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Direct comparison

Veo 3.1 Fast vs. Grok Imagine Video

Compare the exact model versions across shared blind-preference benchmarks, public pricing, release dates, resolution, duration, native audio, access, and model availability.

Overview

Technical specifications and pricing

Technical limits come from model or API documentation. A representative minute price appears only when it can be traced to the exact model. Different resolutions and audio settings may still affect the final charge.

Specifications and pricing for Veo 3.1 Fast and Grok Imagine Video
AttributeVeo 3.1 FastGrok Imagine Video
ProviderGooglexAI
ReleasedOctober 15, 2025January 2026
AccessAPI, Web appAPI, Web app
WeightsProprietaryProprietary
ParametersNot publishedNot published
Maximum resolution1080p720p
Maximum duration8 sNot published
Native audioYesYes
Representative API price$9 per minute Source$4.2 per minute Source
LifecycleNo separate noticeNo separate notice
Technical sourceModel sourceVerified 2026-08-24Model sourceVerified 2026-08-24
Veo 3.1 FastGrok Imagine Video
Representative public API priceUSD per generated minute, configurations can differ
Veo 3.1 Fast$9
Grok Imagine VideoLower price$4.2

Key to the marks:better valuebetter, but not conclusivetie

Performance

Shared video benchmarks

A row appears only when both exact model versions occur in the same LMArena task and stored dataset revision. Text-to-video and image-to-video are never merged into one score.

Veo 3.1 FastGrok Imagine Video
LMArena Text to VideoBlind preference rating from the same task and dataset revision
Veo 3.1 FastNo clear lead1,361.4
Grok Imagine Video1,345.4
LMArena Image to VideoBlind preference rating from the same task and dataset revision
Veo 3.1 Fast1,384.2
Grok Imagine VideoHigher value1,415

Key to the marks:better valuebetter, but not conclusivetie

Shared video benchmarks for Veo 3.1 Fast and Grok Imagine Video
BenchmarkVeo 3.1 FastGrok Imagine VideoSource
LMArena Text to Video
No clear lead1,361.4Rank 11, 95% interval 1,350.9 to 1,371.9, 39,441 votes
1,345.4Rank 14, 95% interval 1,338.2 to 1,352.6, 154,827 votes
LMArenaRetrieved 2026-08-26
LMArena Image to Video
1,384.2Rank 12, 95% interval 1,375.4 to 1,393.1, 99,932 votes
Higher rating1,415Rank 9, 95% interval 1,410.4 to 1,419.5, 517,108 votes
LMArenaRetrieved 2026-08-26

Higher rating is better. A clear lead is shown only when the published 95% intervals do not overlap.

Key to the marks:better valuebetter, but not conclusivetie

Visual comparison

Sample videos

Only runs from both exact model versions under the same archived prompt and first-output rule appear here. Provider showcases and substitute versions remain excluded.

Controlled practical comparison. Both exact model versions received the same archived prompt in one request. The first output counts. Playback uses the first five seconds, 1280 × 720 pixels, 30 fps, no crop, and muted audio. Provider-side randomness and prompt processing remain model characteristics.

Motion and physical consistency

Anatomy, object consistency, camera tracking, rain, and reflections

Veo 3.1 Fast

Run details

fal.ai. fal-ai/veo3.1/fast. 16:9, one request, first output, requested 6 s, seed provider random, 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","duration":"6s","resolution":"720p","generate_audio":false}, configured price estimate $0.60.

Generated Aug 24, 2026. Source

Grok Imagine Video

Run details

fal.ai. xai/grok-imagine-video/text-to-video. 16:9, one request, first output, requested 5 s, seed provider random, 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.","duration":5,"resolution":"720p","aspect_ratio":"16:9"}, configured price estimate $0.35.

Generated Aug 24, 2026. Source

Prompt and integrity hashes

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.

Prompt SHA 256: 206a9182584e93790fd6df608e8a2065fe2c8f747e85aeaaf4c8ea84040e6299

Veo 3.1 Fast, Original SHA 256: eca493f2cf116914b32cae73f70594d09cc83b7bdc1a06c89057f20aa31bb115

Veo 3.1 Fast, Normalized SHA 256: 84d2e0ab28739b205ecdf3a5073fb626440b03b65de3f1d1e566ebe371288a98

Grok Imagine Video, Original SHA 256: 6d2362215e29d87c2b525785a39fa33330412fcd82e84d9a8dbd675eed773853

Grok Imagine Video, Normalized SHA 256: 70d716f422e4d04f193888afdb33ce86b5cc49b18a4f61e2cafa6631c4a5ef74

How to read the data

Preference is not the same as production fit

A higher LMArena rating means that outputs from this exact configuration were preferred more often in blind comparisons.

Motion control, identity consistency, audio, turnaround time, moderation, and licensing may matter more than the aggregate preference rating.

Prices are representative public minute rates, not a normalized cost benchmark.

More matchups

Related video model comparisons

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View the complete video model comparison