New features, fixes, and API updates, shipped continuously.
On September 16, 2026, every remaining Voice Widget moves to the upgraded design and faster real-time backend. No action is required: the embed already on your site keeps working.
The Voice Widget migration guide explains what changes and how to test the new embed before then.
The Speech Recognition setting now gives a clearer trade-off between speed and precision. Choose Faster for the lowest latency, or High Accuracy when the agent needs to capture numbers reliably, such as phone numbers, order IDs, and account references. High Accuracy costs some latency in exchange.
You set it under Additional Settings in the agent editor.
Agents now have access to the current date and time on every call. The new {agent_current_time} system variable returns it in the agent’s timezone as ISO 8601 with a UTC offset, and works in prompts and custom actions.
Accounts that are not on an enterprise plan run on Synthflow LLM, our model built for voice agents and tuned for real-time phone conversations, with lower latency and more natural turn-taking than a general-purpose model. Third-party models, including the GPT family, are no longer available on these plans.
Synthflow LLM is the only option in the AI Model selector under General settings. Existing agents are migrated automatically, so no action is required in the dashboard.
API requests that set llm to a GPT value are still accepted and the response looks normal, but the agent stays on Synthflow LLM. Nothing in the response signals that the value was ignored, so update that field in your own automations.
Enterprise accounts are unaffected by this change.
Call logs can now be filtered by the customer’s phone number, so you can find a call when the number is all you have. The filter matches calls to and from that number, and combines with the date, agent, duration, type, and status filters.
Call an entire list with one request. Campaigns dial your recipients over time, as fast as your concurrency allows. Create and control them through the Platform API, pause, resume, or cancel at any point, and watch progress in the portal under Campaigns.
Available on our Enterprise plans. Reach out to our support team to activate it on your account.
Your agents can now keep office hours. Set business hours for each day of the week in the agent editor, evaluated in the agent’s own timezone, and pick what happens to inbound calls outside them: decline the call, transfer it, or run a custom action. Outbound calls placed while the agent is closed are declined.
Meet our Advanced Synthflow LLM, the strongest reasoning model in the Synthflow family. It handles complex logic and long prompts, so agents with deep branching, detailed conditions, and long instructions stay accurate.
Use it when your prompt has outgrown Synthflow LLM, which stays the default.
Subaccount usage counters can now be reset. Set minutes_used to 0 on PUT /subaccounts/:subaccount_id and the customer’s cycle starts fresh, so you can run their subscription on your own billing schedule.
You can now route inbound 8x8 Contact Center calls to Synthflow AI agents. Import an 8x8 number in Synthflow to receive a generated 12-digit routing identifier, then use it in your 8x8 Forward to External IVR flow. See the setup guide for instructions.
You can now import Five9 and RingCX numbers through the POST /custom-numbers endpoint. Synthflow sets their SIP domain automatically.
