diff --git a/homeassistant/components/anthropic/config_flow.py b/homeassistant/components/anthropic/config_flow.py
index a59078cf31a..58cb720c5a5 100644
--- a/homeassistant/components/anthropic/config_flow.py
+++ b/homeassistant/components/anthropic/config_flow.py
@@ -419,7 +419,11 @@ class ConversationSubentryFlowHandler(ConfigSubentryFlow):
             model_alias = (
                 model_info.id[:-9]
                 if model_info.id
-                not in ("claude-3-haiku-20240307", "claude-3-opus-20240229")
+                not in (
+                    "claude-3-haiku-20240307",
+                    "claude-3-5-haiku-20241022",
+                    "claude-3-opus-20240229",
+                )
                 else model_info.id
             )
             if short_form.search(model_alias):
diff --git a/homeassistant/components/anthropic/const.py b/homeassistant/components/anthropic/const.py
index 4b65652ade0..ff89fdde905 100644
--- a/homeassistant/components/anthropic/const.py
+++ b/homeassistant/components/anthropic/const.py
@@ -23,7 +23,7 @@ CONF_WEB_SEARCH_COUNTRY = "country"
 CONF_WEB_SEARCH_TIMEZONE = "timezone"
 
 DEFAULT = {
-    CONF_CHAT_MODEL: "claude-3-5-haiku-latest",
+    CONF_CHAT_MODEL: "claude-haiku-4-5",
     CONF_MAX_TOKENS: 3000,
     CONF_TEMPERATURE: 1.0,
     CONF_THINKING_BUDGET: 0,
diff --git a/tests/components/anthropic/test_config_flow.py b/tests/components/anthropic/test_config_flow.py
index b6935c4a184..867a2ae284f 100644
--- a/tests/components/anthropic/test_config_flow.py
+++ b/tests/components/anthropic/test_config_flow.py
@@ -387,7 +387,7 @@ async def test_model_list(
         },
         {
             "label": "Claude Haiku 3.5",
-            "value": "claude-3-5-haiku-latest",
+            "value": "claude-3-5-haiku-20241022",
         },
         {
             "label": "Claude Haiku 3",
@@ -500,7 +500,7 @@ async def test_model_list_error(
                     CONF_LLM_HASS_API: [],
                 },
                 {
-                    CONF_CHAT_MODEL: "claude-3-5-haiku-latest",
+                    CONF_CHAT_MODEL: "claude-3-5-haiku-20241022",
                     CONF_TEMPERATURE: 1.0,
                 },
                 {
@@ -513,7 +513,7 @@ async def test_model_list_error(
                 CONF_RECOMMENDED: False,
                 CONF_PROMPT: "Speak like a pirate",
                 CONF_TEMPERATURE: 1.0,
-                CONF_CHAT_MODEL: "claude-3-5-haiku-latest",
+                CONF_CHAT_MODEL: "claude-3-5-haiku-20241022",
                 CONF_MAX_TOKENS: DEFAULT[CONF_MAX_TOKENS],
                 CONF_WEB_SEARCH: False,
                 CONF_WEB_SEARCH_MAX_USES: 10,
@@ -581,6 +581,7 @@ async def test_model_list_error(
                 CONF_TEMPERATURE: 0.3,
                 CONF_CHAT_MODEL: DEFAULT[CONF_CHAT_MODEL],
                 CONF_MAX_TOKENS: DEFAULT[CONF_MAX_TOKENS],
+                CONF_THINKING_BUDGET: 0,
                 CONF_WEB_SEARCH: False,
                 CONF_WEB_SEARCH_MAX_USES: 5,
                 CONF_WEB_SEARCH_USER_LOCATION: False,