Pydantic Python Packages

pydantic

Data validation using Python type hints

1.1B 28K 3K

pydantic-core

Data validation using Python type hints

929.9M 28K 3K

fastapi

FastAPI framework, high performance, easy to learn, fast to code, ready for production

486.7M 98K 9K

pydantic-settings

Settings management using pydantic

362.7M 1K 146

jiter

Fast iterable JSON parser.

286.6M 524 58

langchain

The agent engineering platform.

253.3M 137K 23K

pydantic-ai-slim

AI Agent Framework, the Pydantic way

223.2M 17K 2K

pydantic-graph

AI Agent Framework, the Pydantic way

131.7M 17K 2K

langchain-core

The agent engineering platform.

111.6M 137K 23K

langchain-openai

The agent engineering platform.

70.9M 137K 23K

langgraph

Build resilient agents.

52.9M 32K 5K

openapi-pydantic

Modern, type-safe OpenAPI schemas in Python using Pydantic 1.8+ and 2.x

50.7M 119 23

langgraph-prebuilt

Build resilient agents.

45.8M 32K 5K

langchain-text-splitters

The agent engineering platform.

43.9M 137K 23K

langgraph-checkpoint

Build resilient agents.

42.8M 32K 5K

pydantic-extra-types

Extra Pydantic types.

42.6M 318 97

ormsgpack

MessagePack serialization library for Python derived from orjson, written in Rust using PyO3

41.9M 393 25

pydantic-ai

AI Agent Framework, the Pydantic way

41.5M 17K 2K

langgraph-sdk

Build resilient agents.

41.2M 32K 5K

pydantic-evals

AI Agent Framework, the Pydantic way

30.4M 17K 2K

json-repair

Repair malformed JSON from LLMs, APIs, logs, and user input in Python.

23.3M 5K 195

logfire

AI observability platform for production LLM and agent systems.

21.9M 4K 236

langchain-anthropic

The agent engineering platform.

19.1M 137K 23K

langchain-classic

The agent engineering platform.

18.4M 137K 23K