For AI agents: a documentation index is available at the root level at /llms.txt. Append /llms.txt to any URL for a page-level index, or .md for the markdown version of any page.
Claude Haiku 5.5: The claude-haiku-5-5 model is now available for assistants and squads, with a reasoning-effort control, and it can be selected as an eval judge model.
Gemini 3.8 Flash: The gemini-3.8-flash model is now available on the Google provider.
Cartesia Sonic-3.6: The Cartesia sonic-3.6 voice is now available in the dashboard voice settings.
Features
Priority processing (OpenAI Fast mode): A new Priority processing switch in the assistant editor runs supported OpenAI models in OpenAI’s Fast service tier, billed at OpenAI’s Fast rates, and the served service tier now appears in call.costs.
Monitor failed server messages: You can now add a “Server message failed” monitor that alerts you when a server message (webhook) fails to deliver, filterable by message type, URL, status code, and failure reason.
Fixes and Improvements
Twilio SIP warm-transfer fix: On Twilio SIP calls, the warm-transfer URL is now set on the <Sip> verb instead of <Dial>.
GPT-Live silence fix: GPT-Live now drops queued silence so voice simulations no longer overflow.
Call recording reliability: Recording update and token creation on the Daily media provider are now retried, so video recordings are more reliable.
