# Iris-3B vs Seedream on BytePlus ModelArk (slim)

> Seedream on BytePlus ModelArk scores 53.8 (D) to Iris-3B's 50.9 (D) for image generation. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/iris-3b-vs-seedream-on-byteplus-modelark.md (~2,800 tokens) · this version ~780 tokens · JSON https://www.anchorterminal.com/compare/iris-3b-vs-seedream-on-byteplus-modelark.json · canonical https://www.anchorterminal.com/compare/iris-3b-vs-seedream-on-byteplus-modelark
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-15
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Seedream on BytePlus ModelArk scores 53.8 (D) on agent readiness against Iris-3B's 50.9 (D), and leads in 5 of 7 scored categories. Iris-3B leads on payments & pricing. Both do image generation.

- Iris-3B: D 50.9, rank #826 of 1094 · https://www.anchorterminal.com/tools/iris-3b.min.md
- Seedream on BytePlus ModelArk: D 53.8, rank #750 of 1094 · https://www.anchorterminal.com/tools/seedream-on-byteplus-modelark.min.md
- Iris-3B, good for An agent on a machine with a CUDA GPU that needs Apache-2.0 image generation, relative depth or 4x restoration without a vendor account. Ahead on Payments & pricing, 60 against 20. Also No key needed to call it; Free to start without a card; Open source; No incidents deducted, where Seedream on BytePlus ModelArk loses 3 points for them.
- Seedream on BytePlus ModelArk, good for Agents that need ByteDance's Seedream models first-hand, multi-reference edits, 4K output or layered PNG output at a published per-image price, for users outside the United States. Ahead on Schema & documentation, 62 against 47; Agent ergonomics, 72 against 54; Security & auth, 70 against 44; Transparency & trust, 60 against 47. Also A hosted endpoint, with nothing to install.

| Category | Iris-3B | Seedream on BytePlus ModelArk |
| --- | --- | --- |
| Reliability (16%) | 45 | 43 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 47 | 62 |
| Agent ergonomics (13%) | 54 | 72 |
| Security & auth (14%) | 44 | 70 |
| Payments & pricing (10%) | 60 | 20 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 70 | 73 |
| Transparency & trust (7%) | 47 | 60 |

| Fact (where they differ) | Iris-3B | Seedream on BytePlus ModelArk |
| --- | --- | --- |
| Vendor | Speridlabs | BytePlus Pte. Ltd. (ByteDance) |
| Hosted endpoint | no (local only) | `https://ark.ap-southeast.bytepluses.com/api/v3` |
| Transports |  | HTTP |
| Auth | None | API key |
| Pricing | Free | Pay per use |
| Licence | Apache-2.0 (code and weights) | Proprietary service under the BytePlus Customer Agreement and Service Specific Terms. The Go and Python SDK repositories are Apache-2.0 |
| Last release | 2026-10-12 | 2026-09-17 |
| Terms last updated | no document linked | couldn't be read |
| Privacy policy last updated | no document linked | couldn't be read |
| Customer content may train models |  | couldn't be read |
| Terms restrict automated access |  | couldn't be read |
| Terms restrict benchmarking |  | couldn't be read |
| Terms or service can change without notice |  | couldn't be read |
| Arbitration or class-action waiver |  | couldn't be read |
| Popularity | 175 stars | none |