diff --git a/changelog/3795.fixed.md b/changelog/3795.fixed.md
new file mode 100644
index 000000000..8c231abac
--- /dev/null
+++ b/changelog/3795.fixed.md
@@ -0,0 +1 @@
+- Treated `response_cancel_not_active` as a non-fatal error in realtime services (`OpenAIRealtimeLLMService`, `GrokRealtimeLLMService`, `OpenAIRealtimeBetaLLMService`) to prevent WebSocket disconnection when cancelling an inactive response.
\ No newline at end of file
diff --git a/src/pipecat/services/grok/realtime/llm.py b/src/pipecat/services/grok/realtime/llm.py
index c522c6c6f..6d148f6d7 100644
--- a/src/pipecat/services/grok/realtime/llm.py
+++ b/src/pipecat/services/grok/realtime/llm.py
@@ -571,8 +571,11 @@ class GrokRealtimeLLMService(LLMService):
             elif evt.type == "response.function_call_arguments.done":
                 await self._handle_evt_function_call_arguments_done(evt)
             elif evt.type == "error":
-                await self._handle_evt_error(evt)
-                return
+                if evt.error.code == "response_cancel_not_active":
+                    logger.debug(f"{self} {evt.error.message}")
+                else:
+                    await self._handle_evt_error(evt)
+                    return
 
     async def _handle_evt_conversation_created(self, evt):
         """Handle conversation.created event - first event after connecting."""
diff --git a/src/pipecat/services/openai/realtime/llm.py b/src/pipecat/services/openai/realtime/llm.py
index 6665a9a75..a6667c7c8 100644
--- a/src/pipecat/services/openai/realtime/llm.py
+++ b/src/pipecat/services/openai/realtime/llm.py
@@ -618,9 +618,12 @@ class OpenAIRealtimeLLMService(LLMService):
                 await self._handle_evt_function_call_arguments_done(evt)
             elif evt.type == "error":
                 if not await self._maybe_handle_evt_retrieve_conversation_item_error(evt):
-                    await self._handle_evt_error(evt)
-                    # errors are fatal, so exit the receive loop
-                    return
+                    if evt.error.code == "response_cancel_not_active":
+                        logger.debug(f"{self} {evt.error.message}")
+                    else:
+                        await self._handle_evt_error(evt)
+                        # errors are fatal, so exit the receive loop
+                        return
 
     @traced_openai_realtime(operation="llm_setup")
     async def _handle_evt_session_created(self, evt):
diff --git a/src/pipecat/services/openai_realtime_beta/openai.py b/src/pipecat/services/openai_realtime_beta/openai.py
index 983cd10df..8614713ff 100644
--- a/src/pipecat/services/openai_realtime_beta/openai.py
+++ b/src/pipecat/services/openai_realtime_beta/openai.py
@@ -544,9 +544,12 @@ class OpenAIRealtimeBetaLLMService(LLMService):
                 await self._handle_evt_audio_transcript_delta(evt)
             elif evt.type == "error":
                 if not await self._maybe_handle_evt_retrieve_conversation_item_error(evt):
-                    await self._handle_evt_error(evt)
-                    # errors are fatal, so exit the receive loop
-                    return
+                    if evt.error.code == "response_cancel_not_active":
+                        logger.debug(f"{self} {evt.error.message}")
+                    else:
+                        await self._handle_evt_error(evt)
+                        # errors are fatal, so exit the receive loop
+                        return
 
     @traced_openai_realtime(operation="llm_setup")
     async def _handle_evt_session_created(self, evt):