BytedanceReleased on Dec 1, 2025

Seedream 4.5: Benchmarks, Pricing & Context Window

Seedream 4.5 is a image generation model from Bytedance, released in December 2025.

Upgraded Bytedance image model with stronger spatial understanding and world knowledge. Supports 4K resolution, image-to-image editing, and various aspect ratios.

Input
TextImage
Output
Image

Seedream 4.5 examples

Recent arena outputs from Seedream 4.5, picked from the highest-ranked matchups.

Seedream 4.5 API

POST/v1/generations

Set for image-to-image / editing models.

Run a request to see the response

Use it in your code

OpenAI-compatible endpoint through the LLM Stats gateway.

import requests

# Create the generation. wait="auto" long-polls (up to 60s) so most short
# jobs return as "completed" in a single round-trip.
res = requests.post(
    "https://gateway.llm-stats.com/v1/generations",
    headers={"Authorization": "Bearer YOUR_API_KEY"},
    json={
        "model": "seedream-4.5",
        "input": {"prompt": "A beautiful sunset over mountains"},
        "wait": "auto",
    },
)
job = res.json()

# If it didn't finish inside the wait window, poll the same resource.
while job["status"] in ("queued", "running"):
    res = requests.get(
        f"https://gateway.llm-stats.com/v1/generations/{job['id']}",
        params={"wait": 60},
        headers={"Authorization": "Bearer YOUR_API_KEY"},
    )
    job = res.json()

if job["status"] == "completed":
    print("image:", job["output"]["media"][0]["url"])
else:
    print("Failed:", job["error"]["message"])

Need an API key? Create one above in the playground, or read the API documentation.

Seedream 4.5 pricing

Providers

Seedream 4.5 starts at $0.0400 per generated image via Fal. See all 2 providers below with their per-image pricing, latency, and modality support.

ProviderPrice $/imageLatency sInputOutput
Fal logoFal
$0.0400
Replicate logoReplicate
$0.0400

Seedream 4.5 benchmarks

Image Arena Performance

Performance by category and language

Where Seedream 4.5 is strongest across prompt themes and languages. Conservative TrueSkill score (μ − 3σ), only axes with 3+ votes.

Leaderboard Rankings

Quality Tracker

Similar Models

How Seedream 4.5 compares to its closest neighbors on each image arena it competes in.

Notice missing or incorrect data?

Community Benchmarks

How Seedream 4.5 ranks in community-created evaluations.

Seedream 4.5 license

Seedream 4.5 is released under the Proprietary license, which restricts commercial use.

License
Proprietary
Non-commercial

Proprietary license - usage restrictions apply

Models like Seedream 4.5

Other image models ranked closest to Seedream 4.5.

FAQ

Common questions about Seedream 4.5.

Who created Seedream 4.5?

Seedream 4.5 was created by Bytedance.

What is the license for Seedream 4.5?

Seedream 4.5 is released under the Proprietary license.

Is Seedream 4.5 multimodal?

Yes, Seedream 4.5 is a multimodal model that can process both text and images as input.