Hunyuan Video 1.5 — #1 Open-Source, Uncensored Model

Q: What is HunyuanVideo 1.5 and how does it compare to other text-to-video AI models?

HunyuanVideo 1.5 is an 8.3B-parameter video diffusion model developed by Tencent. It produces high-quality text-to-video and image-to-video results comparable to larger models, while running efficiently on consumer GPUs.

Q: How can I install and run HunyuanVideo 1.5 on ComfyUI using a consumer GPU?

You can install HunyuanVideo 1.5 by placing its model files in the correct ComfyUI folders and using the official T2V or I2V workflow templates. It runs on 8GB–24GB GPUs, with the Nightly version of ComfyUI recommended for full compatibility.

Q: What are the differences between the (cosy) HunyuanVideo 1.5 variants, including GGUF and 5G builds?

Cosy variants include GGUF builds for 8–12GB GPUs, a 5G build for 5GB VRAM systems, and a full version for 16–24GB GPUs. These variants use quantization to expand hardware compatibility without altering the original model weights.

Q: Is HunyuanVideo 1.5 uncensored, and what do the community builds remove or change?

Official releases include safety filters, but cosy community builds remove NSFW blocking, prompt restrictions, and safety classifiers. The base model weights remain unchanged, allowing unrestricted prompts.

Q: What hardware do I need to generate videos with HunyuanVideo 1.5 on a low-VRAM GPU?

Low-VRAM GPUs such as 6GB or 8GB models can run HunyuanVideo 1.5 using GGUF or 5G cosy builds. For the highest quality and full precision, 16–24GB GPUs like the RTX 3090, 4080, or 4090 are recommended.

Hunyuan Video 1.5 is one of the best open-source video generation models

Hunyuan Video 1.5 is Tencent’s breakthrough 8.3B-parameter video generation model, engineered to deliver high-quality text-to-video and image-to-video results—while running on consumer-grade GPUs.

Its open-source availability has also enabled a number of community variants, such as the (cosy) Hunyuan 1.5 family, including GGUF builds that run on as little as 8GB VRAM, and 5G-optimized configurations for extremely fast inference.

Feature	Description
8.3B Parameters	Compact compared to 12–40B video models, yet delivers flagship-level quality
720p Native Output	Generates 5–10 second clips with 1080p super-resolution upscaling
Text-to-Video (T2V)	Produces cinematic sequences from natural language prompts
Image-to-Video (I2V)	Animates still images with motion, physics, and camera control
Multilingual Text Rendering	Supports both Chinese and English inside scenes
High Prompt Accuracy	Excellent with camera paths, physics, emotions, pacing
Open Source	Free, modifiable, and supported by an active community

Hunyuan Video 1.5 Cosyflow Variants Explained

The community-led cosy releases repackage Hunyuan Video 1.5 for a variety of hardware and use-cases. These versions are not official Tencent builds—they are community conveniences.

(cosy) Hunyuan 1.5 Text to Video

Default community build.
Best quality, full precision for the 8.3B model.
Recommended for 16–24GB VRAM GPUs.
Same behavior & output quality as the full reference implementation.

(cosy) Hunyuan 1.5 Text to Video (GGUF)

GGUF quantized version (similar to LLM quantization formats).
Much smaller RAM / VRAM footprint.
Ideal for users with 8–12GB VRAM GPUs.
Slight quality reduction, but considerably faster and lighter.

(cosy) Hunyuan 1.5 Text to Video (8GB VRAM GGUF version)

Specifically optimized for 8GB NVIDIA GPUs (e.g., RTX 3070, 4060).
Uses aggressive quantization.
Trade-offs:
- Lower motion fidelity
- Some artifacts in high-speed camera movement
- Slightly softer visuals

Still remarkably good for its hardware requirements.

(cosy) Hunyuan 1.5 Text to Video (5G)

“5G” stands for 5 gigabytes VRAM target.
Ultra-light, aggressively optimized.
Useful for:
- Notebook GPUs
- Cloud free-tier instances
- Small form factor mini-PCs
Quality loss is noticeable, but still functional for concept previews or rapid iteration.

Why People Call These Hunyuan Video “Uncensored”

Tencent’s official release is governed by standard content restrictions (similar to Stable Diffusion 1.5 and 3.0). The workflow builds remove restrictive filters, enabling usage without content-blocking:

No safety classifier checkpoints
No NSFW auto-masking
No prompt sanitization

⚠️ This does not alter the underlying model weights. The model has not been trained on explicit content, but now accepts any prompts without blocking.

Hunyuan Video 1.5 uses an optimized multi-stage diffusion pipeline:

Model links

text_encoders

diffusion_models

vae

hunyuanvideo15_vae_fp16.safetensors

Workflow Templates

Text-to-Video: video_hunyuan_video_1.5_720p_t2v.json
Image-to-Video: video_hunyuan_video_1.5_720p_i2v.json

If ComfyUI cannot find the nodes:

Update to Nightly
Ensure no extension import failed at startup
Make sure the template exists in your version

HunyuanVideo 1.5 is currently one of the most accessible, high-quality, and open-source video models available—while its community “cosy” variants unlock uncensored usage and low-VRAM deployments.

Limitations to Expect

Although powerful, HunyuanVideo 1.5 does have a few constraints:

Videos longer than 10 seconds lose quality
Fast motion may cause temporal jitter
Fine detail can “melt” across frames
GGUF versions reduce fidelity slightly
Complex object interactions aren’t perfect

GPU	VRAM	Expected Performance
RTX 4090	24GB	Full precision, fastest generation
RTX 3090 / 4080	16–24GB	Produces full-quality results

Minimum (GGUF builds)

GPU	VRAM	Notes
RTX 4060 / 3070	8GB	Works with GGUF 8GB version
Laptop GPUs	6GB	5G build only

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Frequently Asked Questions

What is HunyuanVideo 1.5 and how does it compare to other text-to-video AI models?

HunyuanVideo 1.5 is Tencent’s 8.3B-parameter open-source video diffusion model built for text-to-video and image-to-video generation. Compared to larger models (12–40B), it delivers similar cinematic output while running efficiently on consumer GPUs, making it one of the most accessible high-quality T2V models available.

How can I install and run HunyuanVideo 1.5 on ComfyUI using a consumer GPU?

HunyuanVideo 1.5 can be installed by placing its text encoders, diffusion models, and VAE files in the ComfyUI models/ directory. Using the provided workflow templates (T2V or I2V), creators can generate 720p or 1080p videos on GPUs ranging from 8GB to 24GB VRAM. Updating ComfyUI to the Nightly build ensures full compatibility.

What are the differences between the (cosy) HunyuanVideo 1.5 variants, including GGUF and 5G builds?

The cosy variants offer different performance levels: GGUF builds run on 8–12GB VRAM using quantization, the 5G version runs on as little as 5GB VRAM for laptops and cloud free tiers, and the full model provides maximum fidelity for 16–24GB GPUs. These community versions expand compatibility without changing the core model.

Is HunyuanVideo 1.5 uncensored, and what do the community builds remove or change?

While Tencent’s official release includes content restrictions such as safety filters, cosy community builds remove prompt blocking, NSFW filters, and safety classifiers. The core model weights remain unchanged—meaning the model isn’t trained on explicit content, but it no longer blocks prompts.

What hardware do I need to generate videos with HunyuanVideo 1.5 on a low-VRAM GPU?

HunyuanVideo 1.5 can run on GPUs with as little as 6–8GB VRAM using the GGUF or 5G cosy builds. For best quality, GPUs with 16–24GB VRAM such as the RTX 3090, 4080, or 4090 are recommended. These variants make T2V generation accessible on laptops and budget systems.

Written by:

Eden

A trained artist who once feared AI art might end her career, Eden has since embraced it as a powerful ally. Now, she confidently creates with AI.

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