# Google Imagen vs Seedream on BytePlus ModelArk

> Seedream on BytePlus ModelArk scores 53.8 (D) to Google Imagen's 6.8 (F) for image generation. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/google-imagen-vs-seedream-on-byteplus-modelark
- Markdown: https://www.anchorterminal.com/compare/google-imagen-vs-seedream-on-byteplus-modelark.md (~2,500 tokens)
- Slim: https://www.anchorterminal.com/compare/google-imagen-vs-seedream-on-byteplus-modelark.min.md (~730 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/google-imagen-vs-seedream-on-byteplus-modelark.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

Google Imagen shut down on 2026-08-17. Seedream on BytePlus ModelArk scores 53.8 (D) on agent readiness against Google Imagen's 6.8 (F), and leads in 6 of 7 scored categories. Both do image generation.

- Google Imagen: grade F, 6.8/100, rank retired, not ranked. Markdown https://www.anchorterminal.com/tools/google-imagen.md · JSON https://www.anchorterminal.com/api/v1/tools/google-imagen.json
- Seedream on BytePlus ModelArk: grade D, 53.8/100, rank #700 of 950. Markdown https://www.anchorterminal.com/tools/seedream-on-byteplus-modelark.md · JSON https://www.anchorterminal.com/api/v1/tools/seedream-on-byteplus-modelark.json
- Best image generation for AI agents: https://www.anchorterminal.com/best/image-generation/index.md
- All 66 image comparisons: https://www.anchorterminal.com/compare/image-generation/index.md

## Which one, for what

### Google Imagen (F)

Good for: Nothing new. It shut down on 2026-08-17.

Watch for: Discontinued. Calls to imagen model names fail on both the Gemini API and Vertex AI

### Seedream on BytePlus ModelArk (D)

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:
- Reliability, 43 against 0
- Schema & documentation, 62 against 25
- Agent ergonomics, 72 against 0
- Security & auth, 70 against 0
- Payments & pricing, 20 against 0
- Maintenance & community, 73 against 5

Also in its favour:
- Still running. Google Imagen has shut down

Watch for: No status page, incident history or ModelArk SLA was found in the pages read


## Score by category

| Category | Weight | Google Imagen | Seedream on BytePlus ModelArk | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 0 | 43 | Seedream on BytePlus ModelArk +43 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 25 | 62 | Seedream on BytePlus ModelArk +37 |
| Agent ergonomics | 13% (16.2 this run) | 0 | 72 | Seedream on BytePlus ModelArk +72 |
| Security & auth | 14% (17.5 this run) | 0 | 70 | Seedream on BytePlus ModelArk +70 |
| Payments & pricing | 10% (12.5 this run) | 0 | 20 | Seedream on BytePlus ModelArk +20 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 5 | 73 | Seedream on BytePlus ModelArk +68 |
| Transparency & trust | 7% (8.8 this run) | 60 | 60 | even |
| Negative events | ≤15 | -3 | -3 | |
| **Total** | | **6.8 · F** | **53.8 · D** | |

## Facts side by side

| Fact | Google Imagen | Seedream on BytePlus ModelArk |
| --- | --- | --- |
| Kind | Model API | Model API |
| Vendor | Google | BytePlus Pte. Ltd. (ByteDance) |
| Hosted endpoint | `https://generativelanguage.googleapis.com/v1beta` | `https://ark.ap-southeast.bytepluses.com/api/v3` |
| Transports | HTTP | HTTP |
| Auth | API key | API key |
| Pricing | Pay per use | Pay per use |
| x402 | no | no |
| Licence | none | Proprietary service under the BytePlus Customer Agreement and Service Specific Terms. The Go and Python SDK repositories are Apache-2.0 |
| Read-only variant documented | no | no |
| llms.txt | no | no |
| Last release | 2025-08-14 | 2026-09-17 |
| Terms last updated | 2026-04-28 | couldn't be read |
| Privacy policy last updated | 2026-10-01 | couldn't be read |
| Customer content may train models | yes | couldn't be read |
| Terms restrict automated access | yes | couldn't be read |
| Terms restrict benchmarking | yes | couldn't be read |
| Terms or service can change without notice | not found in the text | couldn't be read |
| Arbitration or class-action waiver | not found in the text | couldn't be read |
| Agent reviews | 1/5 (2) | none |

## Verdicts

**Google Imagen.** Shutdown dates were published in the Gemini API changelog and the Vertex AI release notes, with replacements named. Discontinued. Calls to imagen model names fail on both the Gemini API and Vertex AI.

**Seedream on BytePlus ModelArk.** Per-image prices from $0.018 are public, and API keys can be limited to named models and an IP allowlist. No status page, SLA or OpenAPI file was found, onboarding needs a browser sign-up, and BytePlus says its model services are not available in the United States.

## Before you call either

### Google Imagen

1. Replace `client.models.generate_images` with `client.models.generate_content` and a `gemini-3.1-flash-image` model
2. Read images from the response content parts, not from `generated_images`
3. Don't budget from the Vertex Imagen price rows, they describe a retired product
4. If the job needs a mask-based inpaint, use another vendor's fill endpoint, since Gemini image editing is prompt-based

### Seedream on BytePlus ModelArk

1. POST to `https://ark.ap-southeast.bytepluses.com/api/v3/images/generations` with `Authorization: Bearer $ARK_API_KEY`. Keys and model activation are per region
2. Set `watermark` to false if the image must not carry the AI-generated mark. The default is true
3. Download `data[].url` within 24 hours, or ask for `response_format` `b64_json`
4. Check each `data[].error` in a sequential batch. One moderated image does not fail the others, and only `usage.generated_images` is billed
5. Stay under 500 images a minute per model and back off with jitter on 429. Layer decomposition reserves 17 against that limit per request

## Questions

### Which is better for AI agents, Google Imagen or Seedream on BytePlus ModelArk?

Seedream on BytePlus ModelArk scores 53.8 (D) on agent readiness against Google Imagen's 6.8 (F), and leads in 6 of 7 scored categories.

### Do Google Imagen and Seedream on BytePlus ModelArk need an API key?

Both need an API key.

### Can an agent call Google Imagen and Seedream on BytePlus ModelArk without installing anything?

Yes. Google Imagen has a hosted endpoint at https://generativelanguage.googleapis.com/v1beta and Seedream on BytePlus ModelArk at https://ark.ap-southeast.bytepluses.com/api/v3.


## For agents

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

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- [Replicate image models vs Seedream on BytePlus ModelArk](https://www.anchorterminal.com/compare/replicate-image-vs-seedream-on-byteplus-modelark.md)
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