Which video model to use: Seedance 2.0 vs 1.5 Pro vs HappyHorse vs Grok Imagine
RelayDance offers four primary video generation models through its OpenAI-compatible API: ByteDance Seedance 2.0 (the latest flagship model), Seedance 1.5 Pro (previous generation), HappyHorse video models (alternative option), and Grok Imagine for video and image generation. Each model has distinct capabilities and performance characteristics. To select the best model for your needs, consider your specific use case, quality requirements, and budget constraints. Live per-model pricing and detailed specifications are available at relaydance.com/models, and comprehensive API documentation can be found at relaydance.com/docs.
Seedance 2.0: Latest Generation Performance
Seedance 2.0 is ByteDance's latest video generation model and represents the current flagship option on RelayDance. As the newest model in the Seedance line, it offers enhanced capabilities over the 1.5 Pro version. You submit video tasks via POST to /v1/video/generations with your model specification, prompt, duration in seconds, and optional metadata including resolution, aspect ratio, and reference media. The model supports up to 9 reference images, 3 reference videos, and 3 audio tracks per request. Most users find Seedance 2.0 delivers superior quality for complex prompts and demanding creative projects, though specific performance metrics vary by use case.
Seedance 1.5 Pro: Proven Stability
Seedance 1.5 Pro is the previous generation model from ByteDance that remains available and reliable for production workflows. This model has established track record through extensive real-world usage and deployment. While it may not match Seedance 2.0's latest capabilities, 1.5 Pro often provides consistent, predictable results and may be preferred for standardized workflows where you have tuned prompts and parameters. The same API endpoints apply: submit requests to /v1/video/generations and poll GET /v1/video/generations/{task_id} until completion. Reference media clips can be up to 15 seconds, supporting the same metadata options as Seedance 2.0.
HappyHorse Video Models: Alternative Option
HappyHorse video models represent an alternative choice within RelayDance's model ecosystem. These models may offer different performance characteristics, computational efficiency, or specialized capabilities compared to the Seedance line. Specific details about HappyHorse's strengths and intended use cases should be reviewed in the current pricing and documentation at relaydance.com/models. Like all RelayDance video models, HappyHorse supports the standard API workflow: submit your prompt and parameters, then poll for results or use webhook callbacks to receive completion notifications at your specified callback URL.
Grok Imagine: Multi-Modal Capabilities
Grok Imagine distinguishes itself as both a video generation model and image generation model, providing multi-modal functionality within a single model family. If your project requires both static image and video outputs, Grok Imagine may streamline your workflow by eliminating the need to switch between different model providers. Submit image requests via POST /v1/images/generations and video requests via /v1/video/generations with model parameter set to Grok Imagine. Grok also includes text models, enabling you to build integrated pipelines that combine text generation, image creation, and video production through a single API.
Comparison and Selection Guide
| Model | Type | Primary Use Case | Key Feature |
|---|---|---|---|
| Seedance 2.0 | Video | Cutting-edge quality, complex prompts | Latest generation flagship |
| Seedance 1.5 Pro | Video | Production workflows, proven stability | Established track record |
| HappyHorse | Video | Alternative efficiency or specialized needs | Different performance profile |
| Grok Imagine | Video and Image | Multi-modal projects requiring both formats | Unified video and image generation |
Selection depends on three factors: output quality requirements (Seedance 2.0 for maximum quality), workflow stability (1.5 Pro for proven performance), cost efficiency (check current rates at relaydance.com/models), and whether you need multi-modal capabilities (Grok Imagine for combined image and video work). RelayDance prices mainstream models 30 percent or more below official list prices, and failed or errored requests are never billed, reducing risk when experimenting.
API Implementation Steps
- Create an API key at relaydance.com/console
- Set Authorization header: Bearer YOUR_API_KEY
- POST your video request to https://relaydance.com/v1/video/generations with model name, prompt, seconds duration, and optional metadata (resolution, aspect ratio, reference media)
- Poll GET https://relaydance.com/v1/video/generations/{task_id} until status shows succeeded or failed, or set metadata.callback_url to receive webhook notification
- Retrieve video URL from the result when status is succeeded
- Pay via USDT or Stripe card for successful requests only
FAQ
Can I reference images or videos in my prompt? Yes. Include up to 9 reference images, 3 reference videos, and 3 audio tracks per request in metadata.content[] array. Reference them in your prompt as @image1, @image2, etc., with clips up to 15 seconds each.
What happens if my video generation fails? Failed or errored requests are never billed. You can retry with adjusted parameters or switch to a different model without cost penalty.
How do I know which model is cheapest? Live per-model rates are published at relaydance.com/models. All mainstream models on RelayDance are priced 30 percent or more below official list prices.