diff --git a/changelog/3807.changed.md b/changelog/3807.changed.md
new file mode 100644
index 000000000..cc99f29fb
--- /dev/null
+++ b/changelog/3807.changed.md
@@ -0,0 +1 @@
+- Updated `OpenAIRealtimeLLMService` default model to `gpt-realtime-1.5`.
\ No newline at end of file
diff --git a/src/pipecat/services/openai/realtime/llm.py b/src/pipecat/services/openai/realtime/llm.py
index 39c0290fc..a68304fdc 100644
--- a/src/pipecat/services/openai/realtime/llm.py
+++ b/src/pipecat/services/openai/realtime/llm.py
@@ -121,7 +121,7 @@ class OpenAIRealtimeLLMService(LLMService):
         self,
         *,
         api_key: str,
-        model: str = "gpt-realtime",
+        model: str = "gpt-realtime-1.5",
         base_url: str = "wss://api.openai.com/v1/realtime",
         session_properties: Optional[events.SessionProperties] = None,
         start_audio_paused: bool = False,