docs: document Anthropic cache TTL count details (#31708)

docs/docs/integrations/chat/anthropic.ipynb

@@ -568,6 +568,26 @@
     "    ```\n",
     "    and specifying `\"cache_control\": {\"type\": \"ephemeral\", \"ttl\": \"1h\"}`.\n",
     "\n",
+    "    Details of cached token counts will be included on the `InputTokenDetails` of response's `usage_metadata`:\n",
+    "\n",
+    "    ```python\n",
+    "    response = llm.invoke(messages)\n",
+    "    response.usage_metadata\n",
+    "    ```\n",
+    "    ```\n",
+    "    {\n",
+    "        \"input_tokens\": 1500,\n",
+    "        \"output_tokens\": 200,\n",
+    "        \"total_tokens\": 1700,\n",
+    "        \"input_token_details\": {\n",
+    "            \"cache_read\": 0,\n",
+    "            \"cache_creation\": 1000,\n",
+    "            \"ephemeral_1h_input_tokens\": 750,\n",
+    "            \"ephemeral_5m_input_tokens\": 250,\n",
+    "        }\n",
+    "    }\n",
+    "    ```\n",
+    "\n",
     ":::"
    ]
   },

libs/core/langchain_core/messages/ai.py

@@ -55,6 +55,8 @@ class InputTokenDetails(TypedDict, total=False):
             }
 
     .. versionadded:: 0.3.9
+
+    May also hold extra provider-specific keys.
     """
 
     audio: int

libs/core/tests/unit_tests/prompts/__snapshots__/test_chat.ambr

@@ -702,6 +702,8 @@
                   }
           
           .. versionadded:: 0.3.9
+          
+          May also hold extra provider-specific keys.
         ''',
         'properties': dict({
           'audio': dict({
@@ -2132,6 +2134,8 @@
                   }
           
           .. versionadded:: 0.3.9
+          
+          May also hold extra provider-specific keys.
         ''',
         'properties': dict({
           'audio': dict({

libs/core/tests/unit_tests/runnables/__snapshots__/test_graph.ambr

@@ -1105,6 +1105,8 @@
                         }
                 
                 .. versionadded:: 0.3.9
+                
+                May also hold extra provider-specific keys.
               ''',
               'properties': dict({
                 'audio': dict({

libs/core/tests/unit_tests/runnables/__snapshots__/test_runnable.ambr

@@ -2650,6 +2650,8 @@
                   }
           
           .. versionadded:: 0.3.9
+          
+          May also hold extra provider-specific keys.
         ''',
         'properties': dict({
           'audio': dict({
@@ -4124,6 +4126,8 @@
                   }
           
           .. versionadded:: 0.3.9
+          
+          May also hold extra provider-specific keys.
         ''',
         'properties': dict({
           'audio': dict({
@@ -5629,6 +5633,8 @@
                   }
           
           .. versionadded:: 0.3.9
+          
+          May also hold extra provider-specific keys.
         ''',
         'properties': dict({
           'audio': dict({
@@ -7009,6 +7015,8 @@
                   }
           
           .. versionadded:: 0.3.9
+          
+          May also hold extra provider-specific keys.
         ''',
         'properties': dict({
           'audio': dict({
@@ -8525,6 +8533,8 @@
                   }
           
           .. versionadded:: 0.3.9
+          
+          May also hold extra provider-specific keys.
         ''',
         'properties': dict({
           'audio': dict({
@@ -9950,6 +9960,8 @@
                   }
           
           .. versionadded:: 0.3.9
+          
+          May also hold extra provider-specific keys.
         ''',
         'properties': dict({
           'audio': dict({
@@ -11374,6 +11386,8 @@
                   }
           
           .. versionadded:: 0.3.9
+          
+          May also hold extra provider-specific keys.
         ''',
         'properties': dict({
           'audio': dict({
@@ -12840,6 +12854,8 @@
                   }
           
           .. versionadded:: 0.3.9
+          
+          May also hold extra provider-specific keys.
         ''',
         'properties': dict({
           'audio': dict({

libs/partners/anthropic/langchain_anthropic/chat_models.py

@@ -955,6 +955,8 @@ class ChatAnthropic(BaseChatModel):
 
         .. dropdown:: Extended caching
 
+            .. versionadded:: 0.3.15
+
             The cache lifetime is 5 minutes by default. If this is too short, you can
             apply one hour caching by enabling the ``"extended-cache-ttl-2025-04-11"``
             beta header:
@@ -968,6 +970,28 @@ class ChatAnthropic(BaseChatModel):
 
             and specifying ``"cache_control": {"type": "ephemeral", "ttl": "1h"}``.
 
+            Details of cached token counts will be included on the ``InputTokenDetails``
+            of response's ``usage_metadata``:
+
+            .. code-block:: python
+
+                response = llm.invoke(messages)
+                response.usage_metadata
+
+            .. code-block:: python
+
+                {
+                    "input_tokens": 1500,
+                    "output_tokens": 200,
+                    "total_tokens": 1700,
+                    "input_token_details": {
+                        "cache_read": 0,
+                        "cache_creation": 1000,
+                        "ephemeral_1h_input_tokens": 750,
+                        "ephemeral_5m_input_tokens": 250,
+                    }
+                }
+
             See `Claude documentation <https://docs.anthropic.com/en/docs/build-with-claude/prompt-caching#1-hour-cache-duration-beta>`_
             for detail.