🐱 Sana Model Card
Model
We introduce SANA-1.5，an efficient model with scaling of training-time and inference time techniques. SANA-1.5 delivers: efficient model growth from 1.6B Sana-1.0 model to 4.8B, achieving similar or better performance than training from scratch and saving 60% training cost; efficient model depth pruning, slimming any model size as you want; powerful VLM selection based inference scaling, smaller model+inference scaling > larger model; Top-notch GenEval & DPGBench results. Detailed results are shown in the below table.
Source code is available at https://github.com/NVlabs/Sana.
Model Description
- Developed by: NVIDIA, Sana
- Model type: Scalable Linear-Diffusion-Transformer-based text-to-image generative model
- Model size: 1.6B parameters
- Model precision: torch.bfloat16 (BF16)
- Model resolution: This model is developed to generate 1024px based images with multi-scale heigh and width.
- License: Apache License 2.0. Additional Information: Gemma Terms of Use | Google AI for Developers for Gemma-2-2B-IT, Gemma Prohibited Use Policy | Google AI for Developers.
- Model Description: This is a model that can be used to generate and modify images based on text prompts. It is a Linear Diffusion Transformer that uses one fixed, pretrained text encoders (Gemma2-2B-IT) and one 32x spatial-compressed latent feature encoder (DC-AE).
- Resources for more information: Check out our GitHub Repository and the SANA-1.5 report on arXiv.
Model Sources
For research purposes, we recommend our generative-models Github repository (https://github.com/NVlabs/Sana),
which is more suitable for both training and inference and for which most advanced diffusion sampler like Flow-DPM-Solver is integrated.
MIT Han-Lab provides free Sana inference.
- Repository: ttps://github.com/NVlabs/Sana
- Demo: https://nv-sana.mit.edu/
🧨 Diffusers
Under construction PR
import torch
from diffusers import SanaPipeline
pipe = SanaPipeline.from_pretrained(
"Efficient-Large-Model/SANA1.5_1.6B_1024px_diffusers",
torch_dtype=torch.bfloat16,
)
pipe.to("cuda")
pipe.text_encoder.to(torch.bfloat16)
# pipe.enable_model_cpu_offload()
prompt = 'Self-portrait oil painting, a beautiful cyborg with golden hair, 8k'
image = pipe(
prompt=prompt,
height=1024,
width=1024,
guidance_scale=4.5,
num_inference_steps=20,
)[0]
image[0].save(f"sana1.5.png")
Uses
Direct Use
The model is intended for research purposes only. Possible research areas and tasks include
-
Generation of artworks and use in design and other artistic processes.
-
Applications in educational or creative tools.
-
Research on generative models.
-
Safe deployment of models which have the potential to generate harmful content.
-
Probing and understanding the limitations and biases of generative models.
Excluded uses are described below.
Out-of-Scope Use
The model was not trained to be factual or true representations of people or events, and therefore using the model to generate such content is out-of-scope for the abilities of this model.
Limitations and Bias
Limitations
- The model does not achieve perfect photorealism
- The model cannot render complex legible text
- fingers, .etc in general may not be generated properly.
- The autoencoding part of the model is lossy.
Bias
While the capabilities of image generation models are impressive, they can also reinforce or exacerbate social biases.