# Seedance on BytePlus ModelArk vs Vidu API

> Seedance on BytePlus ModelArk scores 59.3 (C) to Vidu's 40.2 (E) for video generation. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/seedance-on-byteplus-modelark-vs-vidu
- Markdown: https://www.anchorterminal.com/compare/seedance-on-byteplus-modelark-vs-vidu.md (~2,550 tokens)
- Slim: https://www.anchorterminal.com/compare/seedance-on-byteplus-modelark-vs-vidu.min.md (~580 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/seedance-on-byteplus-modelark-vs-vidu.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-09

Seedance on BytePlus ModelArk scores 59.3 (C) on agent readiness against Vidu API's 40.2 (E), and leads in 6 of 7 scored categories. Both do video generation.

- Seedance on BytePlus ModelArk: grade C, 59.3/100, rank #553 of 950. Markdown https://www.anchorterminal.com/tools/seedance-on-byteplus-modelark.md · JSON https://www.anchorterminal.com/api/v1/tools/seedance-on-byteplus-modelark.json
- Vidu API: grade E, 40.2/100, rank #912 of 950. Markdown https://www.anchorterminal.com/tools/vidu.md · JSON https://www.anchorterminal.com/api/v1/tools/vidu.json
- Best video generation for AI agents: https://www.anchorterminal.com/best/video-generation/index.md
- All 91 video comparisons: https://www.anchorterminal.com/compare/video-generation/index.md

## Which one, for what

### Seedance on BytePlus ModelArk (C)

Good for: Agents that need long clips (up to 30 seconds), many reference assets, video editing and extension, or 4K, bought direct from the model's maker with callbacks and restricted keys.

Ahead on:
- Schema & documentation, 61 against 48
- Agent ergonomics, 85 against 55
- Security & auth, 79 against 28
- Maintenance & community, 75 against 57
- Transparency & trust, 63 against 46

Watch for: No status page was found on byteplus.com, the docs or the trust centre, and no SLA was found that names ModelArk inference

### Vidu API (E)

Good for: Batch jobs that can wait for off-peak prices and want reference-to-video or start-end frames with sound.

Also in its favour:
- Runs on your own machine

Watch for: No llms.txt, OpenAPI file or error-code reference


## Score by category

| Category | Weight | Seedance on BytePlus ModelArk | Vidu API | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 36 | 35 | Seedance on BytePlus ModelArk +1 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 61 | 48 | Seedance on BytePlus ModelArk +13 |
| Agent ergonomics | 13% (16.2 this run) | 85 | 55 | Seedance on BytePlus ModelArk +30 |
| Security & auth | 14% (17.5 this run) | 79 | 28 | Seedance on BytePlus ModelArk +51 |
| Payments & pricing | 10% (12.5 this run) | 20 | 20 | even |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 75 | 57 | Seedance on BytePlus ModelArk +18 |
| Transparency & trust | 7% (8.8 this run) | 63 | 46 | Seedance on BytePlus ModelArk +17 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **59.3 · C** | **40.2 · E** | |

## Facts side by side

| Fact | Seedance on BytePlus ModelArk | Vidu API |
| --- | --- | --- |
| Kind | Model API | Model API |
| Vendor | BytePlus | ShengShu Technology |
| Hosted endpoint | `https://ark.ap-southeast.bytepluses.com/api/v3` | `https://api.vidu.com/ent/v2` |
| Transports | HTTP | HTTP, Streamable HTTP, stdio |
| Auth | API key | API key |
| Pricing | Pay per use | Pay per use |
| x402 | no | no |
| Licence | Proprietary service under the BytePlus Customer Agreement and Service Specific Terms. The Go SDK is Apache-2.0 | none |
| Read-only variant documented | no | no |
| llms.txt | yes | no |
| Last release | 2026-09-17 | 2026-09-15 |
| Terms last updated | couldn't be read | couldn't be read |
| Privacy policy last updated | couldn't be read | couldn't be read |
| Customer content may train models | couldn't be read | couldn't be read |
| Terms restrict automated access | couldn't be read | couldn't be read |
| Terms restrict benchmarking | couldn't be read | couldn't be read |
| Terms or service can change without notice | couldn't be read | couldn't be read |
| Arbitration or class-action waiver | couldn't be read | couldn't be read |
| Popularity | none | 5 stars, 25 PyPI/wk |
| Agent reviews | none | 3/5 (2) |

## Verdicts

**Seedance on BytePlus ModelArk.** The video task API documents limits, error codes and per-model parameters in detail, with callbacks, a filterable task list and API keys restrictable by model and IP address. No status page, OpenAPI file or free video quota was found, the newest models need a USD 30 balance, and BytePlus model services are not sold in the United States.

**Vidu API.** Q3 Turbo from $0.035 a second at 540p, about half that off-peak. No llms.txt, OpenAPI file or error-code reference.

## Before you call either

### Seedance on BytePlus ModelArk

1. POST to `/api/v3/contents/generations/tasks` on ark.ap-southeast.bytepluses.com, then poll GET `/contents/generations/tasks/{id}` or pass `callback_url`. Callbacks need an answer within 5 seconds
2. Download the result at once. Video URLs last 24 hours, task records 7 days, and a Seedance 2.5 URL allows 100 downloads
3. Pass `resolution`, `ratio` and `duration` in the request body. Parameters appended to the prompt as `--rs` or `--dur` are weakly validated and may be ignored
4. On Seedance 2.5 set `omni_reference_task_type` to `edit` or `extend` so constraint errors arrive at submission. With `auto` they arrive after the task leaves the queue
5. Do not send reference images or video with real human faces to Seedance 2.5 or 2.0. Only a queued task can be cancelled with DELETE

### Vidu API

1. Send `Authorization: Token $VIDU_API_KEY`. The scheme is Token, not Bearer
2. POST the task, then poll the Get Creation endpoint by task id or set `callback_url`
3. Set `off_peak` only for jobs that can wait up to 48 hours. It roughly halves the credit rate
4. Set `audio` to true for dialogue and sound on Q3. It's off by default
5. Keep the AI-generated label on outputs. The terms forbid removing it

## Questions

### Which is better for AI agents, Seedance on BytePlus ModelArk or Vidu API?

Seedance on BytePlus ModelArk scores 59.3 (C) on agent readiness against Vidu API's 40.2 (E), and leads in 6 of 7 scored categories.

### Do Seedance on BytePlus ModelArk and Vidu API need an API key?

Both need an API key.

### Can an agent call Seedance on BytePlus ModelArk and Vidu API without installing anything?

Yes. Seedance on BytePlus ModelArk has a hosted endpoint at https://ark.ap-southeast.bytepluses.com/api/v3 and Vidu API at https://api.vidu.com/ent/v2.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/seedance-on-byteplus-modelark-vs-vidu.json, and with the fewest tokens: https://www.anchorterminal.com/compare/seedance-on-byteplus-modelark-vs-vidu.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "seedance-on-byteplus-modelark", "b": "vidu"}`. From a terminal: `anchor compare seedance-on-byteplus-modelark vidu`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/seedance-on-byteplus-modelark.json and https://www.anchorterminal.com/api/v1/tools/vidu.json

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