diff --git a/homeassistant/components/openai_conversation/entity.py b/homeassistant/components/openai_conversation/entity.py
index b5d303ed7659..8cef9f0d5901 100644
--- a/homeassistant/components/openai_conversation/entity.py
+++ b/homeassistant/components/openai_conversation/entity.py
@@ -557,7 +557,6 @@ class OpenAIBaseLLMEntity(Entity):
                 reasoning["mode"] = "pro"
 
             model_args["reasoning"] = reasoning
-            model_args["include"] = ["reasoning.encrypted_content"]
 
         if (
             not model_args["model"].startswith(("gpt-5", "gpt-6"))
diff --git a/tests/components/openai_conversation/snapshots/test_conversation.ambr b/tests/components/openai_conversation/snapshots/test_conversation.ambr
index 4d6708cbcdb6..b6c08393fa67 100644
--- a/tests/components/openai_conversation/snapshots/test_conversation.ambr
+++ b/tests/components/openai_conversation/snapshots/test_conversation.ambr
@@ -416,9 +416,6 @@
 # ---
 # name: test_model_args[subentry_options1]
   dict({
-    'include': list([
-      'reasoning.encrypted_content',
-    ]),
     'max_output_tokens': 3000,
     'model': 'gpt-5.5',
     'prompt_cache_retention': '24h',
@@ -436,9 +433,6 @@
 # ---
 # name: test_model_args[subentry_options2]
   dict({
-    'include': list([
-      'reasoning.encrypted_content',
-    ]),
     'max_output_tokens': 3000,
     'model': 'gpt-5.6-sol',
     'prompt_cache_options': dict({
@@ -459,9 +453,6 @@
 # ---
 # name: test_model_args[subentry_options3]
   dict({
-    'include': list([
-      'reasoning.encrypted_content',
-    ]),
     'max_output_tokens': 3000,
     'model': 'gpt-5.6-sol',
     'prompt_cache_options': dict({
@@ -483,9 +474,6 @@
 # ---
 # name: test_model_args[subentry_options4]
   dict({
-    'include': list([
-      'reasoning.encrypted_content',
-    ]),
     'max_output_tokens': 3000,
     'model': 'gpt-6-astra',
     'prompt_cache_options': dict({
@@ -505,9 +493,6 @@
 # ---
 # name: test_model_args[subentry_options5]
   dict({
-    'include': list([
-      'reasoning.encrypted_content',
-    ]),
     'max_output_tokens': 3000,
     'model': 'gpt-6-astra',
     'prompt_cache_options': dict({
@@ -528,9 +513,6 @@
 # ---
 # name: test_model_args[subentry_options6]
   dict({
-    'include': list([
-      'reasoning.encrypted_content',
-    ]),
     'max_output_tokens': 3000,
     'model': 'gpt-6-astra',
     'prompt_cache_options': dict({