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stephenvapiai merged 2 commits into from
Jul 29, 2026
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What's New 07-27-2026 #1120

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What's New for the week of 07-27-2026
stephenvapiai Jul 28, 2026
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WhatsNew for 7-27-26
stephenvapiai Jul 29, 2026
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15 changes: 15 additions & 0 deletions fern/changelog/2026-07-27.mdx
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# What's New: Week of July 27, 2026

## New Models

1. **Anthropic Claude Sonnet 5**: Anthropic's Claude Sonnet 5 is now available as a model for assistants.

2. **OpenAI GPT-5.5 "Instant"**: OpenAI's [GPT-5.5](/providers/model/openai) (`gpt-5.5` and `gpt-5.5-chat-latest`) is now available as a model for assistants.

3. **OpenAI GPT-5.6 Models**: OpenAI's [GPT-5.6](/providers/model/openai) models (`sol`, `terra`, and `luna`) are now available for assistants.

4. **Inworld TTS-2**: Inworld's [TTS-2](/providers/voice/inworld) voice is now available for assistants.

## SIP Call Transfers

1. **SIP Warm Transfer Audio**: Warm [call transfers](/call-forwarding) on SIP calls now play hold audio to the operator and a completion sound (`transferCompleteAudioUrl`) when the transfer connects.
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