Changelog

Builder: a flow that still names a retired model can be edited again. Saving the draft, validating, builder test calls and publishing now switch that node to the model’s replacement instead of refusing it with invalid_model. This replaces the November 2 note that edits refuse a retired model.

• If the new LLM doesn’t accept the node’s temperature or reasoningEffort, that setting is dropped.
• Validate and publish report each switch as a model_upgraded warning, for example “gpt-4o-mini has been retired; this flow now uses gpt-5.6-luna”.
• When a replacement has itself been retired, calls and edits move on to its replacement.

See When a model is retired.

Prompts: {{system.date}}, {{system.time}}, {{system.timezone}} and {{system.timestamp}} are now in the caller’s timezone. That is the contact’s timezone, else the one the caller’s phone number implies, else UTC (for example a browser call with no contact). Before, they were always UTC.

• A prompt that converted from UTC itself (“add 3 hours”) now gives the wrong time. Remove the conversion.
• New: {{system.weekday}}, the weekday in English (Monday).

See Write prompts.

Prompts: new {{contact.recentCalls}}, the caller’s last 3 analyzed calls on the same flow, newest first. Each line has the date (in the caller’s timezone), the direction and the call summary, cut at 500 characters. It is empty on a first call. See Write prompts.

Telephony: the SIP allowlist notice in the provider form and the Edit provider dialog names both Talkif addresses, 63.176.211.13 (EU) and 44.218.212.38 (US). Outbound calls come from the address of your provider’s region; if you’re not sure which, allow both. See Bring your own SIP trunk.

Telephony: deleting a phone provider in the dashboard now says what it takes: first remove its numbers and any campaigns or schedules that use them. The Keep numbers / Release numbers choice for your own Twilio account is gone; it never changed anything. Numbers in your own Twilio account stay there.

Telephony: when the number limit stops a purchase, the message says which case applies. Before the first payment the limit is lower and adding funds raises it; after the first payment, contact support to raise it. See Buy a number.

Billing: the auto-recharge amount can be set from $5 to $500 (it was $1,000). A recharge never charged more than $500, so a higher amount meant no recharge at all. If yours is higher, lower it. See Credits and payment.

Assistant: when the assistant offers to place a call, its card says “Charged by use after the call” instead of “Billed per second”.

API: in the API definition, POST /calls/{callId}/end is now end_active_call and GET /calls/webrtc/ice-servers is get_webrtc_ice_servers. They no longer share names with the public-call operations. Paths and behaviour are unchanged. GET /calls now gives inprogress as its status example; in_progress is not a valid status.