---
id: pydantic-core
version: "2.48.0"
license: MIT
license_treatment: permissive
maintenance: active
---

# pydantic_core — Core functionality for Pydantic validation and serialization

License: permissive · Maintenance: active · Popularity: top 100 on PyPI

## Install

pip install pydantic-core
uv add pydantic-core
poetry add pydantic-core

## Description

# pydantic-core

[![CI](https://github.com/pydantic/pydantic-core/workflows/ci/badge.svg?event=push)](https://github.com/pydantic/pydantic-core/actions?query=event%3Apush+branch%3Amain+workflow%3Aci)
[![Coverage](https://codecov.io/gh/pydantic/pydantic-core/branch/main/graph/badge.svg)](https://codecov.io/gh/pydantic/pydantic-core)
[![pypi](https://img.shields.io/pypi/v/pydantic-core.svg)](https://pypi.python.org/pypi/pydantic-core)
[![versions](https://img.shields.io/pypi/pyversions/pydantic-core.svg)](https://github.com/pydantic/pydantic-core)
[![license](https://img.shields.io/github/license/pydantic/pydantic-core.svg)](https://github.com/pydantic/pydantic-core/blob/main/LICENSE)

This package provides the core functionality for [pydantic](https://pydantic.dev/docs/validation/latest/get-started/) validation and serialization.

Pydantic-core is currently around 17x faster than pydantic V1.
See [`tests/benchmarks/`](./tests/benchmarks/) for details.

## Example of direct usage

*NOTE: You should not need to use pydantic-core directly; instead, use pydantic, which in turn uses pydantic-core.*

```py
from pydantic_core import SchemaValidator, ValidationError

v =...

## AI interpretation — verify before relying

pydantic-core provides the high-performance validation and serialization engine underlying Pydantic, handling schema-based data validation for Python objects and JSON with ~17x speed improvement over Pydantic V1.

Verdict: pydantic-core is a mature, actively maintained validation engine in the top 100 PyPI packages with no known vulnerabilities, permissive MIT licensing, and pre-built wheels minimizing install friction. Direct use is discouraged in favor of the higher-level Pydantic API, but it is production-ready for those needing raw validation performance.

[View on SkillFed](https://skillfed.io/packages/pydantic-core) · [View on PyPI](https://pypi.org/project/pydantic-core/)