🦜🍎️ LangChain Core

PyPI - Version PyPI - License PyPI - Downloads Twitter

Looking for the JS/TS version? Check out LangChain.js.

To help you ship LangChain apps to production faster, check out LangSmith. LangSmith is a unified developer platform for building, testing, and monitoring LLM applications.

Quick Install

uv add langchain-core

🤔 What is this?

LangChain Core contains the base abstractions that power the LangChain ecosystem.

These abstractions are designed to be as modular and simple as possible.

The benefit of having these abstractions is that any provider can implement the required interface and then easily be used in the rest of the LangChain ecosystem.

⛰️ Why build on top of LangChain Core?

The LangChain ecosystem is built on top of langchain-core. Some of the benefits:

  • Modularity: We've designed Core around abstractions that are independent of each other, and not tied to any specific model provider.
  • Stability: We are committed to a stable versioning scheme, and will communicate any breaking changes with advance notice and version bumps.
  • Battle-tested: Core components have the largest install base in the LLM ecosystem, and are used in production by many companies.

📖 Documentation

For full documentation, see the API reference. For conceptual guides, tutorials, and examples on using LangChain, see the LangChain Docs. You can also chat with the docs using Chat LangChain.

📕 Releases & Versioning

See our Releases and Versioning policies.

💁 Contributing

As an open-source project in a rapidly developing field, we are extremely open to contributions, whether it be in the form of a new feature, improved infrastructure, or better documentation.

For detailed information on how to contribute, see the Contributing Guide.

Resources

  • LangChain Academy — comprehensive, free courses on LangChain libraries and products, made by the LangChain team
  • Code of Conduct — community guidelines and standards

Project links

Data verified by PyPI on Sep 4, 2026
Data provided by the project maintainers, verified at the time the release was uploaded to PyPI.

Key dates

PyPI data
Data sourced directly from PyPI's database.
  • Released:
Latest release

1 maintainer

PyPI data
Data sourced directly from PyPI's database.
Avatar for langchain from gravatar.com langchain

GitHub Statistics

Data verified by PyPI on Sep 4, 2026
The GitHub source repository was provided by the project maintainers and verified by PyPI at the time of upload. Stars, forks, and open issues/PRs are derived from that repository and have not been independently verified.

License

MIT License (MIT)

Requires

Python <4.0.0, >=3.10.0

Classifiers

Report project as malware

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distribution

langchain_core-1.6.2.tar.gz (1.0 MB view details)

Uploaded Source

Built Distribution

If you're not sure about the file name format, learn more about wheel file names.

langchain_core-1.6.2-py3-none-any.whl (571.7 kB view details)

Uploaded Python 3

File details

Details for the file langchain_core-1.6.2.tar.gz.

File metadata

  • Download URL: langchain_core-1.6.2.tar.gz
  • Upload date:
  • Size: 1.0 MB
  • Tags: Source
  • Uploaded using Trusted Publishing? Yes
  • Uploaded via: twine/7.0.0 CPython/3.13.14

File hashes

Hashes for langchain_core-1.6.2.tar.gz
Algorithm Hash digest
SHA256 1ec6d3a98f7c8cdbb5bb0deff86e7ca37e16bf4f8f49f022d10723656c62352d
MD5 d26700badd83d419deccad73877d7957
BLAKE2b-256 897b406b4a8dd43dd01f69e04aafdee206809a2097134b2f944e12802eae7948

See more details on using hashes here.

File details

Details for the file langchain_core-1.6.2-py3-none-any.whl.

File metadata

  • Download URL: langchain_core-1.6.2-py3-none-any.whl
  • Upload date:
  • Size: 571.7 kB
  • Tags: Python 3
  • Uploaded using Trusted Publishing? Yes
  • Uploaded via: twine/7.0.0 CPython/3.13.14

File hashes

Hashes for langchain_core-1.6.2-py3-none-any.whl
Algorithm Hash digest
SHA256 21e6c7cf097c68b777fd69ea00864f09bd9ca76ac73e3e3fa14e1ee366eb4711
MD5 637f9e9f748c8f551511dc3cba9bd405
BLAKE2b-256 a862d3fb7c215cb2f237c3fe84880bf347a38deafef6033b6d5f1339ba8ca401

See more details on using hashes here.

Release history Release notifications | RSS feed

This release

1.6.2 This release

2 files

1.6.1

2 files

1.6.0

2 files

1.5.6

2 files

1.5.5

2 files

1.5.4

2 files

1.5.3

2 files

1.5.2

2 files

1.5.1

2 files

1.5.0

2 files

1.4.9

2 files

1.4.8

2 files

1.4.7

2 files

1.4.6

2 files

1.4.5

2 files

1.4.4

2 files

1.4.3

2 files

1.4.2

2 files

1.4.1

2 files

1.4.0

2 files

Pre-release

1.4.0a2

2 files

Pre-release

1.4.0a1

2 files

1.3.3

2 files

1.3.2

2 files

1.3.1

2 files

1.3.0

2 files

Pre-release

1.3.0a3

2 files

Pre-release

1.3.0a2

2 files

Pre-release

1.3.0a1

2 files

1.2.31

2 files

1.2.30

2 files

1.2.29

2 files

1.2.28

2 files

1.2.27

2 files

1.2.26

2 files

1.2.25

2 files

1.2.24

2 files

1.2.23

2 files

1.2.22

2 files

1.2.21

2 files

1.2.20

2 files

1.2.19

2 files

1.2.18

2 files

1.2.17

2 files

1.2.16

2 files

1.2.15

2 files

1.2.14

2 files

1.2.13

2 files

1.2.12

2 files

1.2.11

2 files

1.2.10

2 files

1.2.9

2 files

1.2.8

2 files

1.2.7

2 files

1.2.6

2 files

1.2.5

2 files

1.2.4

2 files

1.2.3

2 files

1.2.2

2 files

1.2.1

2 files

1.2.0

2 files

1.1.3

2 files

1.1.2

2 files

1.1.1

2 files

1.1.0

2 files

1.0.7

2 files

1.0.6

2 files

1.0.5

2 files

1.0.4

2 files

1.0.3

2 files

1.0.2

2 files

1.0.1

2 files

1.0.0

2 files

Pre-release

1.0.0rc3

2 files

Pre-release

1.0.0rc2

2 files

Pre-release

1.0.0rc1

2 files

Pre-release

1.0.0a8

2 files

Pre-release

1.0.0a7

2 files

Pre-release

1.0.0a6

2 files

Pre-release

1.0.0a5

2 files

Pre-release

1.0.0a4

2 files

Pre-release

1.0.0a3

2 files

Pre-release

1.0.0a2

2 files

Pre-release

1.0.0a1

2 files

Pre-release

0.4.0.dev0

2 files

0.3.86

2 files

0.3.85

2 files

0.3.84

2 files

0.3.83

2 files

0.3.82

2 files

0.3.81

2 files

0.3.80

2 files

0.3.79

2 files

0.3.78

2 files

0.3.77

2 files

0.3.76

2 files

0.3.75

2 files

0.3.74

2 files

0.3.73

2 files

0.3.72

2 files

0.3.71

2 files

0.3.70

2 files

0.3.69

2 files

0.3.68

2 files

0.3.67

2 files

0.3.66

2 files

0.3.65

2 files

0.3.64

2 files

0.3.63

2 files

0.3.62

2 files

0.3.61

2 files

0.3.60

2 files

0.3.59

2 files

0.3.58

2 files

0.3.57

2 files

0.3.56

2 files

Pre-release

0.3.56rc1

2 files

0.3.55

2 files

0.3.54

2 files

0.3.53

2 files

0.3.52

2 files

0.3.51

2 files

0.3.50

2 files

0.3.49

2 files

0.3.48

2 files

0.3.47

2 files

0.3.46

2 files

0.3.45

2 files

Pre-release

0.3.45rc1

2 files

0.3.44

2 files

0.3.43

2 files

Yanked

0.3.42

2 files

Yanked reason: Backwards-incompatible change in structured output tracing

0.3.41

2 files

0.3.40

2 files

0.3.39

2 files

0.3.38

2 files

0.3.37

2 files

0.3.36

2 files

0.3.35

2 files

0.3.34

2 files

Pre-release

0.3.34rc2

2 files

Pre-release

0.3.34rc1

2 files

0.3.33

2 files

0.3.32

2 files

0.3.31

2 files

0.3.30

2 files

0.3.29

2 files

0.3.28

2 files

0.3.27

2 files

0.3.26

2 files

0.3.25

2 files

0.3.24

2 files

0.3.23

2 files

0.3.22

2 files

0.3.21

2 files

0.3.20

2 files

0.3.19

2 files

0.3.18

2 files

0.3.17

2 files

0.3.16

2 files

0.3.15

2 files

0.3.14

2 files

0.3.13

2 files

0.3.12

2 files

0.3.11

2 files

0.3.10

2 files

0.3.9

2 files

0.3.8

2 files

0.3.7

2 files

0.3.6

2 files

0.3.5

2 files

0.3.4

2 files

0.3.3

2 files

0.3.2

2 files

0.3.1

2 files

0.3.0

2 files

Pre-release

0.3.0.dev5

2 files

Pre-release

0.3.0.dev4

2 files

Pre-release

0.3.0.dev3

2 files

Pre-release

0.3.0.dev2

2 files

Pre-release

0.3.0.dev1

2 files

Pre-release

0.3.0.dev0

2 files

0.2.43

2 files

0.2.42

2 files

0.2.41

2 files

0.2.40

2 files

0.2.39

2 files

0.2.38

2 files

0.2.37

2 files

0.2.36

2 files

0.2.35

2 files

0.2.34

2 files

0.2.33

2 files

0.2.32

2 files

Yanked

0.2.31

2 files

Yanked reason: Regression. Broke imports of `from langchain_core.tools import ToolsRenderer, RetrieverInput`.

0.2.30

2 files

0.2.29

2 files

Pre-release

0.2.29rc1

2 files

0.2.28

2 files

0.2.27

2 files

0.2.26

2 files

0.2.25

2 files

0.2.24

2 files

0.2.23

2 files

0.2.22

2 files

0.2.21

2 files

0.2.20

2 files

0.2.19

2 files

0.2.18

2 files

0.2.17

2 files

Yanked

0.2.16

2 files

Yanked reason: Outdated ToolMessage interface. Replaced ToolMessage.raw_output with ToolMessage.artifact.

0.2.15

2 files

0.2.13

2 files

0.2.12

2 files

0.2.11

2 files

0.2.10

2 files

0.2.9

2 files

0.2.8

2 files

0.2.7

2 files

0.2.6

2 files

0.2.5

2 files

0.2.4

2 files

0.2.3

2 files

0.2.2

2 files

Pre-release

0.2.2rc1

2 files

0.2.1

2 files

0.2.0

2 files

Pre-release

0.2.0rc1

2 files

0.1.53

2 files

0.1.52

2 files

0.1.51

2 files

0.1.50

2 files

0.1.49

2 files

0.1.48

2 files

0.1.47

2 files

Pre-release

0.1.47rc1

2 files

0.1.46

2 files

0.1.45

2 files

0.1.44

2 files

0.1.43

2 files

0.1.42

2 files

Pre-release

0.1.42rc1

2 files

0.1.41

2 files

0.1.40

2 files

0.1.39

2 files

0.1.38

2 files

0.1.37

2 files

0.1.36

2 files

0.1.35

2 files

0.1.34

2 files

0.1.33

2 files

Pre-release

0.1.33rc1

2 files

0.1.32

2 files

0.1.31

2 files

0.1.30

2 files

0.1.29

2 files

0.1.28

2 files

0.1.27

2 files

0.1.26

2 files

0.1.25

2 files

0.1.24

2 files

0.1.23

2 files

0.1.22

2 files

0.1.21

2 files

0.1.20

2 files

0.1.19

2 files

0.1.18

2 files

0.1.17

2 files

0.1.16

2 files

0.1.15

2 files

Pre-release

0.1.15rc2

2 files

Pre-release

0.1.15rc1

2 files

0.1.14

2 files

0.1.13

2 files

0.1.12

2 files

Pre-release

0.1.12rc1

2 files

0.1.11

2 files

0.1.10

2 files

0.1.9

2 files

0.1.8

2 files

0.1.7

2 files

0.1.6

2 files

Yanked

0.1.5

2 files

Yanked reason: breaking changes

0.1.4

2 files

0.1.3

2 files

0.1.2

2 files

0.1.1

2 files

0.1.0

2 files

0.0.13

2 files

Pre-release

0.0.13rc2

2 files

Pre-release

0.0.13rc1

2 files

0.0.12

2 files

0.0.11

2 files

0.0.10

2 files

0.0.9

2 files

0.0.8

2 files

0.0.7

2 files

0.0.6

2 files

0.0.5

2 files

0.0.4

2 files

0.0.3

2 files

0.0.2

2 files

0.0.1

2 files

Anthropic, PBC Visionary sponsor Bloomberg Visionary sponsor Hudson River Trading Visionary sponsor Meta Visionary sponsor NVIDIA Visionary sponsor Microsoft Sustainability sponsor Depot Continuous Integration AWS Cloud computing and Security Sponsor Datadog Monitoring Fastly CDN Google Download Analytics Sentry Error logging StatusPage Status page