Official-source specification comparison · no winner declared
FLUX 3 vs Grok Imagine 1.5
FLUX 3 documents a broad Early Access video system with native audio and up to 20-second generations. Grok Imagine 1.5 also has explicit text and image-reference routes on fal. Compare matching tasks and endpoints separately; the original image-to-video announcement does not describe every route now documented. Provider announcement · xAI preview · xAI current docs · fal text route · fal reference route
Evidence boundary: DualView has not yet run the controlled benchmark described below. Specifications come from official pages. Vendor samples are not matched for prompt, input, settings, selection, or post-processing. Provider announcement · xAI preview · xAI current docs · fal text route · fal reference route
September 28 input-scope correction: The previous comparison relied on Grok’s image-to-video preview description. fal also documents explicit v1.5 text-to-video and image-reference routes. This is a documentation correction, not a new-release date or a measured quality result.
Official showcase material
These are real videos published by the model providers. Watch them as examples of each vendor's presentation, not as evidence that one model beats the other.
FLUX 3 official showcase
Official BFL launch-page media streamed from the vendor CDN with preloading disabled.
Open the official sourceGrok Imagine 1.5 official showcase
xAI-published launch-page output preserved without re-encoding.
Open the official sourceWhat the official documentation actually supports
Black Forest Labs and xAI frame these releases differently. FLUX 3 spans text, image, video, and audio workflows, including T2V, I2V, V2V, continuation, keyframes, dialogue, and chaining. Grok’s preview announcement describes still-image animation; fal now documents text and image-reference routes under the v1.5 namespace as well. Provider announcement · xAI preview · xAI current docs · fal text route · fal reference route
BFL reports that FLUX 3 was preferred over Grok Imagine Video in up to 69 percent of its preliminary comparisons. This is a vendor-reported Early Access result; the announcement does not identify it as a DualView test, and the label does not establish that every sample used Grok Imagine 1.5. It is context for designing an independent replication, not a verdict. Provider announcement · xAI preview · xAI current docs · fal text route · fal reference route
A useful replication should publish the starting frames, exact prompts, model identifiers, settings, failed attempts, and every selected output. The first lane should hold duration and resolution equal. A second lane can explore FLUX 3's 20-second range and Grok's current resolution options without mixing those operational differences into the core quality score. Provider announcement · xAI preview · xAI current docs · fal text route · fal reference route
| Question | FLUX 3 | Grok Imagine 1.5 |
|---|---|---|
| Fair overlapping lane | Image-to-video from a starting frame or visual reference | Image-to-video; separate fal text and image-reference routes |
| Broader generation | T2V, V2V, continuation, keyframes, and chaining documented | Text-to-video and image-reference routes documented on fal; do not infer video-editing support from these routes |
| Duration evidence | Up to 20 seconds | Official launch example uses 10 seconds; model page states no maximum |
| Audio | Native audio on all documented video outputs | Prompt-directed sound design |
| Status | Early Access; evaluations explicitly preliminary | API model with preview and dated aliases in current docs |
| Independent matched result | Not measured by DualView | Not measured by DualView |
Provider announcement · xAI preview · xAI current docs · fal text route · fal reference route
Model profiles in one paragraph
FLUX 3
Black Forest Labs documents Early Access video with native audio up to 20 seconds, text-to-video, image-to-video, video-to-video, video-audio continuation, keyframe transitions, multilingual dialogue, and clip chaining. Provider announcement · xAI preview · xAI current docs · fal text route · fal reference route
Grok Imagine 1.5
xAI’s preview announcement describes single-image animation. Additional fal v1.5 text and image-reference routes broaden the documented input choices; their schemas must be checked separately. Provider announcement · xAI preview · xAI current docs · fal text route · fal reference route
Compare the endpoint as well as the model
As checked September 28, fal’s text schema lists 480p, 720p and 1080p. The reference schema lists up to seven images with 480p or 720p output. A limit from one route should not be copied to another. Its introductory audio-reference wording has no corresponding audio field in the displayed schema, so audio-reference submission remains unresolved here. Text schema · Reference schema
Keep still-image, text-only and reference-set comparisons separate. Save the exact endpoint, inputs and settings alongside each output, then inspect the matched files in DualView’s video editor. The vendor showcases above do not constitute those matched experiments.
A fair comparison protocol
The protocol below isolates shared capabilities before exploring model-specific advantages. Save original files and settings so another reviewer can reproduce the result. Provider announcement · xAI preview · xAI current docs · fal text route · fal reference route
Use identical source images and a balanced set of camera, action, atmosphere, and sound prompts. Provider announcement · xAI preview · xAI current docs · fal text route · fal reference route
Fix the first pass at 10 seconds and 720p to align with both vendors' published examples. Provider announcement · xAI preview · xAI current docs · fal text route · fal reference route
Retain all outputs and retries; blind the model labels during human preference scoring. Provider announcement · xAI preview · xAI current docs · fal text route · fal reference route
Report source fidelity, instruction adherence, motion coherence, audio synchronization, latency, and cost separately. Provider announcement · xAI preview · xAI current docs · fal text route · fal reference route
Which one belongs on the shortlist?
Start with Grok Imagine 1.5 when the workflow is intentionally one-image-in and video-out. Compare both documented text routes for text-only work. Investigate FLUX 3 separately for V2V, continuation and keyframes. Do not treat BFL's preliminary vendor result as a substitute for your own matched inputs. Provider announcement · xAI preview · xAI current docs · fal text route · fal reference route
What this page does not claim
This FLUX 3 and Grok Imagine 1.5 review does not declare an overall quality winner or turn provider preference figures into independent evidence. It leaves undocumented limits blank. Recheck the linked first-party pages because access, aliases, pricing, and output options can change. Provider announcement · xAI preview · xAI current docs · fal text route · fal reference route
Official sources
- Black Forest Labs FLUX 3 announcement
- xAI Grok Imagine 1.5 announcement
- Grok Imagine 1.5 current model documentation