What Is Hunyuan Image 2.1?
Hunyuan Image 2.1 exposes a traditional configurable diffusion workflow: steps, guidance, negative prompt, seed and prompt enhancement. It is useful for reproducible experiments and teams that prefer explicit sampling controls over a mostly automatic image API.
Hunyuan Image Model Versions
Hunyuan Image 2.1
Steps + guidance · 1K
From 15 Credits
Hunyuan Image 3 Instruct
Tencent’s instruction-focused image model for detailed prompts and deliberate composition.
- Resolutions: 1K
- Reference images: not supported
- Modes: Text to Image
- Speed: Slow
Hunyuan Image 3.0
Tencent’s native multimodal base generator for complex scenes and high prompt alignment.
- Resolutions: 1K / 2K
- Reference images: not supported
- Modes: Text to Image
- Speed: Slow
Hunyuan Image 2.1
A configurable Hunyuan generation for users who want direct sampling and negative-prompt controls.
- Resolutions: 1K
- Reference images: not supported
- Modes: Text to Image
- Speed: Slow
What Is Hunyuan Image 2.1 Best For?
- Controlled diffusion experiments
- Negative-prompt workflows
- Reproducible seed comparisons
- Illustrative scenes
How to Use Hunyuan Image 2.1
- Start with the 28-step default.
- Add a short negative prompt only when needed.
- Fix the seed before tuning Guidance.
- Compare against Hunyuan Image 3 for final selection.
Hunyuan Image 2.1 Settings Explained
Steps
The documented default is 28; extra steps cost time and rarely rescue a weak prompt.
Negative Prompt
Names unwanted defects such as blur, watermarks or malformed detail.
The panel above shows only the parameters Hunyuan Image 2.1 actually supports. Switch versions and unsupported controls disappear rather than sitting there doing nothing.
Hunyuan Image 2.1 Prompt Examples
Character illustration
Anthropomorphic penguin plush in a painting studio, red knitted scarf and beret, soft window light, tactile fabric detail
Environment study
Ancient observatory above a cloud layer, brass instruments, pale dawn, painterly realism, calm blue palette
Hunyuan Image 2.1 Test Results
Testing in progress
Every model runs the same eight-category prompt set — portrait, product, poster text, anime character, interior, multi-reference, image editing and character consistency — recording generation time, success rate, text accuracy and identity retention. That run has not finished for Hunyuan Image 2.1, so this page shows no scores. We do not publish numbers we have not measured.
Hunyuan Image 2.1 Limitations
- Older than Hunyuan Image 3
- Text-to-image only
- High per-megapixel cost
Hunyuan Image 2.1 Pricing and Credits
Credits scale with resolution and image count. The Generate button always shows what this run costs.
1K
15 credits / image
Failed generations cost 0 credits.
Commercial Use and Image Rights
Commercial use is governed by Tencent’s Hunyuan licence and the selected service terms.
- Model used: Hunyuan Image 2.1
- Model developer: Tencent
- The inference route is managed internally and may change without changing the selected model
- Uploads are sent only to the configured inference service needed to complete the generation
- You can delete any generation from your history at any time
Frequently Asked Questions
Why keep 2.1 when Image 3 exists?+
It exposes direct steps and negative-prompt controls that the Instruct generation route does not.
What Guidance should I start with?+
Use the documented 3.5 default, then change one setting at a time with a fixed seed.
Release History and Sources
September 8, 2025 · Weights and model code released
This date applies to the event shown. Later API access, weights and availability on All Image AI may have different dates.
Explore this event on the image model timeline →
Related Models and Tools
AI Image Generator
Create an image, try a new look or transform a photo. Start with the result you want.
Poster Generator
Posters with headlines that come out right the first time.
Qwen Image 3 Pro
Alibaba
The higher-fidelity Qwen Image 3 tier for polished text, editing and final assets.
Qwen Image 3
Alibaba
A fast, economical Qwen generation for ideation, localisation and everyday image work.
Qwen Image Max
Alibaba
A high-fidelity Qwen tier for natural-looking scenes, bilingual prompts and controlled edits.
Qwen Image 2512
Alibaba
Alibaba’s upgraded Qwen Image checkpoint for more realistic people, richer texture and bilingual prompts.