Merge branch 'master' into pprados/06-pdfplumber

.github/CODEOWNERS

@@ -1,2 +1,2 @@
-/.github/   @efriis @baskaryan @ccurme
+/.github/   @baskaryan @ccurme
-/libs/packages.yml   @efriis
+/libs/packages.yml   @ccurme

.github/PULL_REQUEST_TEMPLATE.md

@@ -26,4 +26,4 @@ Additional guidelines:
 - Changes should be backwards compatible.
 - If you are adding something to community, do not re-import it in langchain.
 
-If no one reviews your PR within a few days, please @-mention one of baskaryan, efriis, eyurtsev, ccurme, vbarda, hwchase17.
+If no one reviews your PR within a few days, please @-mention one of baskaryan, eyurtsev, ccurme, vbarda, hwchase17.

docs/api_reference/_static/css/custom.css

@@ -328,7 +328,7 @@ html[data-theme=dark] .MathJax_SVG * {
 }
 
 .bd-sidebar-primary {
-    width: 22%;  /* Adjust this value to your preference */
+    width: max-content;  /* Adjust this value to your preference */
     line-height: 1.4;
 }
 

docs/docs/contributing/reference/faq.mdx

@@ -35,5 +35,5 @@ Please reference our [Review Process](review_process.mdx).
 
 ### I think my PR was closed in a way that didn't follow the review process. What should I do?
 
-Tag `@efriis` in the PR comments referencing the portion of the review
+Tag `@ccurme` in the PR comments referencing the portion of the review
 process that you believe was not followed. We'll take a look!

docs/vercel_overrides.txt

@@ -1 +1,2 @@
-httpx
+httpx
+grpcio

libs/community/langchain_community/embeddings/ascend.py

@@ -30,6 +30,7 @@ class AscendEmbeddings(Embeddings, BaseModel):
     document_instruction: str = ""
     use_fp16: bool = True
     pooling_method: Optional[str] = "cls"
+    batch_size: int = 32
     model: Any
     tokenizer: Any
 
@@ -119,7 +120,18 @@ class AscendEmbeddings(Embeddings, BaseModel):
             )
 
     def embed_documents(self, texts: List[str]) -> List[List[float]]:
-        return self.encode([self.document_instruction + text for text in texts])
+        try:
+            import numpy as np
+        except ImportError as e:
+            raise ImportError(
+                "Unable to import numpy, please install with `pip install -U numpy`."
+            ) from e
+        embedding_list = []
+        for i in range(0, len(texts), self.batch_size):
+            texts_ = texts[i : i + self.batch_size]
+            emb = self.encode([self.document_instruction + text for text in texts_])
+            embedding_list.append(emb)
+        return np.concatenate(embedding_list)
 
     def embed_query(self, text: str) -> List[float]:
         return self.encode([self.query_instruction + text])[0]

libs/community/langchain_community/llms/xinference.py

@@ -1,8 +1,10 @@
 from __future__ import annotations
 
+import json
 from typing import (
     TYPE_CHECKING,
     Any,
+    AsyncIterator,
     Dict,
     Generator,
     Iterator,
@@ -12,7 +14,12 @@ from typing import (
     Union,
 )
 
-from langchain_core.callbacks import CallbackManagerForLLMRun
+import aiohttp
+import requests
+from langchain_core.callbacks import (
+    AsyncCallbackManagerForLLMRun,
+    CallbackManagerForLLMRun,
+)
 from langchain_core.language_models.llms import LLM
 from langchain_core.outputs import GenerationChunk
 
@@ -126,6 +133,7 @@ class Xinference(LLM):
         self,
         server_url: Optional[str] = None,
         model_uid: Optional[str] = None,
+        api_key: Optional[str] = None,
         **model_kwargs: Any,
     ):
         try:
@@ -155,7 +163,13 @@ class Xinference(LLM):
         if self.model_uid is None:
             raise ValueError("Please provide the model UID")
 
-        self.client = RESTfulClient(server_url)
+        self._headers: Dict[str, str] = {}
+        self._cluster_authed = False
+        self._check_cluster_authenticated()
+        if api_key is not None and self._cluster_authed:
+            self._headers["Authorization"] = f"Bearer {api_key}"
+
+        self.client = RESTfulClient(server_url, api_key)
 
     @property
     def _llm_type(self) -> str:
@@ -171,6 +185,20 @@ class Xinference(LLM):
             **{"model_kwargs": self.model_kwargs},
         }
 
+    def _check_cluster_authenticated(self) -> None:
+        url = f"{self.server_url}/v1/cluster/auth"
+        response = requests.get(url)
+        if response.status_code == 404:
+            self._cluster_authed = False
+        else:
+            if response.status_code != 200:
+                raise RuntimeError(
+                    f"Failed to get cluster information, "
+                    f"detail: {response.json()['detail']}"
+                )
+            response_data = response.json()
+            self._cluster_authed = bool(response_data["auth"])
+
     def _call(
         self,
         prompt: str,
@@ -305,3 +333,61 @@ class Xinference(LLM):
                 return GenerationChunk(text=token)
         else:
             raise TypeError("stream_response type error!")
+
+    async def _astream(
+        self,
+        prompt: str,
+        stop: Optional[List[str]] = None,
+        run_manager: Optional[AsyncCallbackManagerForLLMRun] = None,
+        **kwargs: Any,
+    ) -> AsyncIterator[GenerationChunk]:
+        generate_config = kwargs.get("generate_config", {})
+        generate_config = {**self.model_kwargs, **generate_config}
+        if stop:
+            generate_config["stop"] = stop
+        async for stream_resp in self._acreate_generate_stream(prompt, generate_config):
+            if stream_resp:
+                chunk = self._stream_response_to_generation_chunk(stream_resp)
+                if run_manager:
+                    await run_manager.on_llm_new_token(
+                        chunk.text,
+                        verbose=self.verbose,
+                    )
+                yield chunk
+
+    async def _acreate_generate_stream(
+        self, prompt: str, generate_config: Optional[Dict[str, List[str]]] = None
+    ) -> AsyncIterator[str]:
+        request_body: Dict[str, Any] = {"model": self.model_uid, "prompt": prompt}
+        if generate_config is not None:
+            for key, value in generate_config.items():
+                request_body[key] = value
+
+        stream = bool(generate_config and generate_config.get("stream"))
+        async with aiohttp.ClientSession() as session:
+            async with session.post(
+                url=f"{self.server_url}/v1/completions",
+                json=request_body,
+            ) as response:
+                if response.status != 200:
+                    if response.status == 404:
+                        raise FileNotFoundError(
+                            "astream call failed with status code 404."
+                        )
+                    else:
+                        optional_detail = response.text
+                        raise ValueError(
+                            f"astream call failed with status code {response.status}."
+                            f" Details: {optional_detail}"
+                        )
+
+                async for line in response.content:
+                    if not stream:
+                        yield json.loads(line)
+                    else:
+                        json_str = line.decode("utf-8")
+                        if line.startswith(b"data:"):
+                            json_str = json_str[len(b"data:") :].strip()
+                            if not json_str:
+                                continue
+                            yield json.loads(json_str)

libs/core/langchain_core/callbacks/file.py

@@ -2,6 +2,7 @@
 
 from __future__ import annotations
 
+from pathlib import Path
 from typing import TYPE_CHECKING, Any, Optional, TextIO, cast
 
 from langchain_core.callbacks import BaseCallbackHandler
@@ -30,7 +31,7 @@ class FileCallbackHandler(BaseCallbackHandler):
             mode: The mode to open the file in. Defaults to "a".
             color: The color to use for the text. Defaults to None.
         """
-        self.file = cast(TextIO, open(filename, mode, encoding="utf-8"))  # noqa: SIM115
+        self.file = cast(TextIO, Path(filename).open(mode, encoding="utf-8"))  # noqa: SIM115
         self.color = color
 
     def __del__(self) -> None:

libs/core/langchain_core/documents/base.py

@@ -3,7 +3,7 @@ from __future__ import annotations
 import contextlib
 import mimetypes
 from io import BufferedReader, BytesIO
-from pathlib import PurePath
+from pathlib import Path, PurePath
 from typing import TYPE_CHECKING, Any, Literal, Optional, Union, cast
 
 from pydantic import ConfigDict, Field, field_validator, model_validator
@@ -151,8 +151,7 @@ class Blob(BaseMedia):
     def as_string(self) -> str:
         """Read data as a string."""
         if self.data is None and self.path:
-            with open(str(self.path), encoding=self.encoding) as f:
+            return Path(self.path).read_text(encoding=self.encoding)
-                return f.read()
         elif isinstance(self.data, bytes):
             return self.data.decode(self.encoding)
         elif isinstance(self.data, str):
@@ -168,8 +167,7 @@ class Blob(BaseMedia):
         elif isinstance(self.data, str):
             return self.data.encode(self.encoding)
         elif self.data is None and self.path:
-            with open(str(self.path), "rb") as f:
+            return Path(self.path).read_bytes()
-                return f.read()
         else:
             msg = f"Unable to get bytes for blob {self}"
             raise ValueError(msg)
@@ -180,7 +178,7 @@ class Blob(BaseMedia):
         if isinstance(self.data, bytes):
             yield BytesIO(self.data)
         elif self.data is None and self.path:
-            with open(str(self.path), "rb") as f:
+            with Path(self.path).open("rb") as f:
                 yield f
         else:
             msg = f"Unable to convert blob {self}"

libs/core/langchain_core/language_models/llms.py

@@ -1402,7 +1402,7 @@ class BaseLLM(BaseLanguageModel[str], ABC):
             llm.save(file_path="path/llm.yaml")
         """
         # Convert file to Path object.
-        save_path = Path(file_path) if isinstance(file_path, str) else file_path
+        save_path = Path(file_path)
 
         directory_path = save_path.parent
         directory_path.mkdir(parents=True, exist_ok=True)
@@ -1411,10 +1411,10 @@ class BaseLLM(BaseLanguageModel[str], ABC):
         prompt_dict = self.dict()
 
         if save_path.suffix == ".json":
-            with open(file_path, "w") as f:
+            with save_path.open("w") as f:
                 json.dump(prompt_dict, f, indent=4)
         elif save_path.suffix.endswith((".yaml", ".yml")):
-            with open(file_path, "w") as f:
+            with save_path.open("w") as f:
                 yaml.dump(prompt_dict, f, default_flow_style=False)
         else:
             msg = f"{save_path} must be json or yaml"

libs/core/langchain_core/prompts/base.py

@@ -368,16 +368,16 @@ class BasePromptTemplate(
             raise NotImplementedError(msg)
 
         # Convert file to Path object.
-        save_path = Path(file_path) if isinstance(file_path, str) else file_path
+        save_path = Path(file_path)
 
         directory_path = save_path.parent
         directory_path.mkdir(parents=True, exist_ok=True)
 
         if save_path.suffix == ".json":
-            with open(file_path, "w") as f:
+            with save_path.open("w") as f:
                 json.dump(prompt_dict, f, indent=4)
         elif save_path.suffix.endswith((".yaml", ".yml")):
-            with open(file_path, "w") as f:
+            with save_path.open("w") as f:
                 yaml.dump(prompt_dict, f, default_flow_style=False)
         else:
             msg = f"{save_path} must be json or yaml"

libs/core/langchain_core/prompts/chat.py

@@ -3,6 +3,7 @@
 from __future__ import annotations
 
 from abc import ABC, abstractmethod
+from pathlib import Path
 from typing import (
     TYPE_CHECKING,
     Annotated,
@@ -48,7 +49,6 @@ from langchain_core.utils.interactive_env import is_interactive_env
 
 if TYPE_CHECKING:
     from collections.abc import Sequence
-    from pathlib import Path
 
 
 class BaseMessagePromptTemplate(Serializable, ABC):
@@ -599,8 +599,7 @@ class _StringImageMessagePromptTemplate(BaseMessagePromptTemplate):
         Returns:
             A new instance of this class.
         """
-        with open(str(template_file)) as f:
+        template = Path(template_file).read_text()
-            template = f.read()
         return cls.from_template(template, input_variables=input_variables, **kwargs)
 
     def format_messages(self, **kwargs: Any) -> list[BaseMessage]:

libs/core/langchain_core/prompts/loading.py

@@ -53,8 +53,7 @@ def _load_template(var_name: str, config: dict) -> dict:
         template_path = Path(config.pop(f"{var_name}_path"))
         # Load the template.
         if template_path.suffix == ".txt":
-            with open(template_path) as f:
+            template = template_path.read_text()
-                template = f.read()
         else:
             raise ValueError
         # Set the template variable to the extracted variable.
@@ -67,10 +66,11 @@ def _load_examples(config: dict) -> dict:
     if isinstance(config["examples"], list):
         pass
     elif isinstance(config["examples"], str):
-        with open(config["examples"]) as f:
+        path = Path(config["examples"])
-            if config["examples"].endswith(".json"):
+        with path.open() as f:
+            if path.suffix == ".json":
                 examples = json.load(f)
-            elif config["examples"].endswith((".yaml", ".yml")):
+            elif path.suffix in {".yaml", ".yml"}:
                 examples = yaml.safe_load(f)
             else:
                 msg = "Invalid file format. Only json or yaml formats are supported."
@@ -168,13 +168,13 @@ def _load_prompt_from_file(
 ) -> BasePromptTemplate:
     """Load prompt from file."""
     # Convert file to a Path object.
-    file_path = Path(file) if isinstance(file, str) else file
+    file_path = Path(file)
     # Load from either json or yaml.
     if file_path.suffix == ".json":
-        with open(file_path, encoding=encoding) as f:
+        with file_path.open(encoding=encoding) as f:
             config = json.load(f)
     elif file_path.suffix.endswith((".yaml", ".yml")):
-        with open(file_path, encoding=encoding) as f:
+        with file_path.open(encoding=encoding) as f:
             config = yaml.safe_load(f)
     else:
         msg = f"Got unsupported file type {file_path.suffix}"

libs/core/langchain_core/prompts/prompt.py

@@ -3,6 +3,7 @@
 from __future__ import annotations
 
 import warnings
+from pathlib import Path
 from typing import TYPE_CHECKING, Any, Optional, Union
 
 from pydantic import BaseModel, model_validator
@@ -17,8 +18,6 @@ from langchain_core.prompts.string import (
 )
 
 if TYPE_CHECKING:
-    from pathlib import Path
-
     from langchain_core.runnables.config import RunnableConfig
 
 
@@ -238,8 +237,7 @@ class PromptTemplate(StringPromptTemplate):
         Returns:
             The prompt loaded from the file.
         """
-        with open(str(template_file), encoding=encoding) as f:
+        template = Path(template_file).read_text(encoding=encoding)
-            template = f.read()
         if input_variables:
             warnings.warn(
                 "`input_variables' is deprecated and ignored.",

libs/core/langchain_core/runnables/base.py

@@ -1644,8 +1644,13 @@ class Runnable(Generic[Input, Output], ABC):
 
         .. code-block:: python
 
-            from langchain_core.runnables import RunnableLambda
+            from langchain_core.runnables import RunnableLambda, Runnable
+            from datetime import datetime, timezone
             import time
+            import asyncio
+
+            def format_t(timestamp: float) -> str:
+                return datetime.fromtimestamp(timestamp, tz=timezone.utc).isoformat()
 
             async def test_runnable(time_to_sleep : int):
                 print(f"Runnable[{time_to_sleep}s]: starts at {format_t(time.time())}")
@@ -1653,12 +1658,12 @@ class Runnable(Generic[Input, Output], ABC):
                 print(f"Runnable[{time_to_sleep}s]: ends at {format_t(time.time())}")
 
             async def fn_start(run_obj : Runnable):
-                print(f"on start callback starts at {format_t(time.time())}
+                print(f"on start callback starts at {format_t(time.time())}")
                 await asyncio.sleep(3)
                 print(f"on start callback ends at {format_t(time.time())}")
 
             async def fn_end(run_obj : Runnable):
-                print(f"on end callback starts at {format_t(time.time())}
+                print(f"on end callback starts at {format_t(time.time())}")
                 await asyncio.sleep(2)
                 print(f"on end callback ends at {format_t(time.time())}")
 
@@ -1671,18 +1676,18 @@ class Runnable(Generic[Input, Output], ABC):
 
             asyncio.run(concurrent_runs())
             Result:
-            on start callback starts at 2024-05-16T14:20:29.637053+00:00
+            on start callback starts at 2025-03-01T07:05:22.875378+00:00
-            on start callback starts at 2024-05-16T14:20:29.637150+00:00
+            on start callback starts at 2025-03-01T07:05:22.875495+00:00
-            on start callback ends at 2024-05-16T14:20:32.638305+00:00
+            on start callback ends at 2025-03-01T07:05:25.878862+00:00
-            on start callback ends at 2024-05-16T14:20:32.638383+00:00
+            on start callback ends at 2025-03-01T07:05:25.878947+00:00
-            Runnable[3s]: starts at 2024-05-16T14:20:32.638849+00:00
+            Runnable[2s]: starts at 2025-03-01T07:05:25.879392+00:00
-            Runnable[5s]: starts at 2024-05-16T14:20:32.638999+00:00
+            Runnable[3s]: starts at 2025-03-01T07:05:25.879804+00:00
-            Runnable[3s]: ends at 2024-05-16T14:20:35.640016+00:00
+            Runnable[2s]: ends at 2025-03-01T07:05:27.881998+00:00
-            on end callback starts at 2024-05-16T14:20:35.640534+00:00
+            on end callback starts at 2025-03-01T07:05:27.882360+00:00
-            Runnable[5s]: ends at 2024-05-16T14:20:37.640169+00:00
+            Runnable[3s]: ends at 2025-03-01T07:05:28.881737+00:00
-            on end callback starts at 2024-05-16T14:20:37.640574+00:00
+            on end callback starts at 2025-03-01T07:05:28.882428+00:00
-            on end callback ends at 2024-05-16T14:20:37.640654+00:00
+            on end callback ends at 2025-03-01T07:05:29.883893+00:00
-            on end callback ends at 2024-05-16T14:20:39.641751+00:00
+            on end callback ends at 2025-03-01T07:05:30.884831+00:00
 
         """
         from langchain_core.tracers.root_listeners import AsyncRootListenersTracer

libs/core/langchain_core/runnables/graph_mermaid.py

@@ -2,6 +2,7 @@ import asyncio
 import base64
 import re
 from dataclasses import asdict
+from pathlib import Path
 from typing import Literal, Optional
 
 from langchain_core.runnables.graph import (
@@ -290,13 +291,9 @@ async def _render_mermaid_using_pyppeteer(
     img_bytes = await page.screenshot({"fullPage": False})
     await browser.close()
 
-    def write_to_file(path: str, bytes: bytes) -> None:
-        with open(path, "wb") as file:
-            file.write(bytes)
-
     if output_file_path is not None:
         await asyncio.get_event_loop().run_in_executor(
-            None, write_to_file, output_file_path, img_bytes
+            None, Path(output_file_path).write_bytes, img_bytes
         )
 
     return img_bytes
@@ -337,8 +334,7 @@ def _render_mermaid_using_api(
     if response.status_code == 200:
         img_bytes = response.content
         if output_file_path is not None:
-            with open(output_file_path, "wb") as file:
+            Path(output_file_path).write_bytes(response.content)
-                file.write(response.content)
 
         return img_bytes
     else:

libs/core/pyproject.toml

@@ -77,7 +77,7 @@ target-version = "py39"
 
 
 [tool.ruff.lint]
-select = [ "ANN", "ASYNC", "B", "C4", "COM", "DJ", "E", "EM", "EXE", "F", "FLY", "FURB", "I", "ICN", "INT", "LOG", "N", "NPY", "PD", "PIE", "Q", "RSE", "S", "SIM", "SLOT", "T10", "T201", "TC", "TID", "TRY", "UP", "W", "YTT",]
+select = [ "ANN", "ASYNC", "B", "C4", "COM", "DJ", "E", "EM", "EXE", "F", "FLY", "FURB", "I", "ICN", "INT", "LOG", "N", "NPY", "PD", "PIE", "PTH", "Q", "RSE", "S", "SIM", "SLOT", "T10", "T201", "TC", "TID", "TRY", "UP", "W", "YTT",]
 ignore = [ "ANN401", "COM812", "UP007", "S110", "S112", "TC001", "TC002", "TC003"]
 flake8-type-checking.runtime-evaluated-base-classes = ["pydantic.BaseModel","langchain_core.load.serializable.Serializable","langchain_core.runnables.base.RunnableSerializable"]
 flake8-annotations.allow-star-arg-any = true

libs/core/tests/unit_tests/prompts/test_prompt.py

@@ -354,7 +354,7 @@ def test_prompt_from_file_with_partial_variables() -> None:
     template = "This is a {foo} test {bar}."
     partial_variables = {"bar": "baz"}
     # when
-    with mock.patch("builtins.open", mock.mock_open(read_data=template)):
+    with mock.patch("pathlib.Path.open", mock.mock_open(read_data=template)):
         prompt = PromptTemplate.from_file(
             "mock_file_name", partial_variables=partial_variables
         )

libs/core/tests/unit_tests/test_imports.py

@@ -1,20 +1,17 @@
 import concurrent.futures
-import glob
 import importlib
 import subprocess
 from pathlib import Path
 
 
 def test_importable_all() -> None:
-    for path in glob.glob("../core/langchain_core/*"):
+    for path in Path("../core/langchain_core/").glob("*"):
-        relative_path = Path(path).parts[-1]
+        module_name = path.stem
-        if relative_path.endswith(".typed"):
+        if not module_name.startswith(".") and path.suffix != ".typed":
-            continue
+            module = importlib.import_module("langchain_core." + module_name)
-        module_name = relative_path.split(".")[0]
+            all_ = getattr(module, "__all__", [])
-        module = importlib.import_module("langchain_core." + module_name)
+            for cls_ in all_:
-        all_ = getattr(module, "__all__", [])
+                getattr(module, cls_)
-        for cls_ in all_:
-            getattr(module, cls_)
 
 
 def try_to_import(module_name: str) -> tuple[int, str]:
@@ -37,12 +34,10 @@ def test_importable_all_via_subprocess() -> None:
           for one sequence of imports but not another.
     """
     module_names = []
-    for path in glob.glob("../core/langchain_core/*"):
+    for path in Path("../core/langchain_core/").glob("*"):
-        relative_path = Path(path).parts[-1]
+        module_name = path.stem
-        if relative_path.endswith(".typed"):
+        if not module_name.startswith(".") and path.suffix != ".typed":
-            continue
+            module_names.append(module_name)
-        module_name = relative_path.split(".")[0]
-        module_names.append(module_name)
 
     with concurrent.futures.ThreadPoolExecutor(max_workers=10) as executor:
         futures = [

libs/partners/anthropic/langchain_anthropic/chat_models.py

@@ -26,6 +26,7 @@ from langchain_core.callbacks import (
     AsyncCallbackManagerForLLMRun,
     CallbackManagerForLLMRun,
 )
+from langchain_core.exceptions import OutputParserException
 from langchain_core.language_models import LanguageModelInput
 from langchain_core.language_models.chat_models import (
     BaseChatModel,
@@ -83,6 +84,15 @@ _message_type_lookups = {
 }
 
 
+class AnthropicTool(TypedDict):
+    """Anthropic tool definition."""
+
+    name: str
+    description: str
+    input_schema: Dict[str, Any]
+    cache_control: NotRequired[Dict[str, str]]
+
+
 def _format_image(image_url: str) -> Dict:
     """
     Formats an image of format data:image/jpeg;base64,{b64_string}
@@ -900,6 +910,8 @@ class ChatAnthropic(BaseChatModel):
         llm_output = {
             k: v for k, v in data_dict.items() if k not in ("content", "role", "type")
         }
+        if "model" in llm_output and "model_name" not in llm_output:
+            llm_output["model_name"] = llm_output["model"]
         if (
             len(content) == 1
             and content[0]["type"] == "text"
@@ -952,6 +964,31 @@ class ChatAnthropic(BaseChatModel):
         data = await self._async_client.messages.create(**payload)
         return self._format_output(data, **kwargs)
 
+    def _get_llm_for_structured_output_when_thinking_is_enabled(
+        self,
+        schema: Union[Dict, type],
+        formatted_tool: AnthropicTool,
+    ) -> Runnable[LanguageModelInput, BaseMessage]:
+        thinking_admonition = (
+            "Anthropic structured output relies on forced tool calling, "
+            "which is not supported when `thinking` is enabled. This method will raise "
+            "langchain_core.exceptions.OutputParserException if tool calls are not "
+            "generated. Consider disabling `thinking` or adjust your prompt to ensure "
+            "the tool is called."
+        )
+        warnings.warn(thinking_admonition)
+        llm = self.bind_tools(
+            [schema],
+            structured_output_format={"kwargs": {}, "schema": formatted_tool},
+        )
+
+        def _raise_if_no_tool_calls(message: AIMessage) -> AIMessage:
+            if not message.tool_calls:
+                raise OutputParserException(thinking_admonition)
+            return message
+
+        return llm | _raise_if_no_tool_calls
+
     def bind_tools(
         self,
         tools: Sequence[Union[Dict[str, Any], Type, Callable, BaseTool]],
@@ -1249,11 +1286,17 @@ class ChatAnthropic(BaseChatModel):
         """  # noqa: E501
         formatted_tool = convert_to_anthropic_tool(schema)
         tool_name = formatted_tool["name"]
-        llm = self.bind_tools(
+        if self.thinking is not None and self.thinking.get("type") == "enabled":
-            [schema],
+            llm = self._get_llm_for_structured_output_when_thinking_is_enabled(
-            tool_choice=tool_name,
+                schema, formatted_tool
-            structured_output_format={"kwargs": {}, "schema": formatted_tool},
+            )
-        )
+        else:
+            llm = self.bind_tools(
+                [schema],
+                tool_choice=tool_name,
+                structured_output_format={"kwargs": {}, "schema": formatted_tool},
+            )
+
         if isinstance(schema, type) and is_basemodel_subclass(schema):
             output_parser: OutputParserLike = PydanticToolsParser(
                 tools=[schema], first_tool_only=True
@@ -1356,15 +1399,6 @@ class ChatAnthropic(BaseChatModel):
         return response.input_tokens
 
 
-class AnthropicTool(TypedDict):
-    """Anthropic tool definition."""
-
-    name: str
-    description: str
-    input_schema: Dict[str, Any]
-    cache_control: NotRequired[Dict[str, str]]
-
-
 def convert_to_anthropic_tool(
     tool: Union[Dict[str, Any], Type, Callable, BaseTool],
 ) -> AnthropicTool:
@@ -1445,9 +1479,14 @@ def _make_message_chunk_from_anthropic_event(
     # See https://github.com/anthropics/anthropic-sdk-python/blob/main/src/anthropic/lib/streaming/_messages.py  # noqa: E501
     if event.type == "message_start" and stream_usage:
         usage_metadata = _create_usage_metadata(event.message.usage)
+        if hasattr(event.message, "model"):
+            response_metadata = {"model_name": event.message.model}
+        else:
+            response_metadata = {}
         message_chunk = AIMessageChunk(
             content="" if coerce_content_to_string else [],
             usage_metadata=usage_metadata,
+            response_metadata=response_metadata,
         )
     elif (
         event.type == "content_block_start"

libs/partners/anthropic/tests/integration_tests/test_chat_models.py

@@ -6,7 +6,9 @@ from typing import List, Optional
 
 import pytest
 import requests
+from anthropic import BadRequestError
 from langchain_core.callbacks import CallbackManager
+from langchain_core.exceptions import OutputParserException
 from langchain_core.messages import (
     AIMessage,
     AIMessageChunk,
@@ -35,6 +37,7 @@ def test_stream() -> None:
     full: Optional[BaseMessageChunk] = None
     chunks_with_input_token_counts = 0
     chunks_with_output_token_counts = 0
+    chunks_with_model_name = 0
     for token in llm.stream("I'm Pickle Rick"):
         assert isinstance(token.content, str)
         full = token if full is None else full + token
@@ -44,12 +47,14 @@ def test_stream() -> None:
                 chunks_with_input_token_counts += 1
             elif token.usage_metadata.get("output_tokens"):
                 chunks_with_output_token_counts += 1
+        chunks_with_model_name += int("model_name" in token.response_metadata)
     if chunks_with_input_token_counts != 1 or chunks_with_output_token_counts != 1:
         raise AssertionError(
             "Expected exactly one chunk with input or output token counts. "
             "AIMessageChunk aggregation adds counts. Check that "
             "this is behaving properly."
         )
+    assert chunks_with_model_name == 1
     # check token usage is populated
     assert isinstance(full, AIMessageChunk)
     assert full.usage_metadata is not None
@@ -62,6 +67,7 @@ def test_stream() -> None:
     )
     assert "stop_reason" in full.response_metadata
     assert "stop_sequence" in full.response_metadata
+    assert "model_name" in full.response_metadata
 
 
 async def test_astream() -> None:
@@ -219,6 +225,7 @@ async def test_ainvoke() -> None:
 
     result = await llm.ainvoke("I'm Pickle Rick", config={"tags": ["foo"]})
     assert isinstance(result.content, str)
+    assert "model_name" in result.response_metadata
 
 
 def test_invoke() -> None:
@@ -725,3 +732,39 @@ def test_redacted_thinking() -> None:
             assert set(block.keys()) == {"type", "data", "index"}
             assert block["data"] and isinstance(block["data"], str)
     assert stream_has_reasoning
+
+
+def test_structured_output_thinking_enabled() -> None:
+    llm = ChatAnthropic(
+        model="claude-3-7-sonnet-latest",
+        max_tokens=5_000,
+        thinking={"type": "enabled", "budget_tokens": 2_000},
+    )
+    with pytest.warns(match="structured output"):
+        structured_llm = llm.with_structured_output(GenerateUsername)
+    query = "Generate a username for Sally with green hair"
+    response = structured_llm.invoke(query)
+    assert isinstance(response, GenerateUsername)
+
+    with pytest.raises(OutputParserException):
+        structured_llm.invoke("Hello")
+
+    # Test streaming
+    for chunk in structured_llm.stream(query):
+        assert isinstance(chunk, GenerateUsername)
+
+
+def test_structured_output_thinking_force_tool_use() -> None:
+    # Structured output currently relies on forced tool use, which is not supported
+    # when `thinking` is enabled. When this test fails, it means that the feature
+    # is supported and the workarounds in `with_structured_output` should be removed.
+    llm = ChatAnthropic(
+        model="claude-3-7-sonnet-latest",
+        max_tokens=5_000,
+        thinking={"type": "enabled", "budget_tokens": 2_000},
+    ).bind_tools(
+        [GenerateUsername],
+        tool_choice="GenerateUsername",
+    )
+    with pytest.raises(BadRequestError):
+        llm.invoke("Generate a username for Sally with green hair")

libs/partners/mistralai/langchain_mistralai/chat_models.py

@@ -579,7 +579,11 @@ class ChatMistralAI(BaseChatModel):
             )
             generations.append(gen)
 
-        llm_output = {"token_usage": token_usage, "model": self.model}
+        llm_output = {
+            "token_usage": token_usage,
+            "model_name": self.model,
+            "model": self.model,  # Backwards compatability
+        }
         return ChatResult(generations=generations, llm_output=llm_output)
 
     def _create_message_dicts(

libs/partners/mistralai/tests/integration_tests/test_chat_models.py

@@ -87,6 +87,7 @@ async def test_ainvoke() -> None:
 
     result = await llm.ainvoke("I'm Pickle Rick", config={"tags": ["foo"]})
     assert isinstance(result.content, str)
+    assert "model_name" in result.response_metadata
 
 
 def test_invoke() -> None: