Black Forest LabsZ.aiVideo model matchup
FLUX.3 Videovs.CogVideoX1.5-5B T2V
CogVideoX1.5-5B T2V has no LMArena rating yet.
FLUX.3 Video
Place 3 of 23
CogVideoX1.5-5B T2V
FLUX.3 Video
Place 7 of 21
CogVideoX1.5-5B T2V
FLUX.3 Video
CogVideoX1.5-5B T2V
FLUX.3 Video
CogVideoX1.5-5B T2V
Choose FLUX.3 Video for
Choose CogVideoX1.5-5B T2V for
Same prompt, both models
The first clip from a single request each, showing the first five seconds.
What to look for: Anatomy, object consistency, camera tracking, rain, and reflections. Sound muted, as the test protocol requires.
FLUX.3 Video
Run details
fal.ai. blackforestlabs/flux-3/text-to-video. 16:9, one request, first output, requested 5 s, seed 2955816195, request {"prompt":"Generate exactly one continuous five-second 16:9 cinematic video. A fictional bicycle courier in a mustard-yellow raincoat rides a red city bicycle from left to right across a rain-wet Hamburg street at blue hour for the entire clip. The camera tracks her smoothly at waist height. Both hands remain visible on the handlebars, the bicycle geometry stays physically correct, and a transparent umbrella fixed to the bicycle moves naturally in the wind. Wet-street reflections and raindrops follow realistic physics. No cuts, no slow motion, no text, no logos, no subtitles, and no audio.","aspect_ratio":"16:9","resolution":"720p","duration":5,"generate_audio":false}, configured price estimate $0.85.
Generated Aug 24, 2026. Source
CogVideoX1.5-5B T2V
No clip: this task has not yet been tested for the model.
Show the prompt given to both models
Generate exactly one continuous five-second 16:9 cinematic video. A fictional bicycle courier in a mustard-yellow raincoat rides a red city bicycle from left to right across a rain-wet Hamburg street at blue hour for the entire clip. The camera tracks her smoothly at waist height. Both hands remain visible on the handlebars, the bicycle geometry stays physically correct, and a transparent umbrella fixed to the bicycle moves naturally in the wind. Wet-street reflections and raindrops follow realistic physics. No cuts, no slow motion, no text, no logos, no subtitles, and no audio.
Where is the difference?
Bar length shows the gap: for ratings full width from 60 points, for price from four times as much, for clip length from 20 seconds. Solid means clearly ahead, hatched slightly ahead, a thin grey bar level.
All data side by side
The better value is bold. For ratings only when the gap is clear.
| Metric | FLUX.3 Video | CogVideoX1.5-5B T2V |
|---|---|---|
| Performance | ||
| Text to videoLMArena rating | 1,493Place 3 of 23 | n/a |
| Image to videoLMArena rating | 1,449Place 7 of 21 | n/a |
| Cost | ||
| Price per second | $0.17 | n/a |
| Price per 5 s clip | $0.85 | n/a |
| Output | ||
| Resolution | 4K (Upscaling) | 1360 × 768 |
| Longest clip | 20 s | 10 s |
| Soundgenerated by the model | yes | n/a |
| Input | ||
| Input modes | Text-to-video, image-to-video, and keyframes | n/a |
| Access | ||
| Weights | proprietary | open |
| Parameters | n/a | 5B |
| Routes | API, web | local |
| Released | Aug 4, 2026 | Nov 8, 2024 |
| Status | available | available |
Prices: public API price of the documented standard configuration; resolution and sound can change it
FLUX.3 Video and CogVideoX1.5-5B T2V in the field
Every video model of our comparison with a rating, both models of this matchup highlighted.
Text to video
Rating from anonymous comparisons in the LMArena · higher is better
As of September 22, 2026 · Source: LMArena
Image to video
Rating from anonymous comparisons in the LMArena · higher is better
As of September 22, 2026 · Source: LMArena
Is there a better choice?
Text to video 1,516, Place 1 of 23. $0.51 per 5 s clip.
FLUX.3 Video vs. Gemini Omni 1.1 FlashSources and method
Show 5 sources and the method
Ratings come from the LMArena: people see two videos for the same prompt without knowing which model made them and pick the better one. Many such picks add up to a rating, higher is better. Text to video and image to video are separate lists and are never added together.
“Ahead” means one model stays clearly higher even with the rating’s uncertainty. “Slightly ahead” means its value is higher but the gap is not certain yet. Otherwise both count as level. Places count only the models of our comparison.
Prices and clip lengths come from the providers’ documentation. From a factor of 1.25 a model counts as cheaper or longer, below that as about the same.
- LMArena, Text to video, checked Sep 22, 2026
- LMArena, Image to video, checked Sep 22, 2026
- FLUX.3 Video, specifications, checked Sep 24, 2026
- FLUX.3 Video, price, checked Sep 24, 2026
- CogVideoX1.5-5B T2V, specifications, checked Nov 1, 2026
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