Introducing ByteDance Seedance V1.5 Pro Text-to-Video Fast on WaveSpeedAI
ByteDance Seedance 1.5 Pro Fast Is Now Live on WaveSpeedAI
The race for AI video generation supremacy just got more exciting. ByteDance has raised the bar with Seedance 1.5 Pro, and we’re thrilled to announce that the Fast variant for text-to-video generation is now available on WaveSpeedAI. This production-ready model delivers cinematic quality, synchronized audio, and unprecedented speed—all accessible through a simple API with no cold starts.
What is Seedance 1.5 Pro Fast?
Seedance 1.5 Pro Fast represents ByteDance’s most advanced text-to-video technology, building on the foundation that made Seedance 1.0 the top-ranked model on Artificial Analysis benchmarks. While the original Seedance already outperformed Google Veo 3, OpenAI Sora, and Kuaishou Kling 2.0 across both text-to-video and image-to-video leaderboards, the 1.5 Pro Fast variant takes things further with joint audio-video generation and optimized inference speed.
At its core, Seedance 1.5 Pro Fast uses a dual-branch diffusion transformer architecture that renders video and audio in the same latent space. This means you get tight lip-sync, natural foley sounds, and perfectly synchronized audio—all generated together without post-production work. The result is cinematic content that feels complete right out of the generation pipeline.
ByteDance officially launched Seedance 1.5 Pro in December 2024, and it has quickly become a go-to solution for creators who need production-quality video without the traditional bottlenecks of AI generation times.
Key Features
Cinematic Text-to-Video Generation Transform natural language prompts into polished video clips ranging from 4 to 12 seconds. The model excels at interpreting complex scenes, handling subjects, actions, environments, lighting, and mood with remarkable precision.
Joint Audio-Video Synthesis Unlike models that treat audio as an afterthought, Seedance 1.5 Pro generates sound and vision together. Character dialogue features precise lip-sync, and environmental sounds match the visual action naturally—supporting multiple languages and dialects.
Flexible Output Options
- Resolutions: 720p for rapid iteration, 1080p for final production
- Aspect Ratios: 9:16 (vertical shorts), 1:1 (social feeds), 16:9 (widescreen), plus 21:9, 4:3, and 3:4
- Duration Control: 4–12 second clips with smart duration options
Advanced Camera Control Execute complex camera movements including long tracking shots and Hitchcock zooms. The optional camera-fixed mode locks your framing when you need stable compositions.
Seed Reproducibility Lock in a seed value to reproduce results exactly, making it simple to iterate on prompts while keeping visual consistency. This is invaluable for A/B testing creative directions.
Production-Grade Speed The “Fast” variant lives up to its name. On optimized infrastructure, Seedance can generate a 5-second 1080p clip in around 41 seconds—2-4x faster than many competing models without sacrificing quality.
Use Cases
Advertising and Marketing
Create polished ad creatives without the overhead of traditional video production. The strong prompt adherence means your brand messaging translates accurately to screen, while the joint audio generation eliminates the need for separate sound design passes.
Short-Form Content and Social Media
Vertical video for TikTok, Reels, and Shorts becomes trivially easy. Generate multiple variations with different aspect ratios from the same prompt, then pick the winner. The 4-12 second duration range hits the sweet spot for attention-grabbing social content.
Film Pre-visualization and Concept Development
Directors and creative teams can rapidly visualize scenes before committing to expensive shoots. The cinematic camera capabilities and expressive motion bring storyboards to life, helping stakeholders align on creative direction early.
Short Drama and Narrative Content
Seedance 1.5 Pro was explicitly designed for short-drama workflows where aesthetic stability, emotion-rich acting, and controllable duration matter. The model handles multi-character interactions while maintaining spatial relationships and consistent visual style.
E-Commerce Product Videos
Transform static product descriptions into dynamic video content. Showcase products in motion, demonstrate use cases, and create lifestyle content at scale.
Getting Started on WaveSpeedAI
Getting up and running takes just minutes:
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Visit the Model Page: Head to Seedance 1.5 Pro Fast (Text-to-Video) on WaveSpeedAI.
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Craft Your Prompt: Write prompts like a director’s brief—specify your subject, action, scene, and mood. For example: “A young woman in a vintage bookshop, golden afternoon light streaming through dusty windows, she reaches for an old leather-bound book on a high shelf, camera slowly pushes in.”
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Configure Output Settings: Select your aspect ratio (9:16 for shorts, 16:9 for widescreen), resolution (720p for drafts, 1080p for finals), and duration.
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Generate: Hit run and receive your video. Toggle audio generation on or off depending on your workflow.
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Iterate: Use seed values to lock in looks you like while refining prompts.
Pricing That Makes Sense
WaveSpeedAI offers transparent, predictable pricing:
| Resolution | With Audio | Price per Second |
|---|---|---|
| 720p | Yes | $0.04 |
| 720p | No | $0.02 |
| 1080p | Yes | $0.06 |
| 1080p | No | $0.03 |
A 5-second 1080p clip with audio costs just $0.30. A 12-second full-quality clip runs $0.72. No hidden fees, no cold start delays, no capacity surprises.
Why Choose WaveSpeedAI?
Zero Cold Starts: Your requests begin processing immediately. No waiting for instances to spin up.
Ready-to-Use REST API: Integrate Seedance 1.5 Pro Fast into your existing workflows with straightforward API calls. No complex setup or infrastructure management required.
Predictable Pricing: Pay only for what you generate with clear per-second rates. Scale up or down based on your needs without commitment.
Production Reliability: Built for stable production use, WaveSpeedAI delivers consistent performance whether you’re generating one clip or thousands.
Start Creating Today
The AI video generation landscape is evolving rapidly, and Seedance 1.5 Pro Fast represents the current state of the art for text-to-video with synchronized audio. Whether you’re a solo creator experimenting with new content formats or an enterprise team building video generation into your product, this model delivers the quality, speed, and reliability you need.
Experience the future of AI video generation. Try Seedance 1.5 Pro Fast on WaveSpeedAI and transform your text into cinematic reality.
