mirror of https://github.com/hwchase17/langchain.git synced 2026-07-01 22:59:06 +00:00

Files

Mason Daugherty 6b9e22dbbc fix(langchain): tighten structured output model fallbacks (#38042 )

Provider-native structured output fallback detection now uses bounded
model-name patterns instead of broad substring checks, reducing false
positives for unrelated model IDs. The model examples and test fixtures
across OpenAI/OpenRouter-facing code were refreshed around current
OpenAI model families while preserving shipped defaults.

## Changes
- Tightened `FALLBACK_MODELS_WITH_STRUCTURED_OUTPUT` from loose string
fragments to regex patterns, with `_supports_provider_strategy` matching
full model-name segments instead of arbitrary substrings.
- Expanded structured-output fallback coverage for newer OpenAI,
Anthropic, and xAI/Grok model families, including `gpt-5.x`, newer
Claude 4/5-style names, and `grok-build`.
- Reused `_attempt_infer_model_provider` in provider tool search routing
so `_provider_from_model_name` follows the same provider inference
behavior as `init_chat_model`.
- Suppressed irrelevant provider-inference deprecation warnings during
provider tool search registry lookup.
- Refreshed OpenAI, Azure OpenAI, OpenRouter, core metadata, and example
model references from older fixtures like `gpt-4`, `gpt-4o`, `o1`, and
`o4-mini` to current test/profile models such as `gpt-5.5`,
`gpt-5-nano`, and `gpt-4.1-mini`.
- Removed outdated OpenAI test assumptions around legacy `o1` behavior
and narrowed legacy structured-output checks to explicitly legacy model
names.

2026-06-10 21:18:14 -04:00

langchain_text_splitters

chore(core): fix some any generics (#34545 )

2026-06-10 15:32:14 -04:00

scripts

ci: avoid unnecessary dep installs in lint targets (#36046 )

2026-03-17 21:23:29 -04:00

tests

fix(langchain): tighten structured output model fallbacks (#38042 )

2026-06-10 21:18:14 -04:00

extended_testing_deps.txt

chore: update lxml requirement from <7.0,>=4.9.3 to >=6.1.0,<7.0 in /libs/text-splitters (#37126 )

2026-05-01 10:12:49 -04:00

Makefile

fix(infra): correct lint_diff relative paths in package makefiles (#36333 )

2026-03-28 02:32:02 -04:00

pyproject.toml

chore: unify core versions in text-splitters. (#37523 )

2026-05-19 14:34:59 -05:00

README.md

chore(docs): update x handle references (#37081 )

2026-04-29 13:56:09 -04:00

uv.lock

hotfix(core): bump lockfile(s) (#38032 )

2026-06-10 17:05:23 -04:00

README.md

🦜✂️ LangChain Text Splitters

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

Quick Install

pip install langchain-text-splitters

🤔 What is this?

LangChain Text Splitters contains utilities for splitting into chunks a wide variety of text documents.

📖 Documentation

For full documentation, see the API reference.

📕 Releases & Versioning

See our Releases and Versioning policies.

We encourage pinning your version to a specific version in order to avoid breaking your CI when we publish new tests. We recommend upgrading to the latest version periodically to make sure you have the latest tests.

Not pinning your version will ensure you always have the latest tests, but it may also break your CI if we introduce tests that your integration doesn't pass.

💁 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.