xAI · current API record Source check · August 2, 2026

Quick answer

Grok Imagine Video 1.5 has five modes, not one limit.

Use grok-imagine-video-1.5 for current xAI API video work. Text and single-image generation can reach native 1080p; reference-led generation tops out at 720p. Choose the mode before you design prompts, inputs, storage, and error handling.

Verified model record

Provider

xAI; the current API model ID is `grok-imagine-video-1.5`.

Generation modes

Text-to-video, image-to-video, reference-to-video, editing, and extension use separate request shapes.

Duration

Standard generation accepts 1–15 seconds. Editing keeps the source duration and caps eligible input at 8.7 seconds.

Resolution

Text-to-video and image-to-video support 1080p. Reference-to-video and editing are capped at 720p.

References

xAI's July 31 release documents up to seven reference images per generation.

API lifecycle

Jobs are asynchronous. The SDK can poll automatically; REST integrations start a request and poll its request ID.

Flowith access

Not established by xAI's release. Check the current Flowith model selector independently.

Mode decision

Match input semantics before resolution

Up to 1080p

Text-to-video

Prompt

Use when no starting frame is required.

Up to 1080p

Image-to-video

Prompt + starting image

Use one image as the first-frame anchor.

Up to 720p

Reference-to-video

Prompt + reference images or permitted preset voices

Use references for identity or scene consistency, not as a starting frame.

Mode-specific

Edit or extend

Prompt + existing video

Editing preserves duration and aspect ratio; extension continues the final frame.

Production gate

A successful job is not an approved asset

The API can return a temporary video URL after asynchronous processing. Your application still owns authorization, retention, review, delivery, and fallback behavior.

  1. 01 Choose exactly one request mode. xAI rejects image-to-video input combined with reference images.
  2. 02 Treat 1080p as mode-specific, not a universal model maximum: reference-to-video remains capped at 720p.
  3. 03 Plan for asynchronous completion, failed or expired jobs, timeouts, retries, temporary output URLs, and moderation outcomes.
  4. 04 Use only media, likenesses, voices, trademarks, and locations you are authorized to process; review xAI's current terms and acceptable-use policy.
  5. 05 Test consistency, motion, audio, typography, continuity, latency, and total cost on your own prompt set before production use.
  6. 06 Verify API entitlement, consumer-plan rollout, region, quota, pricing, and Flowith availability as separate checks.

Continue by decision intent

Reference workflow guide Plan character, product, location, and permitted voice consistency without mixing request modes. API vs SuperGrok access Choose a creator surface or an application integration and verify the right entitlement. Grok 4.5 Keep xAI's language-model identity separate from the Imagine video API model.

Official sources

  1. xAI: Imagine Video 1.5 with References — launch date, consumer rollout, text and image generation, native 1080p, multi-reference count, and API model ID.
  2. xAI video-generation documentation — modes, durations, resolution caps, asynchronous polling, reference audio, errors, and output handling.

Grok Imagine Video 1.5 questions, answered

The current xAI API model ID is grok-imagine-video-1.5. The earlier grok-imagine-video-1.5-preview identifier described a preview and should not be assumed to be the current production choice.
Yes, for text-to-video and image-to-video. xAI's current developer documentation caps reference-to-video at 720p, and video editing matches the source resolution with a 720p cap.
xAI's July 31, 2026 release documents up to seven reference images per generation. Reference images guide elements such as a face, product, or location; they are different from the single starting image used by image-to-video.
Not in the public developer flow documented on August 1, 2026. API reference audio is limited to preset voice IDs, up to three per request, and is currently restricted to trusted partners in the United States. Consumer voice-reference rollout is a separate product surface.
Standard generation accepts a duration from 1 to 15 seconds. Video editing does not accept a custom duration; it keeps the eligible source video's duration, which xAI caps at 8.7 seconds.
This page does not claim a Flowith mapping. xAI API availability, Grok consumer access, and the current Flowith model selector are separate sources, so check the workspace directly.