What's New?

July 27, 2026

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 (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 models (sol, terra, and luna) are now available for assistants.

  4. Inworld TTS-2: Inworld’s TTS-2 voice is now available for assistants.

SIP Call Transfers

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