docs(anthropic): update documentation links (#32938)

**Description:**
This PR updated links to the latest Anthropic documentation. Changes
include revised links for model overview, tool usage, web search tool,
text editor tool, and more.

**Issue:**
N/A

**Dependencies:**
None

**Twitter handle:**
N/A

docs/docs/integrations/chat/anthropic.ipynb

@@ -19,7 +19,7 @@
     "\n",
     "This notebook provides a quick overview for getting started with Anthropic [chat models](/docs/concepts/chat_models). For detailed documentation of all ChatAnthropic features and configurations head to the [API reference](https://python.langchain.com/api_reference/anthropic/chat_models/langchain_anthropic.chat_models.ChatAnthropic.html).\n",
     "\n",
-    "Anthropic has several chat models. You can find information about their latest models and their costs, context windows, and supported input types in the [Anthropic docs](https://docs.anthropic.com/en/docs/models-overview).\n",
+    "Anthropic has several chat models. You can find information about their latest models and their costs, context windows, and supported input types in the [Anthropic docs](https://docs.anthropic.com/en/docs/about-claude/models/overview).\n",
     "\n",
     "\n",
     ":::info AWS Bedrock and Google VertexAI\n",
@@ -840,7 +840,7 @@
    "source": [
     "## Token-efficient tool use\n",
     "\n",
-    "Anthropic supports a (beta) [token-efficient tool use](https://docs.anthropic.com/en/docs/build-with-claude/tool-use/token-efficient-tool-use) feature. To use it, specify the relevant beta-headers when instantiating the model."
+    "Anthropic supports a (beta) [token-efficient tool use](https://docs.anthropic.com/en/docs/agents-and-tools/tool-use/token-efficient-tool-use) feature. To use it, specify the relevant beta-headers when instantiating the model."
    ]
   },
   {
@@ -1198,7 +1198,7 @@
    "source": [
     "## Built-in tools\n",
     "\n",
-    "Anthropic supports a variety of [built-in tools](https://docs.anthropic.com/en/docs/build-with-claude/tool-use/text-editor-tool), which can be bound to the model in the [usual way](/docs/how_to/tool_calling/). Claude will generate tool calls adhering to its internal schema for the tool:"
+    "Anthropic supports a variety of [built-in tools](https://docs.anthropic.com/en/docs/agents-and-tools/tool-use/text-editor-tool), which can be bound to the model in the [usual way](/docs/how_to/tool_calling/). Claude will generate tool calls adhering to its internal schema for the tool:"
    ]
   },
   {
@@ -1208,7 +1208,7 @@
    "source": [
     "### Web search\n",
     "\n",
-    "Claude can use a [web search tool](https://docs.anthropic.com/en/docs/build-with-claude/tool-use/web-search-tool) to run searches and ground its responses with citations."
+    "Claude can use a [web search tool](https://docs.anthropic.com/en/docs/agents-and-tools/tool-use/web-search-tool) to run searches and ground its responses with citations."
    ]
   },
   {
@@ -1522,7 +1522,7 @@
    "source": [
     "### Text editor\n",
     "\n",
-    "The text editor tool can be used to view and modify text files. See docs [here](https://docs.anthropic.com/en/docs/build-with-claude/tool-use/text-editor-tool) for details."
+    "The text editor tool can be used to view and modify text files. See docs [here](https://docs.anthropic.com/en/docs/agents-and-tools/tool-use/text-editor-tool) for details."
    ]
   },
   {

docs/src/theme/ChatModelTabs.js

@@ -119,7 +119,7 @@ export default function ChatModelTabs(props) {
       value: "anthropic",
       label: "Anthropic",
       model: "claude-3-7-sonnet-20250219",
-      comment: "# Note: Model versions may become outdated. Check https://docs.anthropic.com/en/docs/models-overview for latest versions",
+      comment: "# Note: Model versions may become outdated. Check https://docs.anthropic.com/en/docs/about-claude/models/overview for latest versions",
       apiKeyName: "ANTHROPIC_API_KEY",
       packageName: "langchain[anthropic]",
     },

libs/partners/anthropic/langchain_anthropic/chat_models.py

@@ -502,7 +502,7 @@ def _handle_anthropic_bad_request(e: anthropic.BadRequestError) -> None:
 class ChatAnthropic(BaseChatModel):
     """Anthropic chat models.
 
-    See `Anthropic's docs <https://docs.anthropic.com/en/docs/models-overview>`__ for a
+    See `Anthropic's docs <https://docs.anthropic.com/en/docs/about-claude/models/overview>`__ for a
     list of the latest models.
 
     Setup:

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

@@ -462,7 +462,7 @@ def test_tool_use() -> None:
     assert tool_call["id"] is not None
 
     # Testing token-efficient tools
-    # https://docs.anthropic.com/en/docs/build-with-claude/tool-use/token-efficient-tool-use
+    # https://docs.anthropic.com/en/docs/agents-and-tools/tool-use/token-efficient-tool-use
     assert gathered.usage_metadata
     assert response.usage_metadata
     assert (