September 2026

Speech to Text (STT)

Model APIs

Keyterm Prompting: Added Keyterm Prompting support for saaras:v4 on the REST and Batch APIs. Pass a JSON list of up to 50 domain-specific names, places, brands, or technical terms under keyterms to bias recognition toward them.

Voice Agents Updates

Voice Agents

Saaras V4 Generally Available: saaras:v4 is now live on Voice Agents and generally available - routing happens automatically, with no configuration change needed. Saaras V4 extends English recognition beyond Indian English to Global English accents, stays state-of-the-art across all 22 Indian languages, and improves language identification and robustness to noisy, code-mixed audio. See the Saaras model page for the full feature list.

Call Transfer: A voice agent can now hand a live phone call to a human, another number, or your own SIP trunk when the conversation needs it - an escalation, a specialist, or an explicit request to speak to someone. Configure it as Call forwarding under Settings → In Call Actions, with a fixed destination or an agent variable resolved at runtime, to a phone number (E.164) or a SIP URI. Supported end to end on Vobiz. Transferred calls show End Reason CALL_TRANSFER in Call Logs. See Call transfer.

Inbound Webhooks: Inbound deployments can now POST a call-completion event to your webhook endpoint after every inbound call, with the transcript, duration, agent variables, and the caller’s phone number - configured via the deployment’s webhook_config. See the Deployments webhook payload reference, List webhook deliveries, and Retry webhook deliveries.

Phone Number Rotation: Agent campaigns can now rotate caller IDs on retries. With Phone number rotation enabled, every subsequent call to the same user uses a different agent number until each number in the pool has been used once for that user - so a contact who didn’t answer one number gets the retry from another, not the same one again. Requires two or more agent numbers on the campaign. Enable it from the Phone number rotation toggle under Advanced on the Schedule step of the campaign wizard, or set phone_rotation.agent: true in app_config.