For audio output, listen for`audio` events and play the audio data through your preferred audio library. Make sure to listen for`audio_interrupted` events to stop playback immediately and clear any queued audio when the user interrupts the agent.

You can attach realtime agents to phone calls that arrive via the[Realtime Calls API](https://platform.openai.com/docs/guides/realtime-sip). The SDK provides[`OpenAIRealtimeSIPModel`][agents.realtime.openai_realtime.OpenAIRealtimeSIPModel], which reuses the same agent flow while negotiating media over SIP.

To use it, pass the model instance to the runner and supply the SIP`call_id` when starting the session. The call ID is delivered by the webhook that signals an incoming call.

from agents.realtimeimport RealtimeAgent, RealtimeRunner

from agents.realtime.openai_realtimeimport OpenAIRealtimeSIPModel

runner= RealtimeRunner(

starting_agent=agent,

model=OpenAIRealtimeSIPModel(),

)

asyncwithawait runner.run(

model_config={

"call_id": call_id_from_webhook,

"initial_model_settings": {

"turn_detection": {"type":"semantic_vad","interrupt_response":True},

},

},

)as session:

asyncfor eventin session:

When the caller hangs up, the SIP session ends and the realtime connection closes automatically. For a complete telephony example, see[`examples/realtime/twilio_sip`](https://github.com/openai/openai-agents-python/tree/main/examples/realtime/twilio_sip).

You can access the underlying model to add custom listeners or perform advanced operations:

This version doesn’t introduce any visible breaking changes, but it includes new features and a few significant updates under the hood:

- Added support for`RealtimeRunner` to handle[SIP protocol connections](https://platform.openai.com/docs/guides/realtime-sip)

- Significantly revised the internal logic of`Runner#run_sync` for Python 3.14 compatibility

In this version,[openai](https://pypi.org/project/openai/) package v1.x versions are no longer supported. Please use openai v2.x along with this SDK.