AI video model comparison

Seedance 2.0 Fast vs Gen-4.5

By Megaton TeamJuly 25, 2026

Seedance 2.0 Fast is the better overall choice over Gen-4.5. It scores higher in every quality category shown.

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Seedance 2.0 Fast
Gen-4.5

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Our verdict

Seedance 2.0 Fast is the better choice

Seedance 2.0 Fast scores higher than Gen-4.5 in every quality category shown. Its biggest lead is in text rendering, and it also is the only model here with audio output.

ByteDance

ByteDance

Seedance 2.0 Fast

70.0Overall score
Rank
#2
Price per minute
$7.26/min
Runway

Runway

Gen-4.5

40.0Overall score
Rank
#18
Price per minute
$7.20/min

Best for

Highest overall score

Seedance 2.0 Fast

Seedance 2.0 Fast leads the overall score by 30.0 points.

The overall score does not measure file reliability.

Best for

More readable text

Seedance 2.0 Fast

Seedance 2.0 Fast leads by 37.2 points.

Long or moving text still needs manual review.

Best for

Lower generation cost

Gen-4.5

Gen-4.5 runs $7.20/min, against $7.26/min for Seedance 2.0 Fast.

Provider prices can change.

Best for

Built-in audio

Seedance 2.0 Fast

Seedance 2.0 Fast generates audio with the video; Gen-4.5 does not.

This comparison does not score audio quality.

236
videos rated
6,608
measurements
944
ratings
July 25, 2026
last updated

Reviewer scores

Scores by category

Seedance 2.0 Fast wins all 13 categories head-to-head. Each bar is the reviewer score out of 100.

Biggest gapText Fidelity: Seedance 2.0 Fast ahead by 37.2 points.
Closest categoryAnime Animation: Seedance 2.0 Fast ahead by 14.9 points.

Head-to-head scores

13 categories rated head-to-head

Seedance 2.0 FastGen-4.5
Physics
57.8
37.4
Prompt Adherence
68.4
47.0
Logic Consistency
68.1
35.6
Scene Consistency
54.5
38.1
Cinematography
74.7
44.0
2D Animation
66.8
41.0
3D Animation
65.7
38.5
Anime Animation
67.4
52.5
Hands
71.6
48.0
Actor Performance
73.3
38.0
Objects
76.9
42.4
Animals
73.5
40.2
Text Fidelity
67.7
30.5

Technical reliability

How reliably does each model deliver clean video?

These checks look for freezes, bad framing, compression problems, and unstable motion. They are kept separate from the reviewer scores above.

Seedance 2.0 Fast
120 videos rated · Jun 2026
Gen-4.5
116 videos rated · Jul 2026

File reliability checks

Playback, framing, and motion stability

Seedance 2.0 FastGen-4.5

Seedance 2.0 Fast's biggest lead: Motion stability, 70.0 versus 43.0.

Technical cleanliness
72.0%
62.0%

Clips with no freezes, bad framing, or severe compression problems.

Freeze-free playback
100.0%
97.0%

Clips that play without stalls or frozen frames.

Clean framing
96.0%
91.0%

Clips without unexpected black bars or cropped edges.

Motion stability
70.0
43.0

How consistently surfaces hold their shape and texture while moving.

Edge stability
71.0
66.0

How consistently object outlines remain clean while moving.

Side-by-side video tests

Same prompt, side by side

Both videos in each row were generated from the prompt shown. Watch them side by side to compare how each model handled the same request.

Video test 1

Text

Spelling, letter shape, spacing, and whether the words remain stable while the scene moves.

Related category score

Seedance 2.0 Fast leads here by 37.2 points.

Show the full prompt

Conceptual still-life commercial shot, locked medium frame on a translucent plastic shopping bag bulging with white daisies and baby's breath, set on a flat warm-taupe seamless. Across the wrinkled surface of the bag, the words "Megaton Reviews" are printed in confident red block letters that distort gently as the bag breathes in a light draft. Crisp studio key light, every letter holding shape and curvature through plastic creases, the playful collision of high fashion and corner-store packaging.

Text videos generated from the same prompt by Seedance 2.0 Fast and Gen-4.5
Loading video
Seedance 2.0 Fast
Loading video
Gen-4.5

Video test 2

Physics

Weight, contact, momentum, and whether objects continue to behave consistently from frame to frame.

Related category score

Seedance 2.0 Fast leads here by 20.3 points.

Show the full prompt

Stylized art-direction motion piece, locked frontal medium shot on a classical marble bust set against a saturated cinnabar-red backdrop, a crown of glowing orange silk ribbons and tiny sparks swirling above its hair. The stone remains undamaged beneath the kinetic light. Hard side key light carving each curl in shadow, gentle smoke-like haze rising past the frame, theatrical illumination.

Physics videos generated from the same prompt by Seedance 2.0 Fast and Gen-4.5
Loading video
Seedance 2.0 Fast
Loading video
Gen-4.5

Video test 3

Cinematography

Framing, camera movement, lighting continuity, and whether the visual treatment follows the prompt.

Related category score

Seedance 2.0 Fast leads here by 30.7 points.

Show the full prompt

Extreme wide-angle 16mm-style fisheye, locked-off on the bow of a tall ship as an adult sailor crouches near the camera, the bowsprit and rigging curving around him in distorted arcs, gray Atlantic swell heaving behind. Wind whips his curls, ropes thump against masts. Heavy practical grain, vignetted edges, desaturated blues and bone whites, archival expedition film texture.

Cinematography videos generated from the same prompt by Seedance 2.0 Fast and Gen-4.5
Loading video
Seedance 2.0 Fast
Loading video
Gen-4.5

Capabilities

Inputs and outputs

CapabilitySeedance 2.0 FastGen-4.5
Text inputYesYes
Image inputYesYes
Video inputYesYes
Audio inputYesNo
Image outputNoNo
Audio outputYesNo

FAQ

Common questions

Is Seedance 2.0 Fast better than Gen-4.5?

Seedance 2.0 Fast is better overall and scores higher in every quality category.

Is Seedance 2.0 Fast cheaper than Gen-4.5?

Gen-4.5 costs less at $7.20 per minute, compared with $7.26 for Seedance 2.0 Fast.

Does Seedance 2.0 Fast generate audio?

Yes, Seedance 2.0 Fast includes audio output.

Does Gen-4.5 generate audio?

No, Gen-4.5 does not include audio output.

Which model makes longer clips, Seedance 2.0 Fast or Gen-4.5?

Seedance 2.0 Fast supports longer clips at 15 seconds, compared with 10 seconds for Gen-4.5.

Which model scores higher on Text Fidelity, Seedance 2.0 Fast or Gen-4.5?

Seedance 2.0 Fast scores higher for text rendering.

Which model scores higher on Actor Performance, Seedance 2.0 Fast or Gen-4.5?

Seedance 2.0 Fast scores higher for actor performance.

How are Seedance 2.0 Fast and Gen-4.5 compared?

Megaton compares each model's latest published scores. The side-by-side videos use the same prompts.

More comparisons

More AI video model comparisons

Browse more head-to-head results, including scores, prices, and side-by-side video tests.

Other AI video model comparison pages
ComparisonProvidersOverall scores
Seedance 2.0 vs Seedance 2.0 FastByteDanceByteDance73.0 / 70.0
Seedance 2.0 Fast vs HappyHorse-1.0ByteDanceAlibaba70.0 / 62.0
Seedance 2.0 Fast vs Kling 3 ProByteDanceKling70.0 / 62.0
Seedance 2.0 Fast vs Veo 3ByteDanceGoogle70.0 / 60.0
Seedance 2.0 Fast vs Veo 2ByteDanceGoogle70.0 / 56.0
Seedance 2.0 Fast vs Veo 3.1ByteDanceGoogle70.0 / 56.0
Seedance 2.0 Fast vs Veo 3.1 FastByteDanceGoogle70.0 / 51.0
Seedance 2.0 Fast vs Veo 3 FastByteDanceGoogle70.0 / 48.0
Seedance 2.0 vs Gen-4.5ByteDanceRunway73.0 / 40.0
HappyHorse-1.0 vs Gen-4.5AlibabaRunway62.0 / 40.0
Kling 3 Pro vs Gen-4.5KlingRunway62.0 / 40.0
Kling 2.6 vs Gen-4.5KlingRunway60.0 / 40.0
Veo 3 vs Gen-4.5GoogleRunway60.0 / 40.0
Grok Imagine 1.0 vs Gen-4.5xaiRunway58.0 / 40.0
Veo 2 vs Gen-4.5GoogleRunway56.0 / 40.0
Veo 3.1 vs Gen-4.5GoogleRunway56.0 / 40.0
PixVerse v5.5 vs Gen-4.5PixVerseRunway55.0 / 40.0
Grok 2025 vs Gen-4.5xaiRunway54.0 / 40.0
Seedance 1.5 Pro vs Gen-4.5ByteDanceRunway53.0 / 40.0
Veo 3.1 Fast vs Gen-4.5GoogleRunway51.0 / 40.0
Sora 2 Pro vs Gen-4.5OpenAIRunway50.0 / 40.0
Veo 3 Fast vs Gen-4.5GoogleRunway48.0 / 40.0
Vidu Q2 vs Gen-4.5ViduRunway45.0 / 40.0
LTX-2 19B vs Gen-4.5LightricksRunway43.0 / 40.0
Gen-4.5 vs Pika v2.2 Text-to-VideoRunwayPika40.0 / 26.0
Gen-4.5 vs Infinity StarRunwayFoundationVision40.0 / 24.0
Seedance 2.0 vs HappyHorse-1.0ByteDanceAlibaba73.0 / 62.0
Seedance 2.0 vs Kling 3 ProByteDanceKling73.0 / 62.0
HappyHorse-1.0 vs Kling 3 ProAlibabaKling62.0 / 62.0
Seedance 2.0 vs Kling 2.6ByteDanceKling73.0 / 60.0
Seedance 2.0 vs Veo 3ByteDanceGoogle73.0 / 60.0
HappyHorse-1.0 vs Veo 3AlibabaGoogle62.0 / 60.0

Methodology

How we tested Seedance 2.0 Fast and Gen-4.5

We score two things separately: how good the video looks to a reviewer, and how reliably the file itself holds up. A model can make great-looking footage and still deliver clips with freezes, bad framing, or unstable motion.

Reviewer scores
Scores come from each model's latest published evaluation. The side-by-side videos use the same prompts so you can compare the results directly.
File reliability
Automated checks review 236 clips for freezes, bad framing, compression problems, unstable motion, distorted geometry, exposure problems, and invalid file properties.
Missing scores
Categories with a score for only one model are shown but excluded from the head-to-head win count. Price and generation speed stay separate because they use different units.
Last updated
Reviewer scores and rankings use results from July 25, 2026. Reliability results use the latest completed test for each model. Provider prices and rankings can change.
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