Video model comparison · 2 models · Updated Nov 2, 2026

Grok Imagine Video 1.5 vs FLUX 3 Video

Preferred for image to video: Too close to call · Lowest entry price: Grok Imagine Video 1.5 · Longest clips: FLUX 3 Video. Quality scores are blind human-preference votes; specs and prices come from each lab’s listings.

xAI
Grok Imagine Video 1.5
Released May 30, 2026
- Text to video
- Image to video
- Audio input
- Native audio
- Arena1,456
- From$0.08/s
- Max length15 s
Full specs Remove Grok Imagine Video 1.5
Black Forest Labs
FLUX 3 Video
Released Aug 4, 2026
- Text to video
- Image to video
- Video editing
- Native audio
- Arena1,493
- From$0.17/s
- Max length20 s
Full specs Remove FLUX 3 Video
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01 — At a glance

Where they differ

Quality is the arena score from blind, side-by-side human votes. Price, length and resolution come from each lab’s own listings.

Preferred for image to videoToo close to callGrok Imagine Video 1.5 1,456 (#8) · FLUX 3 Video 1,449 (#9) — blind human votes
Lowest entry priceGrok Imagine Video 1.5Grok Imagine Video 1.5 from $0.08/s (480p) · FLUX 3 Video from $0.17/s (720p)
Longest clipsFLUX 3 VideoGrok Imagine Video 1.5: 1–15 s · FLUX 3 Video: 5–20 s
Highest resolutionFLUX 3 VideoGrok Imagine Video 1.5: 1080p · FLUX 3 Video: 4K
NewestFLUX 3 VideoGrok Imagine Video 1.5 May 30, 2026 · FLUX 3 Video Aug 4, 2026
Widest inputsSame inputsGrok Imagine Video 1.5: Text prompts, Reference images, Audio · FLUX 3 Video: Text prompts, Reference images, Video
Native audioBoth generate soundGenerates an audio track with the video: Grok Imagine Video 1.5 yes · FLUX 3 Video yes
Image to videoBoth animate imagesStarts from an uploaded image: Grok Imagine Video 1.5 yes · FLUX 3 Video yes
Self-hostingNo open weightsBoth are available only through APIs and apps
Most API hostsGrok Imagine Video 1.5Grok Imagine Video 1.5: 2 · FLUX 3 Video: 1

02 — Side by side

Every spec in one table

Dashes mean the data is not published.

Grok Imagine Video 1.5 vs FLUX 3 Video specifications side by side
Specification	Grok Imagine Video 1.5xAI	FLUX 3 VideoBlack Forest Labs
Quality (blind human votes)
Text to video arenaElo-style score · higher is better	—	1,493 ±17#3 of 48 · 1,302 votes
Image to video arenaElo-style score · higher is better	1,456 ±4#8 of 48 · 137,459 votes (best)	1,449 ±5#9 of 48 · 37,042 votes
Price
Starting price	$0.08/s 480p (best)	$0.17/s 720p
Top price	$0.25/s 1080p	$0.41/s 4K
10-second clip	$0.80at the starting rate (best)	$1.70at the starting rate
Extra charges	$0.01 per input image	—
How it is billed	Per second	Per second
Output
Produces	Video with sound	Video with sound
Resolutions	480p · 720p · 1080p	720p · 1080p · 2K · 4K
Highest resolution	1080p	4K (best)
Clip length	1–15 s	5–20 s
Longest clip	15 s	20 s (best)
Sound	Always generated	Optional
Frame control	First and last frame	First and last frame
Inputs
Text prompts	Yes	Yes
Start image (image to video)	Yes	Yes
Video input	No	Yes
Audio input	Yes	No
References	Up to 14 reference images and 3 voice references	A video to continue
Access
Weights	Proprietary	Proprietary
API model ID	`grok-imagine-video-1.5`	—
API hosts	2 (best)	1
Released	May 30, 2026	Aug 4, 2026

03 — Questions

Which should you choose?

Which is better, Grok Imagine Video 1.5 or FLUX 3 Video?

For image to video, voters rate them about the same (Grok Imagine Video 1.5 1,456 (#8) · FLUX 3 Video 1,449 (#9)). Arena scores come from blind, side-by-side human votes on the same prompts; when the gap is inside both models’ error margins we call it a tie. Test your own prompts before you commit.

Which is cheaper?

Grok Imagine Video 1.5 costs from $0.08/s (480p), up to $0.25/s (1080p); FLUX 3 Video costs from $0.17/s (720p), up to $0.41/s (4K). A 10-second clip at the lowest rate: Grok Imagine Video 1.5 $0.80, FLUX 3 Video $1.70. Prices are list rates and change often; check the lab before budgeting.

How long can the videos be, and at what resolution?

Grok Imagine Video 1.5: 1–15 s, 480p / 720p / 1080p; FLUX 3 Video: 5–20 s, 720p / 1080p / 2K / 4K.

What is the difference between Grok Imagine Video 1.5 and FLUX 3 Video?

Grok Imagine Video 1.5 is a video model from xAI (May 30, 2026), taking text prompts, reference images and audio and producing video with sound. FLUX 3 Video is a video model from Black Forest Labs (Aug 4, 2026), taking text prompts, reference images and video and producing video with sound.

Which is newer?

Grok Imagine Video 1.5 May 30, 2026; FLUX 3 Video Aug 4, 2026.

Which generates video with sound?

Generates an audio track with the video: Grok Imagine Video 1.5 yes; FLUX 3 Video yes.

Can I run any of these on my own hardware?

No open weights. Both are available only through APIs and apps.