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.
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Voice AgentsModels
DocumentationAPI ReferenceSelf HostModel CardsClient LibrariesIntegrationsDeveloper ToolsChangelog
Voice AgentsModels
DocumentationAPI ReferenceSelf HostModel CardsClient LibrariesIntegrationsDeveloper ToolsChangelog
    • General
    • Lightning v3.1
    • Pulse STT
    • Hydra
  • General
  • July 21, 2026
  • July 18, 2026
  • July 17, 2026
  • July 16, 2026
  • June 23, 2026
  • June 12, 2026
  • June 3, 2026
  • May 23, 2026
  • May 22, 2026
  • May 22, 2026
  • May 12, 2026
  • May 7, 2026
  • April 22, 2026
  • April 20, 2026
  • Lightning v3.1
  • July 10, 2026
  • July 3, 2026
  • June 15, 2026
  • June 5, 2026
  • June 1, 2026
  • May 19, 2026
  • May 19, 2026
  • May 15, 2026
  • May 14, 2026
  • May 8, 2026
  • May 2, 2026
  • May 2, 2026
  • Pulse STT
  • July 22, 2026
  • July 22, 2026
  • July 15, 2026
  • July 12, 2026
  • July 10, 2026
  • July 10, 2026
  • June 29, 2026
  • June 16, 2026
  • June 15, 2026
  • May 30, 2026
  • May 30, 2026
  • May 28, 2026
  • May 22, 2026
  • May 15, 2026
  • May 8, 2026
  • May 6, 2026
  • May 6, 2026
  • May 4, 2026
  • May 3, 2026
  • May 1, 2026
  • May 1, 2026
  • May 1, 2026
  • April 30, 2026
  • April 21, 2026
  • April 20, 2026
  • Hydra
  • May 20, 2026

General

June 3, 2026
June 3, 2026

WebSocket auth and default URL fixes

Fixed authentication configuration and default server URLs across the WebSocket specs for Lightning TTS, Pulse STT, and related endpoints.

Additional endpoints for v2.2.0 and v3.0.1 are now marked deprecated in the API reference.

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Hydra — full-duplex speech-to-speech model

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