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xAI Docs

xAI · Docs

xAI Docs

August 1, 2026 at 12:17 AM UTC

reference_audios now takes first-party preset voices via voice_id (same identifiers as the TTS API), resolved server-side from the model’s voice-preset catalog—not arbitrary audio URLs or base64 clips.

Changelog

xAI Docs release notes

Developers — REST API (video & models)

Video generation

  • reference_audios now takes first-party preset voices via voice_id (same identifiers as the TTS API), resolved server-side from the model’s voice-preset catalog—not arbitrary audio URLs or base64 clips.
  • Still optional for reference-to-video; at most 3 entries; supported only on select video models. Audio-only R2V (without reference_images) remains valid.

Models

  • input_modalities docs now note "audio" for models that accept reference audio (alongside examples like "text" and "image").

No pages were added or removed.

Older release← Jul 30, 18:17 UTCNewer release→ Aug 1, 02:17 UTC
All xAI Docs releases →