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1. **OpenAI Voice Enhancements**: When using [OpenAI Voice models in `Assistant.voice`](https://api.vapi.ai/api#:~:text=OpenAIVoice), you can now use specific text to speech models and add custom instructions to control your assistant's voice output

2. **Improved Call Error Reporting**: You can now use new [`Call.endedReason`](https://api.vapi.ai/api#:~:text=Call,-CallBatchError) codes when a call fails to start or ends unexpectedly due to failing to retrieve Vapi objects. Refer to [Call.endedReason](https://api.vapi.ai/api#:~:text=Call,-CallBatchError) for more details.