Best Image Models for Chinese Users

Best Image Models for Chinese Users | Generated by AI

Home 2026.07

Question: OpenRouter image generation is returning 403 TOS violation. As a Chinese user, which image model should I use?

Answer:

Your 403 is probably not an image model quality issue. It is usually one of:

Provider restriction / geo policy
Model provider blocking certain regions
OpenRouter routing you to a provider that rejects the request
Prompt/content safety filter

OpenRouter exposes image models separately through its image generation API/model list. ([OpenRouter][1])

For a Chinese user, I would rank choices like this:

1. ByteDance Seedream ⭐⭐⭐⭐⭐ (best China-friendly choice)

ByteDance Seedream is probably the first one I would try.

Why:

Chinese prompt understanding is naturally strong
Good for:
- posters
- product images
- UI mockups
- Chinese text
- marketing material
Lower chance of China-region friction

OpenRouter currently lists bytedance-seed/seedream-4.5 as an image output model. ([OpenRouter][1])

Example:

model="bytedance-seed/seedream-4.5"

prompt="""
生成一张科技公司官网首页英雄图：
未来感 AI 实验室，
蓝紫色光线，
中文标题“智能未来”
4K，高质量商业摄影风格
"""

2. Google Nano Banana / Gemini Image ⭐⭐⭐⭐

Google image models are very strong for reasoning + editing.

Good at:

edit existing images
keep character consistency
multimodal workflow

OpenRouter lists Nano Banana 2 (Gemini 3.1 Flash Image) among image-capable models. ([OpenRouter][2])

However:

For mainland China users:

Google API availability can be annoying
provider routing may fail
VPN/IP/account region can matter

I would not make this your only production dependency.

3. Qwen Image / Alibaba ecosystem ⭐⭐⭐⭐

Alibaba Cloud is interesting for Chinese users.

Advantages:

Chinese text generation
Chinese culture/style
easier local ecosystem

If you are already using Qwen models, this fits your stack.

4. FLUX ⭐⭐⭐⭐

Black Forest Labs FLUX models:

Excellent for:

photorealism
art
advertisements
cinematic images

Weakness:

Chinese text rendering
Chinese cultural context

Good general-purpose model.

My practical recommendation for you:

Use case	Model
Chinese posters / WeChat / marketing	Seedream 4.5
AI product screenshots	Seedream + Gemini Image
Realistic photos	FLUX
Image editing	Gemini Image
Open-source/local experiment	Qwen Image / FLUX

For your situation (AI engineer + building products), I would not spend time fighting OpenRouter routing.

Try:

Production API

China users:
    Seedream

Global users:
    Gemini Image / FLUX

Local GPU

Your RTX 4070:

FLUX.1-schnell: possible
SDXL: easy
Qwen Image: probably too heavy unless quantized

Also check your OpenRouter request format. Image generation is not identical to normal chat completion. OpenRouter has a dedicated image generation endpoint/model capability. ([OpenRouter][3])

A common mistake:

{
 "model":"xxx",
 "messages":[...]
}

instead of using the image generation API flow.

My first test order:

bytedance-seed/seedream-4.5
google/gemini-3.1-flash-image / Nano Banana 2
black-forest-labs/flux
Qwen image models

For a mainland Chinese developer, Seedream is probably the least painful choice today. ([OpenRouter][1])

References:

OpenRouter image generation docs ([OpenRouter][3])
OpenRouter image models list ([OpenRouter][1])
OpenRouter model catalog ([OpenRouter][2])

[1]: https://openrouter.ai/docs/api/api-reference/images/list-image-models?utm_source=chatgpt.com “List image generation models	OpenRouter	Documentation”
[2]: https://openrouter.ai/models?fmt=cards&output_modalities=text&utm_source=chatgpt.com “Models	OpenRouter”
[3]: https://openrouter.ai/docs/guides/overview/multimodal/image-generation?utm_source=chatgpt.com “OpenRouter Image Generation	Complete Documentation	OpenRouter	Documentation”

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