Seedream 4.5 API

Q: What is the Seedream 4.5 model ID?

Use bytedance/seedream-4-5 as the model parameter. Requests go to https://api.aimlapi.com/v1/images/generations with your AI/ML API key.

Try this model

ByteDance Seedream 4.5 is an advanced text-to-image model with improved prompt adherence and visual quality.

Modalities: Text, ImageImage
Price: $0.04per generation
Model type: Image generation
Released: Dec 4, 2025

Seedream 4.5 overview

Seedream 4.5 by ByteDance

It excels in rendering sharp, legible text directly within images, ideal for branded and advertising content.

Seedream 4.5 specs

Model ID: bytedance/seedream-4-5
Developer: ByteDance
Input: Text, Image
Output: Image
Endpoint: POST https://api.aimlapi.com/v1/images/generations

Seedream 4.5 API Overview

Seedream 4.5 represents ByteDance's latest advancement in generative AI, delivering high-fidelity 4K images with exceptional prompt adherence and editing precision. This model excels in realistic rendering, multi-subject consistency, and professional workflows, making it ideal for creators seeking photorealistic outputs from text descriptions.

Technical Specifications

Input Support: Up to 14 reference images (JPEG, PNG, WEBP, BMP, TIFF, GIF, HEIC, HEIF).
Output Resolution: Native 2K to 4K rendering with flexible aspect ratios.
Architecture: Unified framework for text-to-image generation and advanced editing, scaled for improved semantic understanding and typography.

Performance Benchmarks

Seedream 4.5 demonstrates top-tier results on internal metrics, outperforming predecessors in prompt alignment, aesthetics, and editing accuracy. It achieves higher ELO ratings for realism and consistency, with cleaner high-resolution outputs and fewer corrections needed. Benchmarks highlight its edge in photorealism, text rendering, and logical scene inference over models like Seedream 4.0.

Key Features

Enhanced Prompt Interpretation: Accurately processes complex scenes, spatial relationships, multi-person interactions, and action cues for precise visual results.
Superior Image Consistency: Maintains subject identity, lighting, and details across multi-angle views and image sets, minimizing artifacts.
Advanced Editing Tools: Seamlessly blends reference images, refines details like skin tones and textures, and supports professional multi-image fusion.
Realistic Rendering: Improved shadows, light falloff, material simulation, and text clarity, including dense typography in multiple languages.

Comparison with Other Models

vs Seedream 4.0: 4.5 offers stronger image and character consistency, enhanced text clarity, multi-image fusion with up to 14 inputs (versus fewer in 4.0), and faster generation speeds, providing more reliable high-resolution 4K outputs.

vs Midjourney v6: While Midjourney excels in artistic stylization, Seedream 4.5 offers superior control over text integration and subject consistency across batches. It’s better suited for commercial workflows requiring brand-safe, editable outputs.

vs DALL·E 3: DALL·E 3 leads in prompt understanding for abstract or conceptual tasks. Seedream 4.5, however, delivers higher native resolution and supports multi-reference image fusion.

Use cases

Commercial Design: Generates cinematic 4K visuals for e-commerce, ads, and layouts with precise brand consistency.
Creative Storytelling: Builds coherent image sets for concept art, world-building, and multi-frame narratives.
Professional Editing: Transforms existing photos with natural blends, ideal for marketing and product visualization.
Content Production: Speeds up workflows for social media, films, and publications requiring high-fidelity assets.

Seedream 4.5 benchmarks by Artificial Analysis

Human-preference results for Seedream 4.5 in text to image, next to models available on AI/ML API. Data retrieved Nov 3, 2026.

Text to image#28 / 981027Elo · ±12 at 95%AI/ML API price$0.04USD per generation

Text to image

Elo · text-to-image arena

AI/ML API price

USD per generation

Models on AI/ML API

Arena results for models you can call with the same API key.

Text to image

Blind pairwise human votes on images generated from text prompts. Seedream 4.5 ranks #28 of 98.

Seedream 4.5 API pricing

Seedream 4.5 pricing in US dollars
Usage	Price	Unit
Image generation	$0.04	per generation

Prices from the AI/ML API price list, checked on Nov 4, 2026.

Seedream 4.5 vs other image models: prices

AI/ML API rates for 5 models, per generation.

AI/ML API prices in USD per generation
Model	Per generation
Seedream 4.5	$0.04
Seedream 4.0 Image to Image	$0.03
Dreamina Creative Upscale	$0.031
Seedream 5.0 Lite Preview	$0.035
Seedream 5.0 Pro	$0.045

How to use the Seedream 4.5 API

View docs

Build with your agent

Give your agent the model details, code and documentation.

1Get your API key

Create API key

export AIMLAPI_KEY="8f2b4c7d9a1e6b3f…"

2Make your first request

curl '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 ginger cat asleep on a stack of exactly three hardcover books in a rainy bookshop window at dusk. Gold lettering on the glass reads OPEN LATE. Warm lamp light inside, raindrops and blurred neon reflections outside, 35mm film photo."
}'

import os
import requests

headers = {
    "Authorization": f"Bearer {os.environ['AIMLAPI_KEY']}",
    "Content-Type": "application/json",
}
payload = {
    "model": "bytedance/seedream-4-5",
    "prompt": "A ginger cat asleep on a stack of exactly three hardcover books in a rainy bookshop window at dusk. Gold lettering on the glass reads OPEN LATE. Warm lamp light inside, raindrops and blurred neon reflections outside, 35mm film photo."
}

response = requests.post("https://api.aimlapi.com/v1/images/generations", headers=headers, json=payload, timeout=120)
response.raise_for_status()
print(response.json())

const response = 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 ginger cat asleep on a stack of exactly three hardcover books in a rainy bookshop window at dusk. Gold lettering on the glass reads OPEN LATE. Warm lamp light inside, raindrops and blurred neon reflections outside, 35mm film photo."
  }),
});

if (!response.ok) throw new Error(`HTTP ${response.status}`);
console.log(await response.json());

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Seedream 4.5 FAQ

What inputs and outputs does Seedream 4.5 support?

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

How much does Seedream 4.5 cost?

Seedream 4.5 costs $0.04 per generation on AI/ML API, billed as you go with no subscription.

How is Seedream 4.5 billed?

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

Can Seedream 4.5 take an existing image as input?

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

Who created Seedream 4.5?

Seedream 4.5 was built by ByteDance.

How do I call Seedream 4.5 on AI/ML API?

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

Is Seedream 4.5 available through a single API key?

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

What is the Seedream 4.5 model ID?

Use bytedance/seedream-4-5 as the model parameter. Requests go to https://api.aimlapi.com/v1/images/generations with your AI/ML API key.

Start building with Seedream 4.5

Get API key

Seedream 4.5 API

bytedance/seedream-4-5

Build with your agent

Give your agent the model details, code and documentation.

1Get your API key

Create API key

export AIMLAPI_KEY="8f2b4c7d9a1e6b3f…"

2Make your first request

curl '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 ginger cat asleep on a stack of exactly three hardcover books in a rainy bookshop window at dusk. Gold lettering on the glass reads OPEN LATE. Warm lamp light inside, raindrops and blurred neon reflections outside, 35mm film photo."
}'

import os
import requests

headers = {
    "Authorization": f"Bearer {os.environ['AIMLAPI_KEY']}",
    "Content-Type": "application/json",
}
payload = {
    "model": "bytedance/seedream-4-5",
    "prompt": "A ginger cat asleep on a stack of exactly three hardcover books in a rainy bookshop window at dusk. Gold lettering on the glass reads OPEN LATE. Warm lamp light inside, raindrops and blurred neon reflections outside, 35mm film photo."
}

response = requests.post("https://api.aimlapi.com/v1/images/generations", headers=headers, json=payload, timeout=120)
response.raise_for_status()
print(response.json())

const response = 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 ginger cat asleep on a stack of exactly three hardcover books in a rainy bookshop window at dusk. Gold lettering on the glass reads OPEN LATE. Warm lamp light inside, raindrops and blurred neon reflections outside, 35mm film photo."
  }),
});

if (!response.ok) throw new Error(`HTTP ${response.status}`);
console.log(await response.json());

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Seedream 4.5 API

Seedream 4.5 overview

Seedream 4.5 by ByteDance

Seedream 4.5 specs

Seedream 4.5 API Overview

Technical Specifications

Performance Benchmarks

Key Features

Comparison with Other Models

Use cases

Seedream 4.5 benchmarks by Artificial Analysis

Text to image

AI/ML API price

Models on AI/ML API

Text to image

Seedream 4.5 API pricing

Seedream 4.5 vs other image models: prices

How to use the Seedream 4.5 API

Build with your agent

1Get your API key

2Make your first request

Related articles

Seedream 4.5 FAQ

Start building with Seedream 4.5

Seedream 4.5 API

Build with your agent

1Get your API key

2Make your first request

Seedream 4.5 API

Seedream 4.5 overview

Seedream 4.5 by ByteDance

Seedream 4.5 specs

Seedream 4.5 API Overview

Technical Specifications​

Performance Benchmarks

Key Features

Comparison with Other Models

Use cases

Text to image

AI/ML API price

Models on AI/ML API

Text to image

Seedream 4.5 API pricing

Seedream 4.5 vs other image models: prices

How to use the Seedream 4.5 API

Build with your agent

1Get your API key

2Make your first request

Models similar to Seedream 4.5

Seedream 5.0 Pro

Dreamina Creative Upscale

Seedream 5.0 Lite Preview

Flux pro 1.1

Flux.1 Kontext

Nano Banana Edit

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Seedream 4.5 FAQ

Start building with Seedream 4.5

Technical Specifications