Pydantic Python Packages

pydantic

Data validation using Python type hints

981.6M 28K 3K

pydantic-core

Data validation using Python type hints

862.7M 28K 3K

fastapi

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

446.6M 98K 9K

pydantic-settings

Settings management using pydantic

322.5M 1K 139

jiter

Fast iterable JSON parser.

264M 524 58

langchain

The agent engineering platform

238.8M 136K 22K

pydantic-ai-slim

AI Agent Framework, the Pydantic way

161.4M 17K 2K

langchain-core

The agent engineering platform

107.1M 136K 22K

pydantic-graph

AI Agent Framework, the Pydantic way

83.6M 17K 2K

langchain-openai

The agent engineering platform

65.8M 136K 22K

openapi-pydantic

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

52.9M 119 23

langgraph

Build resilient language agents as graphs.

48.4M 31K 5K

langchain-text-splitters

The agent engineering platform

43M 136K 22K

langgraph-prebuilt

Build resilient language agents as graphs.

40.6M 31K 5K

ormsgpack

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

39.7M 390 25

pydantic-extra-types

Extra Pydantic types.

39.5M 316 95

langgraph-checkpoint

Build resilient language agents as graphs.

39.2M 31K 5K

langgraph-sdk

Build resilient language agents as graphs.

38.5M 31K 5K

pydantic-ai

AI Agent Framework, the Pydantic way

31.5M 17K 2K

logfire

AI observability platform for production LLM and agent systems.

24.9M 4K 230

pydantic-evals

AI Agent Framework, the Pydantic way

22.9M 17K 2K

json-repair

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

20.2M 5K 187

langchain-anthropic

The agent engineering platform

17.9M 136K 22K

langchain-classic

The agent engineering platform

16.4M 136K 22K