AI image model comparison

Hy Image 3.5 Preview vs Seedream 4.5

Image quality, cost per image, and editing features compared side by side. Or skip the guesswork and generate with both.

Hy Image 3.5 Preview is a unified image generation and editing model from Tencent.

Per image
Not available
Output / 1M
$1.60
Image Elo
Not available

Seedream 4.5 is the latest in-house image generation model developed by ByteDance.

Per image
$0.04
Output / 1M
$9.58
Image Elo
Not available

Comparing chat or coding models? Compare text models

At a glance

Quick verdict

Which model wins on the things that matter most when you're making images.

Cheaper per image

Not available

Only one lists a per-image price

Better image quality

Not available

Not enough arena data

Better at editing

Not available

Not enough arena data

Newer release

tencent logo

Hy Image 3.5 Preview

Released October 5, 2026

Pricing

Hy Image 3.5 Preview vs Seedream 4.5 price per image

What each image actually costs, plus the underlying API rates. Cheaper option highlighted.

Metrictencent logoHy Image 3.5 Previewbytedance-seed logoSeedream 4.5
Cost per imageEstimated, ~1 megapixel (1024×1024)Not available$0.04
Image outputPer 1M image tokens$1.60$9.58
Tokens per imageHow many image tokens one ~1MP image usesNot available4,175
Prompt textPer 1M input tokensIncludedIncluded

What it costs in practice

Estimated totals at standard resolution.

Single image

1 image

tencent logoHy Image 3.5 PreviewNot available
bytedance-seed logoSeedream 4.5$0.04

Social media batch

50 images

tencent logoHy Image 3.5 PreviewNot available
bytedance-seed logoSeedream 4.5$2

Product catalog

1,000 images

tencent logoHy Image 3.5 PreviewNot available
bytedance-seed logoSeedream 4.5$40

Specs

Inputs, outputs, and limits

What each model accepts, what it gives back, and how long your prompt can be.

Metrictencent logoHy Image 3.5 Previewbytedance-seed logoSeedream 4.5
AcceptsImage, TextImage, Text
ProducesImageImage
Max prompt lengthText plus reference images100K tokens4K tokens
Reasoning stepNoNo
Release dateOctober 5, 2026December 23, 2025

Features

Supported features

Creative controls available for each model.

Metrictencent logoHy Image 3.5 Previewbytedance-seed logoSeedream 4.5
Image editingAccepts reference or source imagesSupportedSupported
Text alongside imagesCan explain or caption what it madeNot supportedNot supported
Thinks before drawingPlans the image with a reasoning stepNot supportedNot supported
Reproducible seedsSame seed, same imageNot supportedNot supported
Temperature controlTrade consistency for varietyNot supportedSupported

FAQ

Frequently asked questions

Can Hy Image 3.5 Preview and Seedream 4.5 edit existing images?

Yes. Both accept reference images, so you can upload a photo and ask for changes like a new background, different lighting, or added text.

Can I use Hy Image 3.5 Preview and Seedream 4.5 at the same time?

Yes. Shortcut Chat sends one prompt to multiple image models at once, so you can see Hy Image 3.5 Preview and Seedream 4.5 results side by side and keep the one you like.

tencent logobytedance-seed logo

Why choose? Generate with both.

Send one prompt to Hy Image 3.5 Preview and Seedream 4.5 at the same time. See both images side by side and keep the one you like.