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AI video model comparison

Gen-4.5 vs Infinity Star

By Megaton TeamJuly 22, 2026

Gen-4.5 is the better overall choice over Infinity Star. It scores higher in nearly every quality category shown.

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Gen-4.5
Infinity Star

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Our verdict

Gen-4.5 is the better choice

Gen-4.5 scores higher than Infinity Star in nearly every quality category shown. Its biggest lead is in 2D animation, and it also supports longer clips.

Runway

Runway

Gen-4.5

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

FoundationVision

Infinity Star

24.0Overall score
Rank
#20
Price per minute
$0.84/min

Best for

Highest overall score

Gen-4.5

Gen-4.5 leads the overall score by 16.0 points.

The overall score does not measure file reliability.

Best for

More readable text

Gen-4.5

Gen-4.5 leads by 28.8 points.

Long or moving text still needs manual review.

Best for

Lower generation cost

Infinity Star

Infinity Star runs $0.84/min, against $7.20/min for Gen-4.5.

Provider prices can change.

164
videos rated
4,592
measurements
656
ratings
July 22, 2026
last updated

Reviewer scores

Scores by category

Gen-4.5 wins 12 of 13 categories head-to-head. Each bar is the reviewer score out of 100.

Biggest gap2D Animation: Gen-4.5 ahead by 31.3 points.
Closest categoryAnimals: Gen-4.5 ahead by 0.8 points.

Head-to-head scores

13 categories rated head-to-head

Gen-4.5Infinity Star
Physics
37.4
14.5
Prompt Adherence
47.0
48.0
Logic Consistency
35.6
23.8
Scene Consistency
38.1
23.4
Cinematography
44.0
29.6
2D Animation
41.0
9.7
3D Animation
38.5
25.7
Anime Animation
52.5
37.3
Hands
48.0
33.0
Actor Performance
38.0
34.7
Objects
42.4
26.0
Animals
40.2
39.4
Text Fidelity
30.5
1.7

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.

Gen-4.5
116 videos rated · Jul 2026
Infinity Star
48 videos rated · Jul 2026

File reliability checks

Playback, framing, and motion stability

Gen-4.5Infinity Star

Gen-4.5's biggest lead: Freeze-free playback, 97.0% versus 96.0%.

Infinity Star's biggest lead: Motion stability, 66.0 versus 43.0.

Technical cleanliness
62.0%
75.0%

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

Freeze-free playback
97.0%
96.0%

Clips that play without stalls or frozen frames.

Clean framing
91.0%
98.0%

Clips without unexpected black bars or cropped edges.

Motion stability
43.0
66.0

How consistently surfaces hold their shape and texture while moving.

Edge stability
66.0
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

Gen-4.5 leads here by 28.8 points.

Show the full prompt

Street-level Tokyo: kanji, hiragana, katakana everywhere. Shop signs, vending machines, posters we follow a woman walking down the street.

Text videos generated from the same prompt by Gen-4.5 and Infinity Star
Loading video
Gen-4.5
Loading video
Infinity Star

Video test 2

Physics

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

Related category score

Gen-4.5 leads here by 22.9 points.

Show the full prompt

Close-up: a match strikes, flares to life, lights a candle. The match head, the flame birth, the wick catching. Material accuracy across wood, phosphorus, wax, fire.

Physics videos generated from the same prompt by Gen-4.5 and Infinity Star
Loading video
Gen-4.5
Loading video
Infinity Star

Video test 3

Cinematography

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

Related category score

Gen-4.5 leads here by 14.4 points.

Show the full prompt

POV from inside a car trunk looking up at three figures who've just opened it. Wide lens, dramatic lighting from below, the perspective is specific and iconic.

Cinematography videos generated from the same prompt by Gen-4.5 and Infinity Star
Loading video
Gen-4.5
Loading video
Infinity Star

Capabilities

Inputs and outputs

See full Gen-4.5 detailsSee full Infinity Star details
CapabilityGen-4.5Infinity Star
Text inputYesYes
Image inputYesYes
Video inputYesNo
Audio inputNoNo
Image outputNoNo
Audio outputNoNo

FAQ

Common questions

Is Gen-4.5 better than Infinity Star?

Gen-4.5 is better overall and leads most quality categories.

Is Gen-4.5 cheaper than Infinity Star?

Infinity Star costs less at $0.84 per minute, compared with $7.20 for Gen-4.5.

Does Gen-4.5 generate audio?

No, Gen-4.5 does not include audio output.

Does Infinity Star generate audio?

No, Infinity Star does not include audio output.

Which model makes longer clips, Gen-4.5 or Infinity Star?

Gen-4.5 supports longer clips at 10 seconds, compared with 5 seconds for Infinity Star.

Which model scores higher on 2D Animation, Gen-4.5 or Infinity Star?

Gen-4.5 scores higher for 2D animation.

Which model scores higher on Text Fidelity, Gen-4.5 or Infinity Star?

Gen-4.5 scores higher for text rendering.

How are Gen-4.5 and Infinity Star compared?

Megaton gives both models the same prompts and compares the resulting videos. Price, audio support, and maximum clip length are also checked.

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 Gen-4.5ByteDanceRunway73.0 / 40.0
Kling 3 Pro vs Gen-4.5KlingRunway62.0 / 40.0
Seedance 2.0 vs Infinity StarByteDanceFoundationVision73.0 / 24.0
Kling 2.6 vs Gen-4.5KlingRunway60.0 / 40.0
Kling 3 Pro vs Infinity StarKlingFoundationVision62.0 / 24.0
Veo 3 vs Gen-4.5GoogleRunway60.0 / 40.0
Grok Imagine 1.0 vs Gen-4.5xaiRunway58.0 / 40.0
Kling 2.6 vs Infinity StarKlingFoundationVision60.0 / 24.0
Veo 3 vs Infinity StarGoogleFoundationVision60.0 / 24.0
Veo 2 vs Gen-4.5GoogleRunway56.0 / 40.0
Veo 3.1 vs Gen-4.5GoogleRunway56.0 / 40.0
Grok Imagine 1.0 vs Infinity StarxaiFoundationVision58.0 / 24.0
PixVerse v5.5 vs Gen-4.5PixVerseRunway55.0 / 40.0
Veo 2 vs Infinity StarGoogleFoundationVision56.0 / 24.0
Veo 3.1 vs Infinity StarGoogleFoundationVision56.0 / 24.0
Grok 2025 vs Gen-4.5xaiRunway54.0 / 40.0
PixVerse v5.5 vs Infinity StarPixVerseFoundationVision55.0 / 24.0
Seedance 1.5 Pro vs Gen-4.5ByteDanceRunway53.0 / 40.0
Grok 2025 vs Infinity StarxaiFoundationVision54.0 / 24.0
Veo 3.1 Fast vs Gen-4.5GoogleRunway51.0 / 40.0
Seedance 1.5 Pro vs Infinity StarByteDanceFoundationVision53.0 / 24.0
Sora 2 Pro vs Gen-4.5OpenAIRunway50.0 / 40.0
Veo 3 Fast vs Gen-4.5GoogleRunway48.0 / 40.0
Veo 3.1 Fast vs Infinity StarGoogleFoundationVision51.0 / 24.0
Sora 2 Pro vs Infinity StarOpenAIFoundationVision50.0 / 24.0
Vidu Q2 vs Gen-4.5ViduRunway45.0 / 40.0
LTX-2 19B vs Gen-4.5LightricksRunway43.0 / 40.0
Veo 3 Fast vs Infinity StarGoogleFoundationVision48.0 / 24.0
Vidu Q2 vs Infinity StarViduFoundationVision45.0 / 24.0
Gen-4.5 vs Pika v2.2 Text-to-VideoRunwayPika40.0 / 26.0
LTX-2 19B vs Infinity StarLightricksFoundationVision43.0 / 24.0
Pika v2.2 Text-to-Video vs Infinity StarPikaFoundationVision26.0 / 24.0

Methodology

How we tested Gen-4.5 and Infinity Star

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
Both models receive the same prompts. Professional reviewers score how well each video follows the prompt and handles motion, composition, people, objects, animals, animation, and on-screen text. Scores use a 0-100 scale.
File reliability
Automated checks review 164 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 22, 2026. Reliability results use the latest completed test for each model. Provider prices and rankings can change.
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