Seedream 4.5 API

bytedance/seedream-4-5
Seedream 4.5 is ByteDance’s latest high-end AI image generation model, engineered to deliver photorealistic visuals, refined prompt adherence, and enhanced multi-image synthesis.
Output
$0.052 / gen

How to use Seedream 4.5 API

Install any OpenAI-compatible SDK, point it at api.aimlapi.com/v1, and set the model to bytedance/seedream-4-5.
import requests

r = requests.post(
    "https://api.aimlapi.com/v1/images/generations",
    headers={"Authorization": "Bearer " + AIMLAPI_KEY},
    json={
      "model": "bytedance/seedream-4-5",
      "prompt": "A cat holding a sign that says hello"
    },
)
print(r.json())
const r = await fetch("https://api.aimlapi.com/v1/images/generations", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.AIMLAPI_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "model": "bytedance/seedream-4-5",
    "prompt": "A cat holding a sign that says hello"
  }),
});
console.log(await r.json());
curl -X POST https://api.aimlapi.com/v1/images/generations \
  -H "Authorization: Bearer $AIMLAPI_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"bytedance/seedream-4-5","prompt":"A cat holding a sign that says hello"}'

OpenAI-compatible — swap the base URL and it works with your existing SDK.

Seedream 4.5 API Pricing

TypePrice
Output
$0.052 / gen

Seedream 4.5 Benchmarks

BenchmarkScoreWhat it measuresSourceRetrieved
Text-to-Image Arena
1164 (Elo)
Human preference Elo from blind pairwise comparisons of generated images, measured independently by Artificial AnalysisSourceJuly 12, 2026

Seedream 4.5 vs other models

ModelInputOutputContextBest for
Seedream 4.5
This page
$0.052 / gen
Image generation at scale
$0.325 / 1M tokens
$78 / 1M tokens
128K tokens
Image generation at scale
$6.5 / 1M tokens
$39 / 1M tokens
Image generation at scale
Image generation at scale
$0.0195 / MP (variable)
Image generation at scale

Frequently asked questions

Seedream 4.5 takes image, text as input and returns image.

Seedream 4.5 is priced at $0.052 / gen.

Seedream 4.5 is billed per generation — a fixed charge per output rather than by prompt length.

Yes, Seedream 4.5 accepts image input as well as a text prompt.

Seedream 4.5 was built by ByteDance.

Send a request to https://api.aimlapi.com/v1/images/generations with bytedance/seedream-4-5 as the model id.

Yes. Seedream 4.5 is served through AI/ML API, so the same key and endpoint format used for other models applies.

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