Hy4 preview vs Seedance 1.5 Pro: Features, Pricing & Which Is Better (2026)
A side-by-side comparison of Hy4 preview and Seedance 1.5 Pro — features, pricing, and ideal use cases — to help you decide which AI tool fits your workflow.
Hy4 preview
Tencent
Tencent's open-weight Hy4 preview, a 770B-parameter Mixture-of-Experts model with 49B active parameters and a 1M-token context window.
Key features
- 770B Mixture-of-Experts Architecture: Holds 770 billion total parameters while activating only 49 billion per token, so capacity scales without proportional inference cost.
- 1M-Token Context Window: Accepts inputs exceeding one million tokens, allowing whole codebases, long document sets or extended agent traces in a single prompt.
- Apache 2.0 Open Weights: Released under a permissive licence that allows commercial use, modification and redistribution with no separate agreement.
- Productivity Task Focus: Tuned for real-world coding, office work and scientific research rather than narrow benchmark optimisation.
- Multi-Product Availability: Accessible globally through Tencent's WorkBuddy, CodeBuddy, Yuanbao and ima applications in addition to the raw weights.
- API Access via TokenHub and OpenRouter: Can be called through Tencent Cloud TokenHub or OpenRouter for teams that prefer hosted inference over self-hosting.
Best for
- Whole-Repository Code Work: Load an entire codebase into the million-token context to reason about refactors and cross-file dependencies at once.
- Long-Horizon Agent Tasks: Drive multi-step agent workflows where the full history of tool calls and intermediate results must stay in context.
- Self-Hosted Deployment: Run a frontier-scale open-weight model on private infrastructure where data cannot leave the organisation.
- Scientific Literature Analysis: Ingest large collections of papers or experimental logs and synthesise findings without chunking the input.
- Office Document Processing: Summarise, draft and restructure long reports, contracts and spreadsheets in enterprise workflows.
- Commercial Fine-Tuning: Adapt the weights for a proprietary product under the Apache 2.0 licence without negotiating a model licence.
Seedance 1.5 Pro
ByteDance
Next-gen video generator that converts text or images into high-quality cinematic videos with one-click creation.
Key features
- Text-to-Video Generation: Converts written prompts into multi-frame video sequences, enabling users to create cinematic scenes directly from descriptive text.
- Image-to-Video Conversion: Animates static images by transforming them into dynamic video output, allowing users to bring photos and still artwork to life.
- One-Click Cinematic Creation: Streamlines the production workflow with single-click generation that produces polished, cinematic-style videos for rapid prototyping and content creation.
- Multiple Editions Support: Available in Seedance 1.5 Pro and Seedance Pro editions to accommodate different user needs and fidelity requirements.
- Web-Based Access: Operates through a web interface, requiring no local installation and enabling users to generate videos from browsers.
- Free Trial Availability: Offers a free trial option so users can test generation capabilities and output quality before committing to paid tiers.
- Text-to-video generation from natural-language prompts
- Image-to-video generation from static images
- One-click cinematic scene creation
- High-quality / cinematic output
- Web-accessible interface with free trial availability
Best for
- Social Media Content Creation: Quickly produce short cinematic clips from captions or images to create engaging posts and stories for platforms like TikTok and Instagram.
- Marketing and Ad Production: Generate concept video creatives and promotional snippets from brief creative briefs or product images for rapid campaign iteration.
- Storyboarding and Previsualization: Turn scene descriptions into moving visuals to explore camera framing, mood, and motion during early stages of film or animation development.
- Rapid Filmmaker Prototyping: Visualize and iterate on scene ideas and shot concepts without full production, speeding up creative decision-making.
- Educational and Demonstrative Videos: Create illustrative motion content from images or explanatory text for tutorials, lessons, and presentations.
- Social media content creation and short-form videos
- Rapid concept visualization for filmmakers and VFX artists
- Marketing and promotional video generation
- Storyboarding and previsualization from prompts or images
- Prototype and demo videos for product presentations