Vercel AI SDK Adds Support for xAI's Grok Imagine Video 1.5, Including 1080p Generation

Vercel shipped version 4.0.36 of the @ai-sdk/xai package, adding developer support for xAI's grok-imagine-video-1.5 model through the Vercel AI SDK. The patch, detailed in two commits on GitHub, expands video generation capabilities and fixes a reference-routing bug affecting the provider integration.

What changed

The update introduces the grok-imagine-video-1.5 model id to the SDK, along with native 1080p support for both text-to-video and image-to-video generation. Developers using the standard resolution: '1920x1080' parameter will now have that setting map directly to xAI's 1080p mode.

Reference-to-video generation — where a source image guides the output — remains capped at 720p. According to the changelog, if a developer requests 1080p in reference-to-video mode, the SDK automatically downgrades the request and issues a warning rather than failing outright.

The release also fixes a routing bug in the provider logic. Previously, any non-empty inputReferences array triggered reference-to-video mode, even if the array contained only non-image references. This caused the SDK to send an empty reference_images: [] payload with no usable reference data, silently breaking the request.

A second commit adds a new referenceVoiceIds parameter for reference-to-video generation. Developers can now pass up to three xAI preset voice ids (for example, ['eve']) and cite them in prompts using <AUDIO_0> through <AUDIO_2> tags. The SDK translates these into a reference_audios: [{ voice_id }] field sent to xAI's POST /v1/videos/generations endpoint, allowing generated video clips to incorporate specific preset voices.

Context

This is a client library update to Vercel's AI SDK, not a new model release from xAI. The grok-imagine-video-1.5 model itself is xAI's, and this patch simply brings the SDK's provider integration in line with the model's existing capabilities — notably higher-resolution output and voice-referenced audio. No pricing, benchmark, or context window details were included in the release notes, and Vercel's changelog does not disclose per-token or per-generation costs for the video endpoint.

What this means

For developers building on xAI's video generation stack through Vercel's SDK, this patch closes a functional gap: full 1080p output for direct text-to-video and image-to-video calls, plus a cleaner way to inject reference audio into generated clips. The bug fix around reference routing is arguably the more consequential change — silent failures where requests appeared to succeed but returned no usable video references are the kind of issue that erodes trust in an SDK integration. Teams already using @ai-sdk/xai for video workflows should upgrade to 4.0.36 to avoid the previous routing bug and to access the new resolution and voice-reference options.