diff --git a/homeassistant/components/anthropic/const.py b/homeassistant/components/anthropic/const.py
index 356140ff66e..395f7fa8a81 100644
--- a/homeassistant/components/anthropic/const.py
+++ b/homeassistant/components/anthropic/const.py
@@ -19,9 +19,8 @@ CONF_THINKING_BUDGET = "thinking_budget"
 RECOMMENDED_THINKING_BUDGET = 0
 MIN_THINKING_BUDGET = 1024
 
-THINKING_MODELS = [
-    "claude-3-7-sonnet",
-    "claude-sonnet-4-0",
-    "claude-opus-4-0",
-    "claude-opus-4-1",
+NON_THINKING_MODELS = [
+    "claude-3-5",  # Both sonnet and haiku
+    "claude-3-opus",
+    "claude-3-haiku",
 ]
diff --git a/homeassistant/components/anthropic/entity.py b/homeassistant/components/anthropic/entity.py
index 7338cbe2906..7c58326515e 100644
--- a/homeassistant/components/anthropic/entity.py
+++ b/homeassistant/components/anthropic/entity.py
@@ -51,11 +51,11 @@ from .const import (
     DOMAIN,
     LOGGER,
     MIN_THINKING_BUDGET,
+    NON_THINKING_MODELS,
     RECOMMENDED_CHAT_MODEL,
     RECOMMENDED_MAX_TOKENS,
     RECOMMENDED_TEMPERATURE,
     RECOMMENDED_THINKING_BUDGET,
-    THINKING_MODELS,
 )
 
 # Max number of back and forth with the LLM to generate a response
@@ -364,7 +364,7 @@ class AnthropicBaseLLMEntity(Entity):
         if tools:
             model_args["tools"] = tools
         if (
-            model.startswith(tuple(THINKING_MODELS))
+            not model.startswith(tuple(NON_THINKING_MODELS))
             and thinking_budget >= MIN_THINKING_BUDGET
         ):
             model_args["thinking"] = ThinkingConfigEnabledParam(