WAN 2.7 vs Seedance 2.0 vs Sora 2 vs Veo 3.1 Fast: Image-to-Video Comparison

All four models are available on WaveSpeedAI. Try them now: WAN 2.7 I2V | Seedance 2.0 I2V | Sora 2 I2V | Veo 3.1 Fast I2V

Image-to-video generation has become one of the most practical AI video workflows: start with a reference frame, describe the motion, and get a clip that preserves your subject’s identity and composition. But the four models available on WaveSpeedAI take very different approaches to the problem.

This comparison focuses specifically on image-to-video capabilities — how each model handles reference image fidelity, motion synthesis, audio, pricing, and creative control.

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Quick Comparison

Feature	WAN 2.7	Seedance 2.0	Sora 2	Veo 3.1 Fast
Resolution	720p / 1080p	1080p	1080p	1080p
Max Duration	15s	10s	12s	8s
Duration Control	Flexible (per second)	Flexible	Fixed tiers (4/8/12s)	Fixed (8s)
Audio	Input audio sync	No	Synchronized generation	Native generation
First/Last Frame	Yes	No	No	No
Negative Prompt	Yes	Yes	No	No
Cost (8s, 1080p)	$1.20	$0.96	$0.80	$1.20 (with audio)
Speed	Fast	Fast	Moderate	Fast (30% faster than standard)

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WAN 2.7 Image-to-Video

Try WAN 2.7 I2V ->

Alibaba’s WAN 2.7 is the most feature-rich option in this comparison. It supports first and last frame control, audio input synchronization, negative prompts, and prompt expansion — giving you more levers to pull than any other model here.

Key Specs

• Resolution: 720p or 1080p
• Duration: 5–15 seconds (flexible, per-second billing)
• Audio: Upload an audio track to guide pacing and mood
• First/Last Frame: Define both start and end frames for controlled transitions
• Negative Prompt: Exclude unwanted elements
• Prompt Expansion: Auto-enrich short prompts

Strengths

• Most flexible duration range (up to 15s)
• First and last frame guidance for scene transitions
• Audio input synchronization for music videos and ads
• 720p option for cost-efficient iteration
• Negative prompt support for artifact control

Limitations

• 720p default requires explicit 1080p selection (at 1.5x cost)
• Newer model with less community feedback than Sora 2 or Veo

API Example

import wavespeed

output = wavespeed.run(
    "alibaba/wan-2.7/image-to-video",
    {
        "image": "https://example.com/photo.jpg",
        "prompt": "Slow zoom out, wind moves through hair, golden hour lighting",
        "duration": 10,
    },
)

print(output["outputs"][0])

Pricing

Duration	720p	1080p
5s	$0.50	$0.75
10s	$1.00	$1.50
15s	$1.50	$2.25

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Seedance 2.0 Image-to-Video

Try Seedance 2.0 I2V ->

ByteDance’s Seedance 2.0 is the successor to the Seedance 1.5 Pro line, delivering improved motion coherence and cinematic quality. It excels at smooth, natural motion synthesis with strong identity preservation from the reference image.

Key Specs

• Resolution: 1080p
• Duration: Up to 10 seconds
• Motion Quality: Smooth camera movement with natural physics
• Negative Prompt: Supported
• Seed Control: Reproducible results

Strengths

• Excellent motion coherence and temporal stability
• Strong subject identity preservation
• Natural camera dynamics (pans, zooms, tracking shots)
• Competitive pricing
• Good prompt fidelity for complex scenes

Limitations

• No audio generation or input
• No first/last frame control
• Shorter maximum duration than WAN 2.7 or Sora 2
• No 720p option for cost-saving iteration

API Example

import wavespeed

output = wavespeed.run(
    "bytedance/seedance-2.0/image-to-video",
    {
        "image": "https://example.com/photo.jpg",
        "prompt": "Character turns to camera, smiles, sunlight catches their eyes",
    },
)

print(output["outputs"][0])

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Sora 2 Image-to-Video

Try Sora 2 I2V ->

OpenAI’s Sora 2 brings its physics-aware generation to image-to-video. It produces some of the most realistic motion in the group, with accurate contact dynamics, cloth simulation, and natural secondary motion. It also generates synchronized audio automatically.

Key Specs

• Resolution: 1080p
• Duration: 4s, 8s, or 12s (fixed tiers)
• Audio: Automatically generated, synchronized with visuals
• Physics: Contact, inertia, and secondary motion simulation
• Temporal Consistency: Minimal flicker or morphing

Strengths

• Best physics simulation — realistic collisions, cloth, hair
• Synchronized audio generation with lip-sync
• Longest maximum duration (12s) at competitive pricing
• Strong identity preservation with parallax and depth
• Wide stylistic range (photorealistic to stylized)

Limitations

• Fixed duration tiers only (no per-second control)
• No first/last frame control
• No negative prompt support
• Content policy restrictions on certain image types

API Example

import wavespeed

output = wavespeed.run(
    "openai/sora-2/image-to-video",
    {
        "image": "https://example.com/photo.jpg",
        "prompt": "Gentle handheld camera, subject walks forward through a busy market",
        "duration": 8,
    },
)

print(output["outputs"][0])

Pricing

Duration	Cost
4s	$0.40
8s	$0.80
12s	$1.20

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Veo 3.1 Fast Image-to-Video

Try Veo 3.1 Fast I2V ->

Google’s Veo 3.1 Fast is the speed-optimized variant of DeepMind’s flagship video model. It produces cinema-quality output at 24fps with native audio generation — ambient sounds, dialogue, and music — all synchronized to the visuals. The “Fast” variant delivers results up to 30% quicker than the standard Veo 3.1.

Key Specs

• Resolution: 1080p (native)
• Duration: Up to 8 seconds
• Frame Rate: 24fps (cinema standard)
• Audio: Native generation (ambient, dialogue, music)
• Speed: ~30% faster than standard Veo 3.1

Strengths

• Highest cinematic quality with native 24fps
• Best audio generation — ambient, dialogue, music, and effects
• Consistent subject identity and color tone preservation
• Natural lighting and perspective accuracy
• Fast generation speed for the quality tier

Limitations

• Shortest maximum duration (8s)
• Highest per-run cost
• No per-second pricing — flat rate per generation
• No first/last frame or negative prompt control

API Example

import wavespeed

output = wavespeed.run(
    "google/veo3.1-fast/image-to-video",
    {
        "image": "https://example.com/photo.jpg",
        "prompt": "Slow cinematic zoom out, wind moves through trees, sunlight flickers across leaves",
    },
)

print(output["outputs"][0])

Pricing

Configuration	Cost
With audio	$1.20
Without audio	$0.80

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Head-to-Head Comparisons

Image Fidelity & Identity Preservation

Capability	WAN 2.7	Seedance 2.0	Sora 2	Veo 3.1 Fast
Subject identity lock	Good	Excellent	Excellent	Excellent
Style/texture preservation	Good	Very good	Very good	Excellent
Composition retention	Very good	Good	Very good	Very good
First/last frame control	Yes	No	No	No

Motion Quality

Capability	WAN 2.7	Seedance 2.0	Sora 2	Veo 3.1 Fast
Camera dynamics	Good	Excellent	Very good	Excellent
Physics realism	Good	Good	Excellent	Very good
Temporal stability	Good	Very good	Excellent	Very good
Secondary motion (hair, cloth)	Good	Very good	Excellent	Very good

Audio

Capability	WAN 2.7	Seedance 2.0	Sora 2	Veo 3.1 Fast
Audio generation	No (input only)	No	Yes	Yes
Audio input sync	Yes	No	No	No
Lip-sync	No	No	Yes	Yes
Ambient/SFX	No	No	Yes	Yes

Cost Efficiency (1080p)

Duration	WAN 2.7	Seedance 2.0	Sora 2	Veo 3.1 Fast
4s	$0.60	$0.48	$0.40	—
8s	$1.20	$0.96	$0.80	$1.20
10s	$1.50	$1.20	—	—
12s	$1.80	—	$1.20	—

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Use Case Recommendations

Choose WAN 2.7 if you need:

• Scene transitions with first and last frame control
• Audio-synced video from an existing music track or voiceover
• Longer clips (up to 15 seconds)
• Budget iteration at 720p before upscaling

Best for: Music videos, transition sequences, audio-visual content, iterative workflows

Choose Seedance 2.0 if you need:

• Smooth, cinematic motion with strong identity preservation
• Cost-effective high-quality 1080p output
• Natural camera dynamics for product and lifestyle content
• Reliable prompt following for complex scene descriptions

Best for: Product videos, social media content, character animation, marketing

Choose Sora 2 if you need:

• Physics-accurate motion — realistic contact, cloth, and secondary dynamics
• Auto-generated audio with lip-sync for speaking characters
• Longer clips (up to 12s) at competitive pricing
• Wide stylistic range from photorealistic to anime

Best for: Narrative content, character-driven videos, ads with dialogue, creative storytelling

Choose Veo 3.1 Fast if you need:

• Cinema-grade quality at 24fps with the best visual fidelity
• Rich audio generation — ambient, dialogue, music, and effects
• Fast turnaround on high-quality output
• Professional-grade lighting and color preservation

Best for: Film-quality shorts, premium ads, cinematic social content, professional presentations

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The Verdict

There is no single “best” image-to-video model — each fills a distinct niche:

• WAN 2.7 is the Swiss Army knife: most features, most flexibility, best for workflows that need audio input sync or frame-to-frame control.
• Seedance 2.0 delivers the best value for high-quality motion at the lowest cost per second.
• Sora 2 leads on physics realism and is the only model with both auto-generated audio and 12-second clips at $0.10/s.
• Veo 3.1 Fast produces the most cinematic output with the best native audio, but at a premium price and shorter duration.

The good news: all four are available on WaveSpeedAI with the same API pattern, so you can test each one on your actual reference images and compare the results directly.

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Try them all on WaveSpeedAI:

• WAN 2.7 Image-to-Video
• Seedance 2.0 Image-to-Video
• Sora 2 Image-to-Video
• Veo 3.1 Fast Image-to-Video