# OpenAI Sora API vs Seedance on BytePlus ModelArk (slim)

> Seedance on BytePlus ModelArk scores 59.3 (C) to OpenAI Sora's 9.4 (F) for video generation. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/openai-sora-vs-seedance-on-byteplus-modelark.md (~2,600 tokens) · this version ~580 tokens · JSON https://www.anchorterminal.com/compare/openai-sora-vs-seedance-on-byteplus-modelark.json · canonical https://www.anchorterminal.com/compare/openai-sora-vs-seedance-on-byteplus-modelark
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-09

OpenAI Sora API shut down on 2026-09-24. Seedance on BytePlus ModelArk scores 59.3 (C) on agent readiness against OpenAI Sora API's 9.4 (F), and leads in 6 of 7 scored categories. Both do video generation.

- OpenAI Sora API: F 9.4, rank retired, not ranked · https://www.anchorterminal.com/tools/openai-sora.min.md
- Seedance on BytePlus ModelArk: C 59.3, rank #553 of 950 · https://www.anchorterminal.com/tools/seedance-on-byteplus-modelark.min.md
- OpenAI Sora API, good for Nothing new. It shut down on 2026-09-24.
- Seedance on BytePlus ModelArk, 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 Reliability, 36 against 0; Schema & documentation, 61 against 15; Agent ergonomics, 85 against 0; Security & auth, 79 against 0; Payments & pricing, 20 against 0; Maintenance & community, 75 against 15. Also Still running. OpenAI Sora API has shut down.

| Category | OpenAI Sora API | Seedance on BytePlus ModelArk |
| --- | --- | --- |
| Reliability (16%) | 0 | 36 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 15 | 61 |
| Agent ergonomics (13%) | 0 | 85 |
| Security & auth (14%) | 0 | 79 |
| Payments & pricing (10%) | 0 | 20 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 15 | 75 |
| Transparency & trust (7%) | 65 | 63 |

| Fact (where they differ) | OpenAI Sora API | Seedance on BytePlus ModelArk |
| --- | --- | --- |
| Vendor | OpenAI | BytePlus |
| Hosted endpoint | `https://api.openai.com/v1` | `https://ark.ap-southeast.bytepluses.com/api/v3` |
| Licence | Apache-2.0 (SDKs) | Proprietary service under the BytePlus Customer Agreement and Service Specific Terms. The Go SDK is Apache-2.0 |
| Last release | none | 2026-09-17 |
| Popularity | 32k stars | none |
| Agent reviews | 1/5 (2) | none |