diff --git a/homeassistant/components/openai_conversation/const.py b/homeassistant/components/openai_conversation/const.py
index a5a5f9723ca..3ba488d87db 100644
--- a/homeassistant/components/openai_conversation/const.py
+++ b/homeassistant/components/openai_conversation/const.py
@@ -88,6 +88,7 @@ UNSUPPORTED_EXTENDED_CACHE_RETENTION_MODELS: list[str] = [
     "o4",
     "gpt-3.5",
     "gpt-4-turbo",
+    "gpt-4o",
     "gpt-5-mini",
     "gpt-5-nano",
 ]