📌 Executive Summary (TL;DR):
ByteDance's Seedream models are a popular choice for product shots, posters, and consistent multi-image edits. Kie.ai sells Seedream 4.5 at $0.0325 per image and Seedream 5.0 Lite at $0.028.

• Best Overall Alternative for 4.5 and 5.0 Lite: Vidgo API lists both at $0.025 per image, 23% and 11% below Kie.ai, with failed jobs refunded automatically.
• Where Kie.ai still wins: Seedream 5.0 Pro ($0.035 at 1K, $0.07 at 2K vs. Vidgo's $0.075) and Seedream 5 Flash ($0.0162, not listed on Vidgo).

Prices were checked against public pricing pages in early October 2026.

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Who Sells Seedream by API, and What It Costs

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Kie.ai vs. Vidgo API, Model by Model

At 200,000 Seedream 4.5 images a month, that is $6,500 on Kie.ai and $5,000 on Vidgo API. If you mostly use Seedream 5.0 Pro, especially at 1K, stay on Kie.ai for that model.

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Why Look Beyond Kie.ai for Seedream

• Seedream 4.5 is still the workhorse. Many production pipelines are tuned for Seedream 4.5, and that is where Kie.ai's discount is smallest (about 19% below the official price).
• Rate limits hit image pipelines first. Kie.ai allows 20 new tasks per 10 seconds per account. Short image jobs reach that ceiling quickly.
• HTTP 200 errors with the real status in a code field, and 14-day file retention.

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The Best Kie.ai Seedream Alternatives

1. Vidgo API — Cheapest Seedream 4.5 and 5.0 Lite

Vidgo API serves Seedream 4.5 as bytedance/seedream/v4.5/text-to-image and bytedance/seedream/v4.5/edit, Seedream 5.0 Lite as bytedance/seedream/v5/lite/text-to-image and bytedance/seedream/v5/lite/edit, and Seedream 5.0 Pro as seedream-v5.0-pro and seedream-v5.0-pro/edit, all through POST /api/generate/submit.

• Strengths: Lowest Seedream 4.5 and 5.0 Lite prices we found, the same price for generation and editing, automatic refunds, and one integration with Nano Banana, GPT Image 2, and video models.
• Trade-offs: Seedream 5.0 Pro costs more than on Kie.ai, and Seedream 5 Flash is not listed.

2. PoYo.ai — Image Generation Next to Chat

PoYo.ai offers Seedream models together with OpenAI-compatible chat, so one balance covers prompt writing and image generation.

3. APIDot — Backup Image Endpoint

APIDot does not charge for failed requests and works as a second provider when your main one throttles.

4. BytePlus ModelArk and fal.ai — List Price

ByteDance's own BytePlus platform and fal.ai charge around $0.04 per Seedream 4.5 image. Use them if you need first-party terms.

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Code: Kie.ai vs. Vidgo API for Seedream 4.5

# Kie.ai: quality "basic" = 2K, "high" = 4K
curl -X POST https://api.kie.ai/api/v1/jobs/createTask \
  -H "Authorization: Bearer $KIE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "seedream/4.5-text-to-image",
    "callBackUrl": "https://your-domain.com/api/callback",
    "input": {
      "prompt": "minimalist poster of a paper crane over a calm lake, Swiss typography",
      "aspect_ratio": "3:4",
      "quality": "basic"
    }
  }'

# Vidgo API
curl -X POST https://api.vidgo.ai/api/generate/submit \
  -H "Authorization: Bearer $VIDGO_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "bytedance/seedream/v4.5/text-to-image",
    "callback_url": "https://your-domain.com/api/webhook",
    "input": {
      "prompt": "minimalist poster of a paper crane over a calm lake, Swiss typography"
    }
  }'

Size and reference-image fields are listed on each model page in the Vidgo API docs.

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Which Seedream Provider Should You Use?

Which Seedream model do you call most?
 │
 ├── Seedream 4.5 ──────────► 【Vidgo API】
 ├── Seedream 5.0 Lite ─────► 【Vidgo API】
 ├── Seedream 5.0 Pro ──────► 【Kie.ai】
 ├── Seedream 5 Flash ──────► 【Kie.ai】
 └── Need first-party terms ► 【BytePlus ModelArk】

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FAQ

What is the cheapest Seedream 4.5 API in 2026?

Vidgo API, at $0.025 per image for both text-to-image and edit. Kie.ai is $0.0325, and BytePlus and fal.ai are around $0.04.

Is Kie.ai cheaper for Seedream 5.0?

For Seedream 5.0 Pro, yes: $0.035 at 1K and $0.07 at 2K versus $0.075 on Vidgo. For Seedream 5.0 Lite, Vidgo is cheaper ($0.025 vs. $0.028).

Does Seedream support image editing?

Yes. Seedream 4.5, 5.0 Lite, and 5.0 Pro all have edit variants that take reference images, and Vidgo prices edits the same as generation.

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👉 Try Seedream on Vidgo API with free trial credits.