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.
Reson8 transcriber: Reson8 is now available as a transcriber, with support for multiple candidate languages, keyterms, custom models, and turn detection settings. You can use Vapi’s key or your own Reson8 API key.
Soniox stt-rt-v6 with assistant context: Soniox’s stt-rt-v6 transcription model is now available. As the assistant speaks, Vapi streams its words to Soniox, so Soniox can filter out echo and understand the caller in the context of the conversation. The result is more accurate transcripts and fewer misheard turns.
Claude Sonnet 4.6 on Bedrock: Claude Sonnet 4.6 is now available through Amazon Bedrock’s global cross-region profile (global.anthropic.claude-sonnet-4-6) when you use your own AWS credentials.
Features
Background sounds in simulations: You can now add a background sound to a simulation personality to test how your assistant handles a caller in a noisy place. Choose office, white noise, city, crowd, or farm, or use your own audio URL. You can also set the four new sounds, white-noise, city, crowd, and farm, with backgroundSound on an assistant.
