diff --git a/homeassistant/components/anthropic/entity.py b/homeassistant/components/anthropic/entity.py
index fcefcbb50a5..1714ab7b1ac 100644
--- a/homeassistant/components/anthropic/entity.py
+++ b/homeassistant/components/anthropic/entity.py
@@ -392,7 +392,7 @@ async def _transform_stream(  # noqa: C901 - This is complex, but better to have
                     type="tool_use",
                     id=response.content_block.id,
                     name=response.content_block.name,
-                    input="",
+                    input={},
                 )
                 current_tool_args = ""
                 if response.content_block.name == output_tool:
@@ -459,7 +459,7 @@ async def _transform_stream(  # noqa: C901 - This is complex, but better to have
                     type="server_tool_use",
                     id=response.content_block.id,
                     name=response.content_block.name,
-                    input="",
+                    input={},
                 )
                 current_tool_args = ""
             elif isinstance(response.content_block, WebSearchToolResultBlock):
diff --git a/homeassistant/components/anthropic/manifest.json b/homeassistant/components/anthropic/manifest.json
index a0991f42fdb..bb24dfbd397 100644
--- a/homeassistant/components/anthropic/manifest.json
+++ b/homeassistant/components/anthropic/manifest.json
@@ -8,5 +8,5 @@
   "documentation": "https://www.home-assistant.io/integrations/anthropic",
   "integration_type": "service",
   "iot_class": "cloud_polling",
-  "requirements": ["anthropic==0.69.0"]
+  "requirements": ["anthropic==0.73.0"]
 }
diff --git a/requirements_all.txt b/requirements_all.txt
index 0a850f22dc1..2451f03c173 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -500,7 +500,7 @@ anova-wifi==0.17.0
 anthemav==1.4.1
 
 # homeassistant.components.anthropic
-anthropic==0.69.0
+anthropic==0.73.0
 
 # homeassistant.components.mcp_server
 anyio==4.10.0
diff --git a/requirements_test_all.txt b/requirements_test_all.txt
index f8c3127dd12..22ab8d69e67 100644
--- a/requirements_test_all.txt
+++ b/requirements_test_all.txt
@@ -473,7 +473,7 @@ anova-wifi==0.17.0
 anthemav==1.4.1
 
 # homeassistant.components.anthropic
-anthropic==0.69.0
+anthropic==0.73.0
 
 # homeassistant.components.mcp_server
 anyio==4.10.0