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Pydantic

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pydantic logo

Pydantic is the most widely used data validation library for Python. Fast and extensible, Pydantic parses data and enforces type hints at runtime, providing user-friendly errors when data is invalid. Its core validation engine is implemented in Rust, making it extremely fast for JSON serialization and data schema parsing.

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langchain

langchain-ai / langchain

Star 149k

The agent engineering platform.

python open-source enterprise framework typescript ai gemini openai multiagent agents ai-agents rag pydantic llm generative-ai chatgpt langchain anthropic langgraph deepagents
  • Updated Nov 12, 2026
  • Python
fastapi

fastapi / fastapi

Star 105k

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

python api json framework web rest json-schema async swagger openapi python3 asyncio swagger-ui redoc openapi3 python-types uvicorn starlette pydantic fastapi
  • Updated Nov 11, 2026
  • Python
langgraph

langchain-ai / langgraph

Star 44.8k

Build resilient agents.

python open-source enterprise framework ai gemini openai multiagent agents ai-agents rag pydantic llm generative-ai chatgpt langchain langgraph deepagents
  • Updated Nov 12, 2026
  • Python
pydantic

pydantic / pydantic

Sponsor
Star 29.5k

Data validation using Python type hints

python validation parsing json-schema hints pydantic python310 python311 python312 python313 python314
  • Updated Nov 10, 2026
  • Python

pydantic / pydantic-ai

Sponsor
Star 21.2k

How Python does AI. Agents, realtime voice, image generation, embeddings. Every model, every interface, typed end to end.

python harness pydantic agent-framework llm genai harness-engineering
  • Updated Nov 12, 2026
  • Python
sqlmodel

fastapi / sqlmodel

Star 18.6k

SQL databases in Python, designed for simplicity, compatibility, and robustness.

python json sqlalchemy sql json-schema pydantic fastapi
  • Updated Nov 11, 2026
  • Python
django-ninja

vitalik / django-ninja

Star 9.2k

💨 Fast, Async-ready, Openapi, type hints based framework for building APIs

python django rest-api swagger openapi swagger-ui pydantic django-ninja
  • Updated Nov 10, 2026
  • Python

pydantic / FastUI

Sponsor
Star 8.9k

Build better UIs faster.

react python pydantic fastapi
  • Updated Apr 1, 2026
  • Python
litestar

litestar-org / litestar

Sponsor
Star 8.5k

Light, flexible and extensible ASGI framework | Built to scale

python api rest swagger openapi asyncio asgi redoc pydantic rapidoc starlite msgspec litestar litestar-api litestar-framework
  • Updated Nov 11, 2026
  • Python
json_repair

mangiucugna / json_repair

Sponsor
Star 5.1k

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

python cli parser json streaming json-schema structured-output pydantic llm json-repair malformed-json llm-output
  • Updated Nov 12, 2026
  • Python
logfire

pydantic / logfire

Sponsor
Star 4.5k

AI observability platform for production LLM and agent systems.

python ai metrics logging trace openai observability pydantic fastapi opentelemetry ai-tools ai-observability evals llm-observability pydantic-ai agent-observability
  • Updated Nov 12, 2026
  • Python

datamodel-code-generator / datamodel-code-generator

Star 4.1k

Generate Pydantic v2 models, dataclasses, TypedDict, and msgspec.Struct from OpenAPI, JSON Schema, GraphQL, Avro, Protobuf, and raw JSON/YAML/CSV.

python graphql yaml csv generator code-generator json-schema swagger openapi swagger-codegen datamodel openapi-codegen dataclass pydantic fastapi typeddict msgspec agent-skills
  • Updated Nov 12, 2026
  • Python
vizro

mckinsey / vizro

Star 3.8k

Vizro is a low-code toolkit for building high-quality data visualization apps.

visualization python dashboard plotly data-visualization plotly-dash pydantic
  • Updated Nov 8, 2026
  • Python
rocketry

Miksus / rocketry

Sponsor
Star 3.4k

Modern scheduling library for Python

python automation framework scheduler scheduling automation-framework pydantic
  • Updated Nov 15, 2023
  • Python
opyrator

ml-tooling / opyrator

Star 3.1k

🪄 Turns your machine learning code into microservices with web API, interactive GUI, and more.

python machine-learning microservices deployment serverless functions faas python-functions type-hints pydantic fastapi streamlit
  • Updated Nov 4, 2026
  • Python
docarray

docarray / docarray

Star 3.1k

Represent, send, store and search multimodal data

elasticsearch machine-learning deep-learning protobuf pytorch data-structures nearest-neighbor-search cross-modal multi-modal semantic-search multimodal nested-data weaviate dataclass pydantic fastapi neural-search qdrant docarray
  • Updated Mar 27, 2026
  • Python

tiangolo / uvicorn-gunicorn-fastapi-docker

Sponsor
Star 2.9k

Docker image with Uvicorn managed by Gunicorn for high-performance FastAPI web applications in Python with performance auto-tuning.

python docker json web json-schema async docker-image websockets gunicorn openapi swagger-ui asgi redoc openapi3 python-types uvicorn pydantic fastapi
  • Updated Nov 6, 2026
  • Python
datachain

datachain-ai / datachain

Star 2.8k

The Context Layer for unstructured data: typed, versioned datasets over S3, GCS, Azure

knowledge-base data-processing codex ai-agents unstructured-data multimodal mlops pydantic claude-code harness-engineering data-context-layer
  • Updated Nov 12, 2026
  • Python
beanie

BeanieODM / beanie

Star 2.7k

Asynchronous Python ODM for MongoDB

python mongo orm mongodb async asynchronous pymongo odm motor asyncio pydantic beanie
  • Updated Nov 9, 2026
  • Python

jackmpcollins / magentic

Star 2.4k

Seamlessly integrate LLMs as Python functions

agent ai chatbot prompt openai magenta gpt magnetic magentic pydantic openai-api llm chatgpt agentic
  • Updated Oct 31, 2026
  • Python

Created by samuelcolvin

Latest release 7 days ago

Followers
59 followers
Repository
pydantic/pydantic
Website
github.com/topics/pydantic

Related topics

data-validation fastapi python serialization typing
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