CheaperGen
ByteDanceimage

Seedream 4.5 API

2K and 4K images and multi-image edits at one price

bytedance/seedream-4.5/text-to-imagebytedance/seedream-4.5/edit
FromUp to −23%
$0.031/imgOfficial price $0.04

per image · 2K

Operational100% uptime (30 days)median 21s
Create with Seedream 4.5Get API key
API docs →Compare models →

Try Seedream 4.5

Runs on your balance at the price shown on the button. Results are saved to your account.

Open full-screen Studio
0/5000

Output image shape.

2K ≈ 4 megapixels, 4K ≈ 16 megapixels (same price).

Always on here. Set enable_safety_checker to false over the API to turn it off.Always on here. Set enable_safety_checker to false over the API to turn it off.

If set to true, the safety checker will be enabled. Content our Acceptable Use Policy prohibits stays blocked either way.

Estimated cost…

Create a free account with Google or email — pay only for what you generate.

Your image will appear here

Write a prompt, pick your settings and hit Run. You only pay for successful generations.

What is Seedream 4.5?

ByteDance Seedream 4.5 generates and edits images at 2K or 4K for one price per image, with consistent multi-image editing and legible typography.

Up to 4K
≈16 MP outputs
One price
2K and 4K cost the same
Multi-image edit
Combine up to 10 inputs
Text rendering
Legible in-image typography

2K or 4K, one price

Seedream 4.5 renders about 4 or 16 megapixels per image, billed the same either way — print-ready detail without a premium tier.

Consistent edits

Edit with natural language or combine several input images into one shot, keeping faces, products and layouts consistent across the edit.

Seedream 4.5 pricing

Pay per image as you go, with no subscription required. Failed generations are refunded automatically.

TierOfficial priceCheaperGen
2K
≈4 MP
$0.04/img$0.0309/img
With a monthly plan: Pro $0.0307Max $0.0305
4K
≈16 MP
$0.04/img$0.0309/img
With a monthly plan: Pro $0.0307Max $0.0305

Monthly plans lower prices on most models (shown under each price); you can still pay as you go. Pro $499/month · Max $4,999/month. Plan prices don't apply to requests with the safety checker off.

  • Official price: BytePlus ModelArk international list price for seedream-4-5-251128 ($0.04 per output image at 2K and 4K; input images free). Prices verified October 18, 2026.
  • Requests with enable_safety_checker: false (API only) are billed at $0.04 per image.

Specifications

Sizes
2K · 4K
Aspect ratios
1:1 · 4:3 · 3:4 · 16:9 · 9:16 · 3:2 · 2:3 · 21:9
Edit inputs
Up to 10 images
Enable Safety Checker
Default true · can be set to false over the API
Released
Dec 3, 2025

Use Seedream 4.5 via API

One request to start a job, one to fetch the result. Same shape for every model.

Full API reference 
const API = "https://cheapergen.com/api/v1";
const headers = {
  Authorization: `Bearer ${process.env.CHEAPERGEN_API_KEY}`,
  "Content-Type": "application/json",
};

// 1. Submit the job
let job = await fetch(`${API}/run/bytedance/seedream-4.5/text-to-image`, {
  method: "POST",
  headers,
  body: JSON.stringify({
    "prompt": "Editorial product photo of a matte-black espresso machine on travertine, soft window light, 85mm",
    "aspect_ratio": "1:1",
    "size": "2K"
  }),
}).then((r) => r.json());

// 2. Poll until it finishes (or pass webhook_url and skip polling)
while (job.status === "queued" || job.status === "running") {
  await new Promise((r) => setTimeout(r, 3000));
  job = await fetch(`${API}/generations/${job.id}`, { headers }).then((r) => r.json());
}

console.log(job.status === "succeeded" ? job.output.images[0].url : job.error);
Text to Image
bytedance/seedream-4.5/text-to-image
Image Edit
bytedance/seedream-4.5/edit

Example prompts

Hit “Try it” to load a prompt into the playground above.

  • Vintage travel poster for Lisbon, bold headline “LISBOA”, tram on a steep street, warm screen-print texture

    Try it

  • Macro shot of a mechanical watch movement, jewel bearings, shallow depth of field

    Try it

Seedream 4.5 FAQ

Seedream 4.5 is billed per generated image. Failed generations are not charged.

Yes — use Image Edit with one or more input images and describe the change. Reference multiple images to combine products, people and scenes.

Yes, subject to ByteDance's usage policy and our Terms of Service.

Seedream 4.5 costs $0.0309–$0.0309 per image, 23% below the official price. 1,000 2K images cost $30.88. You pay per image, with no subscription needed, and failed generations are refunded. Real projects priced end to end: Seedream 4.5 API cost.

2K: $0.0309/image (official $0.04); 4K: $0.0309/image (official $0.04). The price per image page breaks it down further; every tier is on Seedream 4.5 API pricing.

Use 2K ($0.0309 an image), then render finals at the size you need. Every tier here is already 23% below the official price. In the same family, Seedream 5.0 Flash starts at $0.0154/image. More: Cheapest Seedream 4.5.

Sign up at CheaperGen, add credits and create a key in Dashboard → API keys, then send it as a bearer token. The same key works for Seedream 4.5 and every other model in the catalog; you don't need a ByteDance account. Step by step: Seedream 4.5 API key.

The Seedream 4.5 API documentation covers its 2 endpoints (bytedance/seedream-4.5/text-to-image, bytedance/seedream-4.5/edit): every parameter with its allowed values and default, request and response examples in cURL, Python and Node.js, polling, webhooks and errors. An OpenAPI file is available too.

Besides Seedream 4.5, the Seedream API covers Seedream 5.0 Flash (from $0.0154/image), Seedream 5.0 Pro (from $0.0333/image) and Seedream 5.0 Lite (from $0.0317/image). All run on the same API key; the Seedream API page compares them side by side, and Seedream Latest shows which is newest.

There is no free tier, but no subscription is needed either: credits are prepaid and only successful generations are charged. Failed generations are refunded automatically, and the quote endpoint (POST /v1/quote/{endpoint}) prices any request for free. No code needed: how to use Seedream 4.5 in the Studio.

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Seedream 4.5 is developed by ByteDance. CheaperGen provides API access and does not own the model. Trademarks belong to their respective owners. · Markdown · OpenAPI