Grok Imagine Video vs Sora 2, Veo 3, Seedance, WAN, and Vidu: 2026 comparison

TL;DR

Grok Imagine Video ($0.05/second) competes on price with Seedance 1.5 Pro but caps at 720p while most competitors offer 1080p. Granular duration control (1-second increments up to 15 seconds) and no cold starts are genuine advantages. For budget-conscious social content where 720p is acceptable, Grok is competitive. For 1080p output, WAN 2.6 Flash ($0.125-0.25/5s) or Kling are better value.

Introduction

xAI’s Grok Imagine Video joined the video generation market in early 2026. This guide compares it against the six established competitors: Sora 2, Veo 3.1, Seedance 1.5 Pro, WAN 2.5, WAN 2.6 Flash, and Vidu Q3.

The key question: does Grok’s competitive pricing compensate for the 720p resolution limitation?

Specifications at a glance

Grok’s advantages

Granular duration control: 1-second increments let you generate exactly the clip length you need. Most competitors offer fixed durations (5s, 8s, 10s). For social media content with specific timing requirements (a 7-second Instagram Story, a 12-second clip), this precision is genuinely useful.

No cold starts: Grok’s API infrastructure keeps models warm. First-request latency matches subsequent requests.

Competitive pricing: At $0.05/second, a 10-second clip costs $0.50. This matches Seedance 1.5 Pro and undercuts Sora 2, Veo 3.1, and Vidu Q3 significantly.

Multiple aspect ratios: 7 preset aspect ratios, more than most competitors offer as standard options.

Synchronized audio: Native audio generation alongside video, included in the base price.

The 720p constraint

The critical limitation: Grok Imagine Video caps at 720p. All major competitors offer 1080p output.

For social media content viewed on mobile, 720p is acceptable. For:

• Desktop or TV display
• Professional production
• Any context requiring crisp text in the video
• Content that will be edited or composited

720p creates a visible quality gap versus 1080p competitors.

Cost comparison: 10-second clip at 720p with audio

WAN 2.6 Flash emerges as the strongest value argument against Grok: cheaper, 1080p capable, 15 seconds maximum duration.

When to use each model

Use Grok Imagine Video for:

• Social media content at scale where 720p is sufficient
• Budget-sensitive rapid prototyping
• Content requiring precise non-standard durations
• Projects where audio generation adds value

Use WAN 2.6 Flash for:

• Budget-conscious production requiring 1080p
• Longer clips at lower cost than Grok

Use Seedance 1.5 Pro for:

• Reference-guided generation with ByteDance’s model
• Similar pricing to Grok with ByteDance’s motion quality

Use Sora 2 for:

• Premium cinematic quality
• Complex multi-element scenes
• 20-second maximum duration

Use Veo 3.1 for:

• Highest quality available (Google’s flagship)
• Short, premium hero content

Testing with Apidog

All models are available through WaveSpeedAI’s API.

Grok Imagine Video:

POST https://api.wavespeed.ai/api/v2/xai/grok-imagine-video
Authorization: Bearer {{WAVESPEED_API_KEY}}
Content-Type: application/json

{
  "prompt": "A city street at dusk, people walking, neon signs reflecting on wet pavement",
  "duration": 7,
  "aspect_ratio": "16:9"
}

WAN 2.6 Flash (comparison):

POST https://api.wavespeed.ai/api/v2/alibaba/wan-2-6-flash
Authorization: Bearer {{WAVESPEED_API_KEY}}
Content-Type: application/json

{
  "prompt": "A city street at dusk, people walking, neon signs reflecting on wet pavement",
  "duration": 7,
  "aspect_ratio": "16:9"
}

Create both requests in an Apidog collection with the same prompt variable. Note the output resolution difference in the comparison.

Assertions for both:

Status code is 200
Response body has field id

Both are async. Poll the predictions endpoint for status. When complete, download both and compare quality at 100% zoom — this is where the 720p vs 1080p difference becomes visible.

FAQ

Does Grok Imagine Video support image-to-video?
Check the current WaveSpeedAI documentation for supported modes. Text-to-video with audio is the confirmed capability.

Is 720p actually a problem for mobile-first content?
For content viewed primarily on mobile screens, 720p is generally sufficient. The limitation matters most for content viewed on larger screens or in contexts where quality is the primary value.

How does Grok compare on motion quality to Kling or Seedance?
xAI’s motion model is newer to the market. Current assessments indicate competitive quality for standard scenes; complex motion and character consistency haven’t been as thoroughly benchmarked as established models.

Can I generate 15-second clips at full 720p with audio for $0.75?
Yes, that’s the math. 15 seconds × $0.05/second = $0.75 including audio.

What aspect ratios does Grok support?
7 presets are available. Check WaveSpeedAI’s documentation for the current list as it may expand post-launch.