Update Realtime Agent documents (ref #1646)

Author: seratch

docs/realtime/guide.md

@@ -48,7 +48,7 @@ Key differences from regular agents:
 
 ### Model settings
 
-The session configuration allows you to control the underlying realtime model behavior. You can configure the model name (such as `gpt-4o-realtime-preview`), voice selection (alloy, echo, fable, onyx, nova, shimmer), and supported modalities (text and/or audio). Audio formats can be set for both input and output, with PCM16 being the default.
+The session configuration allows you to control the underlying realtime model behavior. You can configure the model name (such as `gpt-realtime`), voice selection (alloy, echo, fable, onyx, nova, shimmer), and supported modalities (text and/or audio). Audio formats can be set for both input and output, with PCM16 being the default.
 
 ### Audio configuration
 

docs/realtime/quickstart.md

@@ -44,7 +44,7 @@ runner = RealtimeRunner(
     starting_agent=agent,
     config={
         "model_settings": {
-            "model_name": "gpt-4o-realtime-preview",
+            "model_name": "gpt-realtime",
             "voice": "alloy",
             "modalities": ["text", "audio"],
         }
@@ -95,7 +95,7 @@ async def main():
         starting_agent=agent,
         config={
             "model_settings": {
-                "model_name": "gpt-4o-realtime-preview",
+                "model_name": "gpt-realtime",
                 "voice": "alloy",
                 "modalities": ["text", "audio"],
                 "input_audio_transcription": {
@@ -135,7 +135,7 @@ if __name__ == "__main__":
 
 ### Model settings
 
--   `model_name`: Choose from available realtime models (e.g., `gpt-4o-realtime-preview`)
+-   `model_name`: Choose from available realtime models (e.g., `gpt-realtime`)
 -   `voice`: Select voice (`alloy`, `echo`, `fable`, `onyx`, `nova`, `shimmer`)
 -   `modalities`: Enable text and/or audio (`["text", "audio"]`)