ByteDanceimage

Seedream 4.5 Text to Image API

Name: Seedream 4.5 API
Brand: ByteDance
SKU: bytedance/seedream-4.5
Availability: InStock

Text to Image with Seedream 4.5 by ByteDance. 2K and 4K images and multi-image edits at one price.

bytedance/seedream-4.5/text-to-image

FromUp to −23%

$0.031/img$0.04

per image · 2K

Operational100% uptime (30 days)median 21s

Create with Seedream 4.5 Get API key

API docs →Compare models →

Try Seedream 4.5 Text to Image

Prompt*

0/5000

Aspect ratio

Output image shape.

Size

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

Enable Safety Checker

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.

Also available: Seedream 4.5 Image Edit

See the Seedream 4.5 examples and prompts

Seedream 4.5 Text to Image API

POST/api/v1/run/bytedance/seedream-4.5/text-to-image

Submits an asynchronous job and returns 202 with a generation id. Poll GET /api/v1/generations/{id} or pass webhook_url. See job lifecycle.

Input parameters

Name	Type	Description	Affects price
`prompt`required	string	Describe the shot: subject, action, camera movement, lighting and style.	No
`aspect_ratio`	string (enum)	Output image shape. Values: 1:1 · 4:3 · 3:4 · 16:9 · 9:16 · 3:2 · 2:3 · 21:9 Default: 1:1	Yes
`size`	string (enum)	2K ≈ 4 megapixels, 4K ≈ 16 megapixels (same price). Values: 2K · 4K Default: 2K	Yes
`seed`	integer	Use the same seed and settings to reproduce a result. Leave empty for random.	No
`enable_safety_checker`	boolean	If set to true, the safety checker will be enabled. Content our Acceptable Use Policy prohibits stays blocked either way. Default: true	No
`webhook_url`	string (URL)	Optional. We POST the finished generation here, signed with your webhook secret. Webhooks	No

Request

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);

import os, time, requests

API = "https://cheapergen.com/api/v1"
headers = {"Authorization": f"Bearer {os.environ['CHEAPERGEN_API_KEY']}"}

# 1. Submit the job
job = requests.post(f"{API}/run/bytedance/seedream-4.5/text-to-image", headers=headers, json={
    "prompt": "Editorial product photo of a matte-black espresso machine on travertine, soft window light, 85mm",
    "aspect_ratio": "1:1",
    "size": "2K"
}).json()

# 2. Poll until it finishes (or pass "webhook_url" and skip polling)
while job["status"] in ("queued", "running"):
    time.sleep(3)
    job = requests.get(f"{API}/generations/{job['id']}", headers=headers).json()

print(job["status"], job["output"]["images"][0]["url"] if job["status"] == "succeeded" else job["error"])

curl -X POST https://cheapergen.com/api/v1/run/bytedance/seedream-4.5/text-to-image \
  -H "Authorization: Bearer $CHEAPERGEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "prompt": "Editorial product photo of a matte-black espresso machine on travertine, soft window light, 85mm",
  "aspect_ratio": "1:1",
  "size": "2K"
}'

Response

{
  "id": "gen_8c2QmX1nq0k4",
  "object": "generation",
  "model": "bytedance/seedream-4.5",
  "endpoint": "bytedance/seedream-4.5/text-to-image",
  "mode": "text-to-image",
  "status": "queued",
  "input": {
    "prompt": "Editorial product photo of a matte-black espresso machine on travertine, soft window light, 85mm",
    "aspect_ratio": "1:1",
    "size": "2K"
  },
  "output": null,
  "error": null,
  "cost": {
    "amount_usd": 0.2255,
    "currency": "usd",
    "estimated": true,
    "official_usd": null,
    "list_price_source": "official",
    "list_price_label": "Official",
    "saved_usd": null
  },
  "source": "api",
  "started_at": null,
  "completed_at": null,
  "urls": {
    "get": "https://cheapergen.com/api/v1/generations/gen_8c2QmX1nq0k4",
    "cancel": "https://cheapergen.com/api/v1/generations/gen_8c2QmX1nq0k4/cancel"
  },
  "created_at": "2026-10-15T09:21:04Z"
}

{
  "id": "gen_8c2QmX1nq0k4",
  "object": "generation",
  "model": "bytedance/seedream-4.5",
  "endpoint": "bytedance/seedream-4.5/text-to-image",
  "mode": "text-to-image",
  "status": "succeeded",
  "input": {
    "prompt": "Editorial product photo of a matte-black espresso machine on travertine, soft window light, 85mm",
    "aspect_ratio": "1:1",
    "size": "2K"
  },
  "output": {
    "images": [
      {
        "url": "https://cdn.cheapergen.com/outputs/gen_8c2Q-0.png",
        "content_type": "image/png",
        "width": 2048,
        "height": 2048
      }
    ]
  },
  "error": null,
  "cost": {
    "amount_usd": 0.2255,
    "currency": "usd",
    "estimated": false,
    "official_usd": 0.264,
    "list_price_source": "official",
    "list_price_label": "Official",
    "saved_usd": 0.0385
  },
  "source": "api",
  "created_at": "2026-10-15T09:21:04Z",
  "started_at": "2026-10-15T09:21:06Z",
  "completed_at": "2026-10-15T09:22:31Z"
}

Seedream 4.5 pricing

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

Tier	Official price	CheaperGen	You save
2K ≈4 MP	~~$0.04~~/img	$0.0309/img With a monthly plan: Pro $0.0307Max $0.0305	−23%
4K ≈16 MP	~~$0.04~~/img	$0.0309/img With a monthly plan: Pro $0.0307Max $0.0305	−23%

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.