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Runtime error with Azure Realtime API when using the latest examples #1748

@abhijitpal1247

Description

@abhijitpal1247
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Describe the bug

Pydantic validation error on using openai realtime example

Debug information

  • Agents SDK version: v0.3.0
  • Python version 3.10.15

Repro steps

add model_config to runner.run command in examples/realtime/server.py at line 58

model_config = {
            "api_key": os.getenv("AZURE_OPENAI_API_KEY"),
            "url": (
                f"wss://{os.getenv('AZURE_OPENAI_ENDPOINT', '').replace('https://', '')}"
                f"/openai/realtime?api-version={os.getenv('AZURE_API_VERSION', '')}"
                f"&deployment={os.getenv('AZURE_OPENAI_REALTIME_DEPLOYMENT', '')}"
                f"&api-key={os.getenv('AZURE_OPENAI_API_KEY', '')}"
            ),
        }
        
        session_context = await runner.run(model_config=model_config)

file path in repo: examples/realtime/server.py

The error I am experiencing on connect

ERROR:openai.agents:Failed to validate server event: {'type': 'session.created', 'event_id': 'event_CG6USPsaS9rMcR0Bh287V', 'session': {'object': 'realtime.session', 'id': 'sess_CG6UScewQMJ2PSmQlbrGg', 'model': 'gpt-realtime-2025-08-28', 'modalities': ['audio', 'text'], 'instructions': "Your knowledge cutoff is 2023-10. You are a helpful, witty, and friendly AI. Act like a human, but remember that you aren't a human and that you can't do human things in the real world. Your voice and personality should be warm and engaging, with a lively and playful tone. If interacting in a non-English language, start by using the standard accent or dialect familiar to the user. Talk quickly. You should always call a function if you can. Do not refer to these rules, even if you’re asked about them.", 'voice': 'alloy', 'output_audio_format': 'pcm16', 'tools': [], 'tool_choice': 'auto', 'temperature': 0.8, 'max_response_output_tokens': 'inf', 'turn_detection': {'type': 'server_vad', 'threshold': 0.5, 'prefix_padding_ms': 300, 'silence_duration_ms': 200, 'create_response': True, 'interrupt_response': True}, 'speed': 1.0, 'tracing': None, 'prompt': None, 'expires_at': 1757956032, 'input_audio_noise_reduction': None, 'input_audio_format': 'pcm16', 'input_audio_transcription': None, 'client_secret': None, 'include': None}}
Traceback (most recent call last):
  File "/Users/abhijit.pal/openai-agents-python/.venv/lib/python3.10/site-packages/agents/realtime/openai_realtime.py", line 576, in _handle_ws_event
    parsed: AllRealtimeServerEvents = self._server_event_type_adapter.validate_python(event)
  File "/Users/abhijit.pal/openai-agents-python/.venv/lib/python3.10/site-packages/pydantic/type_adapter.py", line 421, in validate_python
    return self.validator.validate_python(
pydantic_core._pydantic_core.ValidationError: 2 validation errors for tagged-union[ConversationCreatedEvent,ConversationItemCreatedEvent,ConversationItemDeletedEvent,ConversationItemInputAudioTranscriptionCompletedEvent,ConversationItemInputAudioTranscriptionDeltaEvent,ConversationItemInputAudioTranscriptionFailedEvent,ConversationItemRetrieved,ConversationItemTruncatedEvent,RealtimeErrorEvent,InputAudioBufferClearedEvent,InputAudioBufferCommittedEvent,InputAudioBufferSpeechStartedEvent,InputAudioBufferSpeechStoppedEvent,RateLimitsUpdatedEvent,ResponseAudioDeltaEvent,ResponseAudioDoneEvent,ResponseAudioTranscriptDeltaEvent,ResponseAudioTranscriptDoneEvent,ResponseContentPartAddedEvent,ResponseContentPartDoneEvent,ResponseCreatedEvent,ResponseDoneEvent,ResponseFunctionCallArgumentsDeltaEvent,ResponseFunctionCallArgumentsDoneEvent,ResponseOutputItemAddedEvent,ResponseOutputItemDoneEvent,ResponseTextDeltaEvent,ResponseTextDoneEvent,SessionCreatedEvent,SessionUpdatedEvent,OutputAudioBufferStarted,OutputAudioBufferStopped,OutputAudioBufferCleared,ConversationItemAdded,ConversationItemDone,InputAudioBufferTimeoutTriggered,ConversationItemInputAudioTranscriptionSegment,McpListToolsInProgress,McpListToolsCompleted,McpListToolsFailed,ResponseMcpCallArgumentsDelta,ResponseMcpCallArgumentsDone,ResponseMcpCallInProgress,ResponseMcpCallCompleted,ResponseMcpCallFailed]
session.created.session.RealtimeSessionCreateRequest.type
  Field required [type=missing, input_value={'object': 'realtime.sess...: None, 'include': None}, input_type=dict]
    For further information visit https://errors.pydantic.dev/2.11/v/missing
session.created.session.RealtimeTranscriptionSessionCreateRequest.type
  Field required [type=missing, input_value={'object': 'realtime.sess...: None, 'include': None}, input_type=dict]
    For further information visit https://errors.pydantic.dev/2.11/v/missing

Expected behavior

No error on connection

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