Model Gallery

Artifex provides implementations of state-of-the-art generative models with 2025 research compliance, including Diffusion Transformers (DiT), SE(3) equivariant flows for molecular generation, and advanced MCMC sampling with BlackJAX integration.

• 7 Model Families

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  VAE, GAN, Diffusion, Flow, EBM, Autoregressive, and Geometric models with 67+ implementations

• 2025 Research Compliance

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  Latest architectures including DiT, StyleGAN3, SE(3) molecular flows, and score-based diffusion

• Production Ready

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  Hardware-optimized, fully tested, type-safe implementations built on JAX/Flax NNX

• Multi-Modal

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  Native support for images, text, audio, proteins, molecules, and 3D geometric data

Overview

All models in Artifex follow a unified interface and are built on JAX/Flax NNX for:

• Hardware acceleration: Automatic GPU/TPU support with XLA optimization
• Type safety: Full type annotations and protocol-based interfaces
• Composability: Mix and match components across model types
• Reproducibility: Deterministic RNG handling and comprehensive testing
• Scalability: Distributed training with data, model, and pipeline parallelism

Model Families

VAE Variational Autoencoders

Latent variable models with probabilistic encoding for representation learning and generation.

Available Models:

Model	Description	Key Features	Use Cases
VAE	Standard Variational Autoencoder	Gaussian latents, KL regularization	Representation learning, compression
β-VAE	Disentangled VAE	Controllable β parameter, beta annealing	Disentangled representations
β-VAE with Capacity	β-VAE with capacity control	Gradual capacity increase, controlled disentanglement	Balance reconstruction and disentanglement
Conditional VAE	Class-conditional VAE	Label conditioning, controlled generation	Supervised generation
VQ-VAE	Vector Quantized VAE	Discrete latent codes, codebook learning	Discrete representations, compression

Quick Start:

from artifex.generative_models.models.vae import VAE
from artifex.generative_models.core.configuration import VAEConfig, EncoderConfig, DecoderConfig
from flax import nnx

encoder = EncoderConfig(name="encoder", input_shape=(32, 32, 3), latent_dim=128, hidden_dims=(64, 128, 256), activation="relu")
decoder = DecoderConfig(name="decoder", latent_dim=128, output_shape=(32, 32, 3), hidden_dims=(256, 128, 64), activation="relu")
config = VAEConfig(name="vae", encoder=encoder, decoder=decoder, encoder_type="cnn", kl_weight=1.0)

model = VAE(config, rngs=nnx.Rngs(0))

Documentation:

• VAE User Guide - Complete guide with examples
• VAE API Reference - Detailed API documentation

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GAN Generative Adversarial Networks

Adversarial training for high-quality image generation and image-to-image translation.

Available Models:

Model	Description	Key Features	Use Cases
DCGAN	Deep Convolutional GAN	Convolutional architecture, stable training	Image generation baseline
WGAN	Wasserstein GAN	Wasserstein distance, critic training	Stable training, mode coverage
LSGAN	Least Squares GAN	Least squares loss, improved stability	Image generation with stable training
StyleGAN	Style-based GAN	Style mixing, AdaIN layers	High-quality face generation
StyleGAN3	Alias-free StyleGAN	Translation/rotation equivariance	Alias-free high-quality generation
CycleGAN	Cycle-consistent GAN	Unpaired translation, cycle loss	Image-to-image translation
PatchGAN	Patch-based discriminator	Local image patches, texture detail	Image-to-image tasks, super-resolution
Conditional GAN	Class-conditional GAN	Label conditioning	Controlled generation

Quick Start:

from artifex.generative_models.models.gan import DCGAN
from artifex.generative_models.core.configuration import DCGANConfig, GeneratorConfig, DiscriminatorConfig
from flax import nnx

generator = GeneratorConfig(name="generator", latent_dim=100, features=(512, 256, 128, 64))
discriminator = DiscriminatorConfig(name="discriminator", features=(64, 128, 256, 512))
config = DCGANConfig(name="dcgan", image_shape=(3, 64, 64), generator=generator, discriminator=discriminator)

model = DCGAN(config, rngs=nnx.Rngs(0))

Documentation:

• GAN User Guide - Complete guide with training tips
• GAN API Reference - Detailed API documentation

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Diffusion Diffusion Models

State-of-the-art denoising diffusion models for high-quality generation.

Available Models:

Model	Description	Key Features	Use Cases
DDPM	Denoising Diffusion Probabilistic Models	Gaussian diffusion, noise prediction	Image generation, baseline
DDIM	Denoising Diffusion Implicit Models	Deterministic sampling, faster inference	Fast high-quality generation
Score-based	Score-based generative models	Score matching, SDE/ODE solvers	Flexible sampling strategies
Latent Diffusion	Latent space diffusion	VAE encoder/decoder, efficient training	High-resolution generation
DiT	Diffusion Transformer	Transformer backbone, scalable	Large-scale image generation
Stable Diffusion	Text-to-image diffusion	CLIP conditioning, latent diffusion	Text-to-image generation

Quick Start:

from artifex.generative_models.models.diffusion import DDPMModel
from artifex.generative_models.core.configuration import DDPMConfig, UNetBackboneConfig, NoiseScheduleConfig
from flax import nnx

backbone = UNetBackboneConfig(name="backbone", in_channels=3, out_channels=3, base_channels=128, channel_mults=(1, 2, 4))
noise_schedule = NoiseScheduleConfig(name="schedule", schedule_type="linear", num_timesteps=1000, beta_start=1e-4, beta_end=2e-2)
config = DDPMConfig(name="ddpm", input_shape=(3, 32, 32), backbone=backbone, noise_schedule=noise_schedule)

model = DDPMModel(config, rngs=nnx.Rngs(0))

Documentation:

• Diffusion User Guide - Complete guide with sampling methods
• Diffusion API Reference - Detailed API documentation
• DiT Architecture - Diffusion Transformer details

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Flow Normalizing Flows

Invertible transformations with tractable likelihoods for exact density estimation.

Available Models:

Model	Description	Key Features	Use Cases
RealNVP	Real-valued Non-Volume Preserving	Affine coupling layers, multi-scale	Density estimation baseline
Glow	Generative Flow	Invertible 1x1 convolutions, ActNorm	High-quality image generation
MAF	Masked Autoregressive Flow	Autoregressive coupling, parallel training	Flexible density estimation
IAF	Inverse Autoregressive Flow	Fast sampling, parallel generation	Variational inference
Neural Spline Flow	Spline-based coupling	Smooth transformations, expressive	High-quality density estimation
SE(3) Molecular Flow	Equivariant molecular flows	SE(3) symmetry, molecular generation	Drug design, molecular modeling
Conditional Flow	Class-conditional flows	Label conditioning	Controlled generation

Quick Start:

from artifex.generative_models.models.flow import NormalizingFlow
from artifex.generative_models.core.configuration import FlowConfig
from flax import nnx

config = FlowConfig(name="realnvp", input_shape=(32, 32, 3), num_flows=8, coupling_type="affine")

model = NormalizingFlow(config, rngs=nnx.Rngs(0))

Documentation:

• Flow User Guide - Complete guide with coupling layers
• Flow API Reference - Detailed API documentation
• SE(3) Molecular Flows - Equivariant flows for molecules

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EBM Energy-Based Models

Energy function learning with MCMC sampling for compositional generation.

Available Models:

Model	Description	Key Features	Use Cases
EBM	Energy-based model	Energy function learning, flexible	Compositional generation
EBM with MCMC	EBM with MCMC sampling	Langevin dynamics, HMC, NUTS	High-quality sampling
Persistent CD	Persistent Contrastive Divergence	Persistent chains, efficient training	Stable EBM training

MCMC Samplers (via BlackJAX integration):

• HMC: Hamiltonian Monte Carlo
• NUTS: No-U-Turn Sampler (adaptive HMC)
• MALA: Metropolis-Adjusted Langevin Algorithm
• Langevin Dynamics: First-order gradient-based sampling

Quick Start:

from artifex.generative_models.models.energy import EBM
from artifex.generative_models.core.configuration import EBMConfig, EnergyNetworkConfig, MCMCConfig
from flax import nnx

energy_network = EnergyNetworkConfig(name="energy_net", hidden_dims=(512, 256, 128), activation="swish")
mcmc = MCMCConfig(name="mcmc", n_steps=100, step_size=0.01)
config = EBMConfig(name="ebm", input_dim=784, energy_network=energy_network, mcmc=mcmc)

model = EBM(config, rngs=nnx.Rngs(0))

Documentation:

• EBM Guide - Energy-based model details
• MCMC Sampling - Sampling algorithms

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AR Autoregressive Models

Sequential generation with explicit likelihood for ordered data.

Available Models:

Model	Description	Key Features	Use Cases
PixelCNN	Autoregressive image model	Masked convolutions, pixel-by-pixel	Image generation with likelihood
WaveNet	Autoregressive audio model	Dilated convolutions, long context	Audio generation, TTS
Transformer	Transformer-based AR	Self-attention, parallel training	Text, structured sequences

Quick Start:

from artifex.generative_models.models.autoregressive import PixelCNN
from artifex.generative_models.core.configuration import PixelCNNConfig
from flax import nnx

config = PixelCNNConfig(
    name="pixelcnn",
    image_shape=(32, 32, 3),
    num_layers=8,
    hidden_channels=128,
    kernel_size=3,
    num_classes=256
)

model = PixelCNN(config, rngs=nnx.Rngs(0))

Documentation:

• PixelCNN API - Image autoregressive models
• WaveNet API - Audio autoregressive models
• Transformer API - Transformer-based models

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Geometric Geometric Models

3D structure generation with physical constraints and equivariance.

Available Models:

Model	Description	Key Features	Use Cases
Point Cloud Generator	3D point cloud generation	Permutation invariance	3D object generation
Mesh Generator	3D mesh generation	Vertex/face generation, deformation	3D modeling
Protein Graph	Protein structure generation	Residue graphs, amino acid features	Protein design
Protein Point Cloud	Protein backbone generation	Cα coordinates, backbone geometry	Protein structure prediction
Voxel Generator	Voxel-based 3D generation	Regular 3D grid	3D shape generation
Graph Generator	Graph-based generation	Node/edge features, message passing	Molecular graphs

Quick Start:

from artifex.generative_models.models.geometric import PointCloudModel
from artifex.generative_models.core.configuration import PointCloudConfig, PointCloudNetworkConfig
from flax import nnx

network = PointCloudNetworkConfig(name="network", embed_dim=256, num_heads=8, num_layers=6)
config = PointCloudConfig(name="point_cloud", num_points=128, point_dim=3, network=network)

model = PointCloudModel(config, rngs=nnx.Rngs(0))

Documentation:

• Protein Models - Protein structure generation
• Point Cloud Models - 3D point cloud generation
• Graph Models - Graph-based generation

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Model Comparison

Choose the right model for your task:

Model Type	Sample Quality	Training Stability	Speed	Exact Likelihood	Best For
VAE	⭐⭐⭐	⭐⭐⭐⭐⭐	⭐⭐⭐⭐⭐	❌ (Lower bound)	Representation learning, fast sampling
GAN	⭐⭐⭐⭐⭐	⭐⭐	⭐⭐⭐⭐	❌	High-quality images, style transfer
Diffusion	⭐⭐⭐⭐⭐	⭐⭐⭐⭐⭐	⭐⭐	❌	State-of-the-art generation, controllability
Flow	⭐⭐⭐⭐	⭐⭐⭐⭐	⭐⭐⭐	✅	Density estimation, exact inference
EBM	⭐⭐⭐⭐	⭐⭐⭐	⭐⭐	❌ (unnormalized)	Compositional generation, flexibility
AR	⭐⭐⭐⭐	⭐⭐⭐⭐	⭐⭐	✅	Sequences, explicit probabilities
Geometric	⭐⭐⭐⭐	⭐⭐⭐⭐	⭐⭐⭐	Varies	3D structures, physical constraints

Common Backbones

Artifex provides reusable backbone architectures used across model types:

U-Net

Widely used in diffusion models and image-to-image tasks:

from artifex.generative_models.models.common.unet import UNet

unet = UNet(
    in_channels=3,
    out_channels=3,
    channels=[128, 256, 512, 1024],
    num_res_blocks=2,
    attention_resolutions=[16, 8],
    rngs=nnx.Rngs(0)
)

Documentation: U-Net API

Diffusion Transformer (DiT)

Transformer-based backbone for diffusion models:

from artifex.generative_models.models.diffusion.dit import DiT

dit = DiT(
    input_size=32,
    patch_size=2,
    in_channels=3,
    hidden_size=768,
    depth=12,
    num_heads=12,
    rngs=nnx.Rngs(0)
)

Documentation: DiT API

Encoders & Decoders

Modular encoder/decoder architectures:

• MLP Encoder/Decoder: Fully-connected networks
• CNN Encoder/Decoder: Convolutional networks for images
• Conditional Encoder/Decoder: Class-conditional variants
• ResNet Encoder/Decoder: Residual connections

Documentation: Encoders | Decoders

Conditioning Methods

Artifex supports multiple conditioning strategies across models:

Method	Description	Supported Models	Use Cases
Class Conditioning	One-hot encoded labels	VAE, GAN, Diffusion, Flow	Supervised generation
Text Conditioning	CLIP embeddings	Diffusion, GAN	Text-to-image
Image Conditioning	Concatenation, cross-attention	GAN, Diffusion	Image-to-image, inpainting
Embedding Conditioning	Learned embeddings	All models	Flexible conditioning

Documentation: Conditioning Guide

Model Registry

All models are registered in a global registry for easy instantiation:

from artifex.generative_models.models.registry import (
    list_models,
    get_model_class,
    register_model
)

# List all available models
available = list_models()
print(f"Available models: {len(available)}")

# Get model class by name
vae_class = get_model_class("vae")

# Register custom model
from my_models import CustomVAE
register_model("custom_vae", CustomVAE)

Documentation: Model Registry

Training

All models follow a unified training interface:

from artifex.generative_models.training import Trainer
from artifex.generative_models.core.configuration import TrainingConfig

training_config = TrainingConfig(
    batch_size=128,
    num_epochs=100,
    optimizer={"type": "adam", "learning_rate": 1e-3},
    scheduler={"type": "cosine", "warmup_steps": 1000}
)

trainer = Trainer(
    model=model,
    training_config=training_config,
    train_dataset=train_data,
    val_dataset=val_data
)

trainer.train()

Documentation:

• Training Guide - Complete training guide
• Distributed Training - Multi-GPU/TPU training

Evaluation

Evaluate models with modality-specific metrics:

from artifex.benchmarks import EvaluationFramework

framework = EvaluationFramework(
    model=model,
    modality="image",
    metrics=["fid", "inception_score", "lpips"]
)

results = framework.evaluate(test_dataset)
print(results)

Documentation: Benchmarks

Examples

Hands-on examples for each model family:

• VAE on MNIST - Basic VAE training
• GAN on MNIST - Image generation
• Diffusion on MNIST - Image generation
• Flow on MNIST - Density estimation
• Protein generation - Geometric models

Contributing

Add new models to Artifex:

1. Implement model following protocols in core/protocols.py
2. Add to appropriate directory (vae/, gan/, diffusion/, etc.)
3. Register in model registry
4. Add comprehensive tests
5. Document API and usage

Documentation: Contributing Guide

API Statistics

Current model coverage:

• Total modules: 67
• Total classes: 135
• Total functions: 482
• Model families: 7
• Conditioning methods: 4
• Sampling methods: 15+

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• User Guides

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  Deep dive into each model family with examples and best practices

  Browse guides

• API Reference

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  Complete API documentation for all models and components

  API docs

• Tutorials

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  Step-by-step tutorials for common tasks and workflows

  Start learning

• Examples

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  Working code examples for all model types

  See examples