Zen LM

Frontier language models from 600M to 480B parameters. Open-weight models optimized for edge devices through cloud-scale deployments, built on the Zen architecture with efficient inference via Rust, MLX, and GGUF.

Zen LM develops state-of-the-art language models spanning ten modalities from 600M (embedded) to 480B (frontier research). All models use the Zen architecture with RoPE embeddings, SwiGLU activation, grouped-query attention, and Flash Attention 2. Available through the Hanzo LLM Gateway, Hugging Face, vLLM, and local inference via MLX/GGUF.

Quick Start

# Using Hanzo LLM Gateway
from hanzo import Client

client = Client()
response = client.chat.completions.create(
    model="zenlm/zen4-pro",
    messages=[{"role": "user", "content": "Hello!"}]
)

# Using Transformers
from transformers import AutoModelForCausalLM, AutoTokenizer
model = AutoModelForCausalLM.from_pretrained("zenlm/zen4-pro")

Model Family

Language Models

Model	Parameters	Context	Use Case
zen-coder-480b	480B (MoE)	256K	Frontier code
zen4-max	397B (MoE)	128K	Frontier reasoning
zen-max	235B (MoE)	128K	Production flagship
zen4-thinking	80B (MoE)	128K	Deep reasoning
zen4-coder-pro	80B (MoE)	128K	Professional code
zen-voyager	32B	128K	Balanced
zen4-mini	8B	128K	Fast inference
zen-eco	4B	32K	Edge devices
zen-nano	0.6B	8K	Embedded

Multimodal

Model	Type	Description
zen-omni	Audio+Vision	Hypermodal 30B MoE
zen-vl	Vision	Vision-language models (4B/8B/30B)
zen-video	Video	High-quality video synthesis
zen-scribe	Speech	Speech recognition
zen-translator	Translation	Real-time multimodal translation

Core Projects

Project	Description
zen	Zen AI model family -- efficient models for edge and cloud
engine	High-performance inference engine -- Rust/MLX/GGUF
gym	Unified fine-tuning for 100+ LLMs and VLMs
zen-omni	Zen-Omni 30B -- hypermodal AI with MLX/GGUF
docs	Documentation and model cards

Ecosystem

Organization	Focus	Link
Hanzo AI	AI infrastructure, LLM gateway, MCP tools	github.com/hanzoai
Lux Network	Post-quantum blockchain, FHE, multi-consensus	github.com/luxfi
Zen LM	Frontier language models, 600M-480B parameters	github.com/zenlm
Zoo Labs	Open AI research, DeSci, 501(c)(3) foundation	github.com/zoo-labs
Lux FHE	Fully homomorphic encryption research + SDK	github.com/luxfhe
Lux C++	High-performance C++ libraries	github.com/luxcpp
Hanzo KMS	Enterprise secret management	github.com/hanzokms
Hanzo ID	Identity, OAuth2/OIDC, WebAuthn	github.com/hanzoid

Resources

zenlm.org -- Website
huggingface.co/zenlm -- Models on Hugging Face
github.com/zenlm/docs -- Documentation

Apache 2.0 for code, model-specific licenses for weights.

Co-developed by Hanzo AI and Zoo Labs

README.md