pydantic/pydantic-ai
An agent framework built on type validation: structured outputs, dependency injection, and tool schemas checked the way Pydantic checks everything. Agentiquette scores it 82/100 (A-tier), methodology v1.0, scored 2026-07-07.
Key facts
| Category | Orchestration framework |
|---|---|
| License | MIT |
| Maintainer | Pydantic |
| Compatible agents | generic |
| File patterns | |
| Triggering | manual-reference |
| GitHub metrics | 18,256 stars · 2,313 forks · 498 open issues (fetched 2026-07-07) |
| Last commit | 2026-07-07 |
| Created | 2024-06-21 |
Editorial analysis
The highest reliability score in the orchestration class, for a structural reason: validation failures surface at the boundary instead of downstream, which converts silent wrongness into loud, retryable errors. That is exactly the property this site's Loop Reliability Model rewards. Documentation quality matches the parent project's reputation.
Risks
Python-only; teams outside the Pydantic idiom pay a learning tax.
Evidence notes: Reliability: schema validation on every output and tool call; retries on validation failure are built in. Docs: examples ran as written. Eval readiness: typed outputs are directly assertable.
Install and first run
pip install pydantic-aiAlternatives in this category
The most adopted graph-based agent orchestration framework: workflows as explicit state machines with checkpointing, human-in-the-loop…
OpenAI's first-party multi-agent framework: agents, handoffs, guardrails, and tracing in a deliberately small API surface.
Google's Agent Development Kit: code-first agent construction with built-in evaluation tooling and deployment paths into the Google Cloud…
Embed this badge
Maintainers of scored entries can embed their live badge; it updates when the score does and links back to this page.
[](https://agentiquette.com/index/repos/pydantic-ai)Frequently asked questions
Is pydantic/pydantic-ai good?
pydantic/pydantic-ai scores 82/100 (A-tier) on Agentiquette's methodology v1.0, scored 2026-07-07. Strengths and weaknesses are in the editorial analysis; the score is explained dimension by dimension in the scorecard.
What is pydantic/pydantic-ai for?
An agent framework built on type validation: structured outputs, dependency injection, and tool schemas checked the way Pydantic checks everything.
Is pydantic/pydantic-ai maintained?
Last commit 2026-07-07, 498 open issues at fetch time (2026-07-07). Maintenance is scored at 92 of 100.
Maintainer of pydantic/pydantic-ai? Claim this listing and suggest corrections.