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1. **Introducing `SmsSendTool` for SMS messaging support**: You can now create and send `sms` text messages  using the new `[Send Text`]\([https://api.vapi.ai/api#:\~:text=SmsSendTool](https://api.vapi.ai/api#:~:text=SmsSendTool)) tool, enabling assistants to send SMS messages via defined servers.

![SmsSendTool](/_fern-img/508f686190bc31dc4f6fc436cd2aad0cd2c6f60ffca0ab0b2bca534f00937800.webp)

2. **[Eleven Labs Voice](https://api.vapi.ai/api#:~:text=ElevenLabsVoice) Auto Mode and Confidence Threshold configuration options**: When using [`Eleven Labs Voice`](https://api.vapi.ai/api#:~:text=ElevenLabsVoice) in your Assistant, you can now configure `autoMode` (default: false) to automatically manage manage chunking strategies for long texts; Eleven Labs automatically determines the best way to process and generate audio, optimizing for latency and efficiency. Additionally, `confidenceThreshold` has been introduced in transcriber schemas, allowing developers to set thresholds to discard low-confidence transcriptions and improve accuracy.

3. **Changes to `CartesiaExperimentalControls` Speed property**: The `speed` property now accepts both predefined speeds (`'slowest'`, `'slow'`, `'normal'`, `'fast'`, `'fastest'`) and numeric values between -1 and 1. This simplifies the process of controlling the speed of the generated audio with Cartesia.