When a provider fails, the call carries on.

The next model, voice or listening stream in line takes the turn, mid-sentence if it has to.

<1s

to the next provider when one fails

Worst case: every first choice fails on one call to Kestrel AutoExample

Listening
1. Deepgrammoved on after: No words back
2. ElevenLabsHeard every word
At 0:14ConfirmedWednesday service
Thinking
1. OpenAImoved on after: Timeout
2. AnthropicTook the turn
3. GoogleIn line
At 0:52BookedMoved to Thursday, 2:30 PM
Speaking
1. ElevenLabsmoved on after: Stopped mid-sentence
2. CartesiaFinished the reply
3. Fish AudioIn line
At 1:18SentAddress texted

Your rules

You decide when it moves on.

Set what counts as a failure and how many tries each provider gets. With hedging on, a slow model never holds the line.

FailoverFront desk · Model

Tries each: 3
Move on when: Timeout
Server error (5xx)
Rate limit
Not on: OverloadNetworkEmpty result
Hedge slow answers: OnWhen the first model is slow, the next one is asked in parallel and the first good answer is used.
Next turn: Every new turn: Starts at your first choice
A provider keeps failing: It sits out the call
Your keys: Your key on the stage: Backups run on your keys
No key of yours: Ours, at list rates
Model freedom (BYOK)
Your systems: Your system says no: Try again, or offer the next option
Handoff to your systems
Your people: Nobody picks up: The next step is booked
Transfers

Choose providers for listening, thinking and speaking, and read the failover policy your agent will run.

0:52 · Anthropic took the turn