Pydantic-AI
https://pydantic.dev/docs/ai/overview/
Pydantic team's agent framework — type-safe agent definitions, structured outputs, tool calls validated by Pydantic schemas.
Active · Verified 2026-10-29 · fresh as of 2026-10-29 · 23 cited facts, 3 with a third-party source · 2 recorded changes · Suggest a correction
At a glance
- Type
- Type-safe LLM agent framework vendor fix
- Tier
- T2
- Latest release
- v2.62.0 (2026-10-27) registry fix
- Pricing
- searched not found fix
- Funding
- Pydantic Services Inc raised $4.7M seed 2023-02 (Sequoia, Partech); commercial steward of Pydantic OSS. third-party fix
- Freshness
- 2026-10-29 fix
- Layer
- agent-infra repo fix
- Licensing
- open-source vendor fix
- Accelerator
- sequoia-arc third-party fix
- Protocols
- ag-ui, mcp-client, opentelemetry repo fix
- Developer activity
- OpenRank 63.72 (12-mo avg 80.15) · 384 participants — 2026-09 third-party fix
When to use
Optimised for: searched not found
Anti-fit: searched not found
Pros & cons
Pros
searched not found
Cons
searched not found
Claims & capabilities
From the Pydantic data-validation team.
Technical surface
- API surface
- searched not found
- Backend storage
- not applicable — not a memory product
- Deployment
- Self-hosted only — library
- Embedding model
- not applicable — not a memory product
- Multi-tenancy
- searched not found
- MCP
- yes — MCP client via MCP capability / MCPToolset, agents can run inside MCP servers, MCPServerTool for provider-native MCP
- A2A
- searched not found
- OpenTelemetry
- searched not found
Alternatives to Pydantic-AI → live options ranked by shared design, licence, hosting and MCP support
Similar systems
Other agent frameworks (no first-party memory layer) in the catalog, ranked by inbound references.
- Model Context Protocol (MCP spec) T1
Anthropic-introduced open protocol (Nov 2024) for connecting LLMs to data sources and tools. Donated by Anthropic to the Linux Foundation's Agentic AI Foundation (announced 2025-12-09); now governed as Model Context Protocol, a Series of LF Projects, LLC. Supported across Claude, ChatGPT, VS Code, Cursor and many other clients.
- LangChain (framework) T1
Dominant Python/JS framework for LLM apps — tool calling, agents, retrievers, runnables. Memory is one component (LangMem cross-listed); the framework itself is the product.
- Vercel AI SDK T1
Vercel's TypeScript LLM SDK — streaming, tool calls, structured outputs, agents. Dominant framework for Next.js LLM apps.
- LlamaIndex (framework) T1
Data framework for LLM apps — connectors, indices, query engines, agents, workflows. Memory is one of many subsystems (LlamaIndex Memory cross-listed).
- OpenAI Agents SDK T1
OpenAI's official Python framework for agents — handoffs, guardrails, tracing built in. Successor to OpenAI Swarm (experimental); officially supported.
- LangGraph (orchestration) T1
LangChain's stateful graph runtime for agents — explicit state, persistence, time-travel debugging, human-in-the-loop. Memory is one persistence target (LangGraph Persistence cross-listed).
Sources (22 cited facts, 3 third-party)
Each fact links to the page it came from; the badge says who published it (how to read sources).
- What it is Type-safe LLM agent framework vendor
- What it does & what's distinct Pydantic team's agent framework — type-safe agent definitions, structured outputs, tool … vendor
- Claims / benefits From the Pydantic data-validation team. vendor
- Created 2024 repo
- Latest release v2.62.0 (2026-10-27) registry
- License MIT vendor
- GitHub pydantic/pydantic-ai — ~21k stars, last commit 2026-10 repo
- Funding Pydantic Services Inc raised $4.7M seed 2023-02 (Sequoia, Partech); commercial steward o… third-party
- Deployment Self-hosted only — library repo
- Founders / pedigree Samuel Colvin (CEO; creator of Pydantic); founded 2023. vendor
- Code/weights release Active — last commit 2026-05 · 17,028★ repo
- MCP support yes — MCP client via MCP capability / MCPToolset, agents can run inside MCP servers, MCP… vendor
- Runtimes Python registry
- adoption-accelerator sequoia-arc third-party
- architecture-deployment-locus local vendor
- licensing-bucket open-source vendor
- positioning-platform-vs-product platform vendor
- taxonomy-three-layer-rollup agent-infra repo
- developer-activity-opendigger {"activity":947.47,"as_of":"2026-09","openrank_12mo":80.15,"openrank_current":63.72,"par… third-party
- sdk-languages python repo
- protocol-support ag-ui,mcp-client,opentelemetry repo
- maturity ga registry
What changed
Changes to this record's lifecycle, licence, release, pricing and hosting facts, from the catalog's git history. Subscribe (Atom)
- 2026-10-29
- Homepage “https://ai.pydantic.dev/” → “https://pydantic.dev/docs/ai/overview/”
- 2026-10-27
- Latest release first recorded as “v2.62.0 (2026-10-27)” source
- Deployment first recorded as “Self-hosted only — library” source
- MCP support first recorded as “yes — MCP client via MCP capability / MCPToolset, agents can run inside MCP servers, MCPServerTool for provider-native MCP” source
Related systems
References (33)
- Anthropic Claude (foundation models) integrates with — Pydantic AI docs have an Anthropic model provider page. (verified 2026-10-29)
- Browser Use integrates with — Pydantic AI harness docs have a Browser Use integration page. (verified 2026-10-29)
- Cohere Command R+ / Command A integrates with — Pydantic AI docs have a Cohere model provider page. (verified 2026-10-29)
- Cohere Embed integrates with — Pydantic AI embeddings docs list Cohere as an embeddings provider. (verified 2026-10-29)
- Confident AI / DeepEval integrates with — Pydantic Evals third-party integrations docs have a DeepEval section. (verified 2026-10-29)
- Daytona integrates with — Pydantic AI harness docs have a Daytona sandbox integration page. (verified 2026-10-29)
- DBOS integrates with — Pydantic AI durable-execution docs have a DBOS page. (verified 2026-10-29)
- DeepSeek R1 / V3 family integrates with — Pydantic AI docs have a DeepSeek model provider page. (verified 2026-10-29)
- e2b integrates with — Pydantic AI harness docs have an E2B sandbox integration page. (verified 2026-10-29)
- ElevenLabs Conversational AI (now ElevenAgents) integrates with — Pydantic AI realtime docs connect agents to hosted ElevenLabs Agents (ElevenAgents) via ElevenLabsAgentsRealtimeModel. (verified 2026-10-29)
- Fireworks AI integrates with — Pydantic AI "Other compatible APIs" docs have a Fireworks AI section. (verified 2026-10-29)
- Google Gemini 3 family integrates with — Pydantic AI docs have a Google (Gemini) model provider page. (verified 2026-10-29)
- LangChain (framework) integrates with — Pydantic AI third-party tools docs cover using LangChain tools and toolsets. (verified 2026-10-29)
- LiteLLM integrates with — Pydantic AI "Other compatible APIs" docs have a LiteLLM section. (verified 2026-10-29)
- Meta Llama 4 family integrates with — Pydantic AI docs have a Meta (Llama API) model provider page. (verified 2026-10-29)
- Mistral Large 2 / Mixtral family integrates with — Pydantic AI docs have a Mistral model provider page. (verified 2026-10-29)
- Modal Sandboxes integrates with — Pydantic AI harness docs have a Modal sandbox integration page. (verified 2026-10-29)
- Model Context Protocol (MCP spec) integrates with — Pydantic AI docs have an MCP client page for connecting agents to MCP servers. (verified 2026-10-29)
- OpenAI Embeddings integrates with — Pydantic AI embeddings docs list OpenAI as an embeddings provider. (verified 2026-10-29)
- OpenAI GPT family (GPT-5 / GPT-4o / o3 / o4) integrates with — Pydantic AI docs have an OpenAI model provider page. (verified 2026-10-29)
- OpenAI Realtime API integrates with — Pydantic AI realtime docs have an OpenAI page for gpt-realtime voice models (OpenAIRealtimeModel). (verified 2026-10-29)
- OpenRouter integrates with — Pydantic AI docs have an OpenRouter model provider page. (verified 2026-10-29)
- Prefect integrates with — Pydantic AI docs have a Prefect durable execution integration page. (verified 2026-10-29)
- Pydantic Logfire integrates with — Pydantic AI docs have a Logfire integration page for instrumentation. (verified 2026-10-29)
- Ragas integrates with — Pydantic Evals third-party integrations docs have a Ragas section. (verified 2026-10-29)
- Restate integrates with — Pydantic AI docs have a Restate durable execution integration page. (verified 2026-10-29)
- Sentence Transformers integrates with — Pydantic AI embeddings docs list Sentence Transformers as an embeddings provider. (verified 2026-10-29)
- Temporal integrates with — Pydantic AI docs have a Temporal durable execution integration page. (verified 2026-10-29)
- Together AI integrates with — Pydantic AI "Other compatible APIs" docs have a Together AI section. (verified 2026-10-29)
- Vercel AI SDK integrates with — Pydantic AI docs have a Vercel AI SDK UI integration page (Vercel AI data stream protocol). (verified 2026-10-29)
- vLLM integrates with — Pydantic AI "Other compatible APIs" docs have a vLLM section. (verified 2026-10-29)
- Voyage AI (MongoDB) integrates with — Pydantic AI embeddings docs list VoyageAI as an embeddings provider. (verified 2026-10-29)
- xAI Grok 4 integrates with — Pydantic AI docs have an xAI model provider page. (verified 2026-10-29)
Referenced by (28)
- Arize Phoenix integrates with — Arize Phoenix docs have a Pydantic-AI integration page. (verified 2026-10-29)
- Bifrost (Maxim AI) integrates with — Bifrost SDK integrations include a drop-in proxy page for Pydantic AI. (verified 2026-10-29)
- Braintrust integrates with — Braintrust docs have a Pydantic-AI integration page. (verified 2026-10-29)
- Comet ML integrates with — Comet's Opik docs have a Pydantic-AI integration page. (verified 2026-10-29)
- Datadog Agent Observability (LLM Observability) integrates with — Datadog LLM Observability auto-instrumentation page lists a Pydantic AI LLM integration. (verified 2026-10-29)
- DBOS integrates with — DBOS integrations docs have a Pydantic AI page. (verified 2026-10-29)
- e2b integrates with — E2B docs have a Pydantic-AI integration guide. (verified 2026-10-29)
- Fireworks AI integrates with — Fireworks AI docs integration: PydanticAI. (verified 2026-10-29)
- Galileo integrates with — Galileo's third-party integrations docs list Pydantic-AI as a supported integration. (verified 2026-10-29)
- HoneyHive integrates with — HoneyHive integrations docs have a Pydantic AI tracing/integration page. (verified 2026-10-29)
- Inspect AI integrates with — Inspect AI "Agent Bridge" page documents bridging Pydantic AI agents into Inspect evaluations. (verified 2026-10-29)
- Laminar integrates with — Laminar integrations docs have a Pydantic AI observability page. (verified 2026-10-29)
- Langfuse integrates with — Langfuse's integrations directory has a Pydantic-AI integration page. (verified 2026-10-29)
- LangSmith integrates with — LangSmith docs have a tracing integration page for Pydantic-AI. (verified 2026-10-29)
- LiteLLM integrates with — LiteLLM docs have a Pydantic AI Agents provider page. (verified 2026-10-29)
- MongoDB Atlas Vector Search integrates with — MongoDB's Atlas AI Integrations page lists Pydantic-AI as an integration (some entries are marked community-maintained). (verified 2026-10-29)
- Neo4j integrates with — Neo4j's GenAI ecosystem docs have a Pydantic-AI integration page. (verified 2026-10-29)
- OpenInference integrates with — The OpenInference repo README lists an OpenInference instrumentation package for Pydantic-AI. (verified 2026-10-29)
- OpenRouter integrates with — OpenRouter docs have a community guide on using OpenRouter with PydanticAI. (verified 2026-10-29)
- Portkey AI integrates with — Portkey docs have a Pydantic AI agent framework integration page. (verified 2026-10-29)
- Pydantic Logfire integrates with — Pydantic Logfire integrations docs have a Pydantic AI page. (verified 2026-10-29)
- Restate integrates with — Restate AI docs integration page: Restate & Pydantic AI. (verified 2026-10-29)
- Temporal integrates with — Temporal integrations catalog lists Pydantic AI durable-execution integration. (verified 2026-10-29)
- Together AI integrates with — Together AI docs third-party/agent integrations: PydanticAI. (verified 2026-10-29)
- TrueFoundry AI Gateway integrates with — TrueFoundry AI Gateway ecosystem lists a Pydantic AI integration page. (verified 2026-10-29)
- Vercel AI Gateway integrates with — Vercel AI Gateway docs have a Pydantic AI framework integration page. (verified 2026-10-29)
- Weights & Biases integrates with — W&B Weave docs have a Pydantic-AI integration page. (verified 2026-10-29)
- Zep & Graphiti integrates with — Zep docs have a Pydantic AI integration page for adding Zep long-term memory. (verified 2026-10-29)