models/ByteDance/Seedream 4.5

ByteDance

Seedream 4.5

image

Compare

Seedream 4.5 builds on 4.0 with multi-reference image support, batch generation, and sequential image generation.

MODALITIES

image

PER IMAGE

$0.040

USAGE

613 req

0% market share

RELEASED

2026-05-22

Seedream 4.5 (bytedance/seedream-4.5) is a image model from ByteDance, released 2026-05-22. Pricing via AIgateway: $0.040 per image. Call it via https://api.aigateway.sh/v1/images/generations — set model="bytedance/seedream-4.5".

model · bytedance/seedream-4.5family · Seedream

Use this model

model: bytedance/seedream-4.5

curl https://api.aigateway.sh/v1/images/generations \
  -H "Authorization: Bearer $AIGATEWAY_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"bytedance/seedream-4.5","prompt":"a serene cyberpunk city at dusk"}'

curl https://api.aigateway.sh/v1/images/generations \ -H "Authorization: Bearer $AIGATEWAY_API_KEY" \ -H "Content-Type: application/json" \ -d '{"model":"bytedance/seedream-4.5","prompt":"a cyberpunk cat"}'

Capabilities

Text to image

Adoption

613 requests

0% of tracked market demand

See the full leaderboard →

Aggregate demand across the open model ecosystem (as of 2026-09-11).

Pricing

Per image$0.040

You pay pass-through pricing.

See API example →Compare API reference See usage ranking →

Collections

More image models →More from ByteDance →Frontier models →Free-tier models →

API schema

Call Seedream 4.5 from any OpenAI SDK

POST https://api.aigateway.sh/v1/images/generations·Content-Type: application/json·Auth: Bearer sk-aig-...

Request body

json

{
  "model": "bytedance/seedream-4.5",
  "prompt": "A cyberpunk cat at sunset, cinematic lighting",
  "n": 1,
  "size": "1024x1024",
  "response_format": "url"   // or "b64_json"
}

Response

json

{
  "created": 1776947082,
  "data": [
    { "url": "https://media.aigateway.sh/img/abc123.png" }
    // or { "b64_json": "iVBORw0KGgoAAAANSUhEU..." }
  ]
}

Quickstart

from openai import OpenAI
client = OpenAI(base_url="https://api.aigateway.sh/v1", api_key="sk-aig-...")

r = client.images.generate(
    model="bytedance/seedream-4.5",
    prompt="a cyberpunk cat at sunset",
    size="1024x1024",
)
print(r.data[0].url)

Errors

401authentication_errorInvalid or missing API key

402insufficient_creditsWallet empty (PAYG only)

404not_foundUnknown model or endpoint

429rate_limit_errorOver per-minute limit — see Retry-After header

500server_errorUpstream provider failed (retryable)

503service_unavailableUpstream saturated (retryable)

Full docs →API reference →OpenAPI spec →llms.txt →

Frequently asked questions

What is Seedream 4.5?

Seedream 4.5 builds on 4.0 with multi-reference image support, batch generation, and sequential image generation. It is a image model from ByteDance, accessible via AIgateway's OpenAI-compatible API at slug bytedance/seedream-4.5.

How much does Seedream 4.5 cost via AIgateway?

$0.0400 per image, billed pass-through.

How do I call Seedream 4.5 from my code?

Point the OpenAI SDK at https://api.aigateway.sh/v1 with your AIgateway key and set model to "bytedance/seedream-4.5". The request and response shapes match OpenAI exactly.

Does Seedream 4.5 support streaming, tool calling, vision, and JSON mode?

Streaming — no. Tool calling — no. Vision — no. JSON mode — no. Prompt caching — no.

Can I bring my own ByteDance API key (BYOK)?

Yes. Attach a ByteDance key in your AIgateway dashboard and this model flips to pass-through — you pay ByteDance directly and AIgateway adds no platform fee on those calls.