among AI agents
Pydantic AI's GPA of 3.0 is higher than 171 of the 178 other AI agents we grade, and level with 4.
It stands best on free plan and trial (A, above 167 of 178) and worst on ease of use (D, above 0).
Pydantic AI has no paid plan.
On features, ease of use and platforms it scores 2.3 out of 4. Nothing scores higher for less, though at least one tool matches that score at a lower price.
Each grade against the category
Every bar is all 179 AI agents we grade, cut by the letter each got. Pydantic AI’s own letter is outlined.
- AValue for moneyAbove 161 of 178, level with 17
- AFree plan and trialAbove 167 of 178, level with 11
- BFeaturesAbove 133 of 178, level with 40
- DEase of useAbove 0 of 178, level with 35
- BPlatforms and integrationsAbove 47 of 178, level with 121
Price against what you get
Each dot is one of 109 AI agents. Further left costs less, and higher up scores better on features, ease of use and platforms. Point at a dot to see which tool it is.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
Keep Pydantic AI, or make your own?
Keep it
Pydantic AI is free, so making your own would save you nothing.
And it is not the kind of software a weekend replaces. It is one of the better ones too: its GPA of 3.0 is higher than 171 of the 178 other AI agents we grade.
What you could not
- An AI agent, with the models and the safeguards behind it.
- It plugs into other products, OpenAI, Anthropic and Google among them, and has an API.
- The depth: we grade its features B, which means it covers the whole job.
What this rests on. Pydantic AI’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.
What is Pydantic AI?
Pydantic AI is an open-source Python SDK from the Pydantic team for building agents with typed inputs and outputs, tools, and a swappable choice of model provider. Related packages add evals, graph-based control flow and a harness with memory, guardrails and sub-agents. The SDK is free; Pydantic's paid products, Logfire for observability and an AI gateway, are sold separately.
Worth knowing
- It is a code library for Python; there is no hosted builder or visual editor.
- Observability through Logfire is a separate product: the free Personal plan covers 10M records a month, with Team at $49 and Growth at $249 a month.
- The AI Gateway charges a markup on built-in providers (5% on Personal and Team, 3% on Growth) unless you bring your own keys.
- Model usage is billed by whichever provider you connect.
Key features
- Typed agent loop
- Agents with typed dependencies and structured output, where any supported model is a string swap and another can be set as a fallback.
- Many model providers
- The docs list providers including OpenAI, Anthropic, Google, AWS Bedrock, Mistral, Groq, Ollama and OpenRouter.
- Harness capabilities
- Add-ons for memory, guardrails, sub-agents, planning, context management and persistence, up to a complete coding agent.
- Evals and graphs
- Pydantic Evals grades outputs and tool-call trajectories, and Pydantic Graph gives typed control flow, as separate open-source packages.
- Durable execution and interfaces
- Integrations with Temporal, DBOS, Prefect and others for long-running work, plus MCP, AG-UI, Vercel AI and a CLI.
Pydantic AI pricing
As of Nov 13, 2026, Pydantic AI is free to use.
- Starts at
- Free
- Free plan
- The SDK is free and MIT-licensed; you pay your model providers directly.
- Free trial
- None listed
| Plan | Price | What you get |
|---|---|---|
| Open source | $0 | Install the Python package and run agents in your own code; no paid plan exists for the SDK itself. |
Read from pydantic.dev on Nov 13, 2026. Prices change, so confirm with Pydantic AI before you buy.
Works with
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Common questions
Does Pydantic AI have an Android app?
No Android app was listed when its pages were read on Nov 13, 2026. Pydantic AI is listed for Web.
Does Pydantic AI have an iPhone app?
No iPhone app was listed when its pages were read on Nov 13, 2026. Pydantic AI is listed for Web.
Is Pydantic AI open source?
Yes. Pydantic AI is open source, according to its own site. It can also be run on a server of your own.
Does Pydantic AI have an API?
Yes. Pydantic AI offers a public API, according to its own site.
Sources for this page
The prices, plans, platforms and features above were read from these pages on Nov 13, 2026.