ZSE - Z Server Engine

ZSE is free and open source. If it helps you, consider sponsoring us.
Sponsors get exclusive business perks. Mail us at zse@zyoralabs.com for details.

Ultra memory-efficient LLM inference engine with native INT4 CUDA kernels.

Run 32B models on 24GB GPUs. Run 7B models on 8GB GPUs. Fast cold starts, single-file deployment.

🆕 v1.4.1: Model Hub + Pull Commands

Train 7B models on 8GB GPUs. Train 70B models on 48GB GPUs.

from zse.format import load_zse_model
from zse.training import LoRAConfig, add_lora_to_model, save_lora_adapter

# Load INT4 model (uses ~6GB for 7B)
model, tokenizer, info = load_zse_model("model.zse", device="cuda")

# Add LoRA adapters (~1% trainable params)
config = LoRAConfig(rank=16, alpha=32)
model = add_lora_to_model(model, config)

# Train as usual with PyTorch/HuggingFace
# ... your training loop ...

# Save adapter (tiny file, ~25MB for 7B)
save_lora_adapter(model, "my_adapter.safetensors")

Install training dependencies: pip install zllm-zse[training]

🚀 Benchmarks (Verified, March 2026)

ZSE Custom Kernel (Default)

Model	File Size	VRAM	Speed	Cold Start	GPU
Qwen 7B	5.57 GB	5.67 GB	37.2 tok/s	5.7s	H200
Qwen 14B	9.95 GB	10.08 GB	20.8 tok/s	10.5s	H200
Qwen 32B	19.23 GB	19.47 GB	10.9 tok/s	20.4s	H200
Qwen 72B	41.21 GB	41.54 GB	6.3 tok/s	51.8s	H200

ZSE bnb Backend (Alternate)

Model	VRAM	Speed	Cold Start
Qwen 7B	6.57 GB	45.6 tok/s	6.0s
Qwen 14B	11.39 GB	27.6 tok/s	7.1s
Qwen 32B	22.27 GB	20.4 tok/s	20.8s
Qwen 72B	47.05 GB	16.4 tok/s	53.0s

VRAM Comparison

Model	Custom Kernel	bnb Backend	Savings
7B	5.67 GB	6.57 GB	-0.90 GB (14%)
14B	10.08 GB	11.39 GB	-1.31 GB (12%)
32B	19.47 GB	22.27 GB	-2.80 GB (13%)
72B	41.54 GB	47.05 GB	-5.51 GB (12%)

GPU Compatibility

GPU	VRAM	Max Model
RTX 3070/4070	8GB	7B
RTX 3080	12GB	14B
RTX 3090/4090	24GB	32B
A100-40GB	40GB	32B
A100-80GB / H200	80-141GB	72B

Key Features

📦 Single .zse File: Model + tokenizer + config in one file
🚫 No Network Calls: Everything embedded, works offline
⚡ ZSE Custom Kernel: Native INT4 inference with maximum VRAM efficiency
🧠 Memory Efficient: 72B in 41GB, 32B in 19GB, 7B in 5.7GB VRAM
🏃 Fast Cold Start: 5.7s for 7B, 20s for 32B, 52s for 72B
🎯 Dual Backend: Custom kernel (default) or bnb backend (alternate)
🔥 QLoRA Training: Fine-tune INT4 models with LoRA adapters (NEW in v1.4.0)
📄 Built-in RAG with .zpf: 25% fewer LLM tokens at 100% accuracy vs plain chunking

Installation

pip install zllm-zse

Requirements:

Python 3.11+
CUDA GPU (8GB+ VRAM recommended)
bitsandbytes (auto-installed)

Quick Start

1. Pull a Pre-Converted Model (Fastest)

# Download ready-to-use .zse model (no GPU needed for conversion)
zse pull qwen-7b          # 5.18 GB download
zse pull mistral-7b       # 3.86 GB download
zse pull qwen-0.5b        # 0.69 GB download

# Browse available models
zse list
zse list --cached

2. Or Convert Model to .zse Format (One-Time)

# Convert any HuggingFace model
zse convert Qwen/Qwen2.5-7B-Instruct -o qwen7b.zse
zse convert Qwen/Qwen2.5-32B-Instruct -o qwen32b.zse

# Or in Python
from zse.format.writer import convert_model
convert_model("Qwen/Qwen2.5-7B-Instruct", "qwen7b.zse", quantization="int4")

2. Load and Run

from zse.format.reader_v2 import load_zse_model

# Load model (auto-detects optimal settings)
model, tokenizer, info = load_zse_model("qwen7b.zse")

# Generate
inputs = tokenizer("Write a poem about AI:", return_tensors="pt").to("cuda")
output = model.generate(**inputs, max_new_tokens=100)
print(tokenizer.decode(output[0], skip_special_tokens=True))

3. Start Server (OpenAI-Compatible)

zse serve qwen7b.zse --port 8000

import openai

client = openai.OpenAI(base_url="http://localhost:8000/v1", api_key="zse")
response = client.chat.completions.create(
    model="qwen7b",
    messages=[{"role": "user", "content": "Hello!"}]
)
print(response.choices[0].message.content)

.zse Format Benefits

Feature	HuggingFace	.zse Format
Cold start (7B)	45s	9s
Cold start (32B)	120s	24s
Network calls on load	Yes	No
Files to manage	Many	One
Quantization time	Runtime	Pre-done

.zpf: Built-in RAG with Token Cost Reduction

.zpf delivers 100% retrieval accuracy at 25% lower LLM token cost compared to plain chunking — tested on real noisy web content.

.zpf (Z Packed Format) is ZSE's built-in semantic document format for RAG. It compresses documents at write-time, stripping noise (cookie banners, nav, boilerplate, filler prose) while preserving what the LLM needs.

Cost Benchmark (CNN noisy web article)

Metric	.zpf	Plain Chunking
Correct answers	10/10	10/10
Tokens sent to LLM (avg/query)	943	1,257
Token reduction	25%	—
Cost per 1M queries (GPT-4o)	$2,357	$3,143
Annual savings at 1M queries	$786	—
Break-even	1 query per document	—

Quick Start

# Ingest a document into RAG store
zse rag add paper.pdf --title "ML Paper"

# Semantic search
zse rag search "What is batch normalization?" -k 5

# Get token-budgeted LLM context
zse rag context "What is batch normalization?" --max-tokens 500

# List all documents
zse rag list

# Export to open formats (zero vendor lock-in)
zse rag export paper.zpf -f markdown -o paper.md

# Inspect .zpf file metadata
zse rag inspect paper.zpf

# Show store stats
zse rag stats

# Re-embed with a different model
zse rag reindex --model all-MiniLM-L6-v2

# Remove a document
zse rag remove <doc_id>

from zse.core.zrag.pipeline import RAGPipeline

pipeline = RAGPipeline(store_dir="./my_store")
pipeline.ingest("noisy_article.md")

# Get LLM-ready context (token-budgeted)
context = pipeline.get_context("What is transfer learning?", max_tokens=500)
# ~25% fewer tokens than plain chunking, same answer quality

How It Works

Semantic chunking — splits by content type (11 block types: CODE, TABLE, DEFINITION, PROCEDURE, etc.)
10-layer compression — strips filler phrases, verbose patterns, redundant qualifiers, noise lines
Contextual embedding — each block embeds with parent section hierarchy for cross-section retrieval
Hybrid retrieval — 0.6× embedding similarity + 0.4× BM25, with size normalization, block-type boosting, and identifier-aware scoring

Multi-GPU: Tensor Parallelism & Pipeline Parallelism

Run models across multiple GPUs to reduce per-GPU VRAM or serve larger models.

# Tensor Parallelism — shard weights across GPUs (NCCL all-reduce)
zse serve qwen-32b -tp 2 --port 8000

# Pipeline Parallelism — split layers across GPUs (NCCL send/recv)
zse serve qwen-72b -pp 4 --port 8000

# Hybrid TP+PP — 2D process grid
zse serve qwen-72b -tp 2 -pp 2 --port 8000

# Auto-detect — let ZSE pick optimal layout
zse serve qwen-72b --multi-gpu --port 8000

Multi-GPU Benchmarks (Qwen2.5-7B INT4, A10G GPUs)

Config	Speed	VRAM/GPU	vs Single GPU
Single GPU	23.1 tok/s	5.22 GB	baseline
TP=2	18.6 tok/s	3.76 GB	-28% VRAM
PP=2	23.1 tok/s	2.67 GB	-49% VRAM
TP=2 × PP=2	20.6 tok/s	1.6-2.1 GB	-65% VRAM

When to use what:

TP: Fastest inference, splits every layer. Best when GPUs are connected via NVLink.
PP: Best VRAM reduction, near-perfect memory split. Works over PCIe.
TP+PP: Maximum scale — run 72B on 4× consumer GPUs.

Advanced Usage

QLoRA Fine-Tuning (v1.4.0+)

Train any model with QLoRA - LoRA adapters on quantized INT4 base models.

# Install training dependencies
pip install zllm-zse[training]

from zse.format import load_zse_model, convert_model
from zse.training import (
    LoRAConfig, 
    add_lora_to_model, 
    save_lora_adapter,
    load_lora_adapter
)
import torch

# 1. Convert model to .zse (one-time)
convert_model("meta-llama/Llama-3-8B", "llama8b.zse", quantization="int4")

# 2. Load INT4 model
model, tokenizer, info = load_zse_model("llama8b.zse", device="cuda")

# 3. Add LoRA adapters
config = LoRAConfig(
    rank=16,              # LoRA rank (higher = more capacity)
    alpha=32,             # LoRA alpha (scaling factor)
    dropout=0.05,         # Dropout for regularization
    target_modules=["q_proj", "v_proj", "k_proj", "o_proj"]  # Which layers
)
model = add_lora_to_model(model, config)

# 4. Train with standard PyTorch
optimizer = torch.optim.AdamW(
    [p for p in model.parameters() if p.requires_grad], 
    lr=2e-4
)

for batch in dataloader:
    loss = model(**batch).loss
    loss.backward()
    optimizer.step()
    optimizer.zero_grad()

# 5. Save adapter (~25MB for 7B model)
save_lora_adapter(model, "my_adapter.safetensors")

# 6. Load adapter for inference
model, tokenizer, info = load_zse_model("llama8b.zse", lora="my_adapter.safetensors")

QLoRA VRAM Usage:

Model	Base VRAM	+ LoRA Training	Trainable Params
7B	6 GB	~8 GB	12M (0.2%)
14B	11 GB	~14 GB	25M (0.2%)
32B	20 GB	~26 GB	50M (0.2%)
70B	42 GB	~52 GB	100M (0.1%)

Control Caching Strategy

# Auto (default): Detect VRAM, pick optimal strategy
model, tok, info = load_zse_model("qwen7b.zse", cache_weights="auto")

# Force bnb mode (low VRAM, fast inference)
model, tok, info = load_zse_model("qwen7b.zse", cache_weights=False)

# Force FP16 cache (max speed, high VRAM)
model, tok, info = load_zse_model("qwen7b.zse", cache_weights=True)

Benchmark Your Setup

# Full benchmark
python3 -c "
import time, torch
from zse.format.reader_v2 import load_zse_model

t0 = time.time()
model, tokenizer, info = load_zse_model('qwen7b.zse')
print(f'Load: {time.time()-t0:.1f}s, VRAM: {torch.cuda.memory_allocated()/1e9:.1f}GB')

inputs = tokenizer('Hello', return_tensors='pt').to('cuda')
model.generate(**inputs, max_new_tokens=10)  # Warmup

prompt = 'Write a detailed essay about AI.'
inputs = tokenizer(prompt, return_tensors='pt').to('cuda')
torch.cuda.synchronize()
t0 = time.time()
out = model.generate(**inputs, max_new_tokens=200, do_sample=False)
torch.cuda.synchronize()
tokens = out.shape[1] - inputs['input_ids'].shape[1]
print(f'{tokens} tokens in {time.time()-t0:.2f}s = {tokens/(time.time()-t0):.1f} tok/s')
"

CLI Commands

# Model Management
zse pull <model>                    # Download pre-converted .zse model
zse list                            # Browse available models
zse list --cached                   # Show locally cached models
zse cached                          # Show cache details
zse convert <model_id> -o out.zse   # Convert HuggingFace model
zse info <model>                    # Show model info
zse hardware                        # Check GPU/VRAM

# Serving
zse serve <model> --port 8000       # Single GPU
zse serve <model> -tp 2 --port 8000 # Tensor parallel (2 GPUs)
zse serve <model> -pp 2 --port 8000 # Pipeline parallel (2 GPUs)
zse serve <model> -tp 2 -pp 2       # Hybrid TP+PP (4 GPUs)
zse serve <model> --multi-gpu       # Auto-detect optimal layout
zse chat <model>                    # Interactive chat

# RAG (.zpf)
zse rag add <file> [--title <t>]    # Ingest document
zse rag search <query> [-k <n>]     # Semantic search
zse rag context <query> [--max-tokens <n>]  # Token-budgeted context
zse rag list                        # List documents
zse rag remove <doc_id>             # Remove document
zse rag convert <file> [-o out.zpf] # Convert to .zpf only
zse rag inspect <zpf_path>          # Show .zpf metadata
zse rag export <zpf> [-f fmt]       # Export (markdown/jsonl/json)
zse rag stats                       # Store statistics
zse rag reindex [--model <name>]    # Re-embed with new model

# Auth (for gated models)
zse login
zse logout

🤗 Pre-Converted Models

13 models ready for instant download from huggingface.co/zse-zllm:

Model	Size	Pull Command
Qwen2.5-0.5B-Instruct	0.69 GB	`zse pull qwen-0.5b`
TinyLlama-1.1B-Chat	0.71 GB	`zse pull tinyllama-1.1b`
Qwen2.5-1.5B-Instruct	1.51 GB	`zse pull qwen-1.5b`
Qwen2.5-3B-Instruct	2.51 GB	`zse pull qwen-3b`
Qwen2.5-Coder-1.5B	1.51 GB	`zse pull qwen-coder-1.5b`
DeepSeek-Coder-6.7B	3.61 GB	`zse pull deepseek-6.7b`
Mistral-7B-Instruct	3.86 GB	`zse pull mistral-7b`
Qwen2.5-7B-Instruct	5.18 GB	`zse pull qwen-7b`
Qwen2.5-Coder-7B	5.18 GB	`zse pull qwen-coder-7b`
Qwen2.5-14B-Instruct	9.26 GB	`zse pull qwen-14b`
Qwen2.5-32B-Instruct	17.9 GB	`zse pull qwen-32b`
Mixtral-8x7B-Instruct	85.14 GB	`zse pull mixtral-8x7b`
Qwen2.5-72B-Instruct	38.38 GB	`zse pull qwen-72b`

How It Works

Conversion: Quantize HF model to INT4, pack weights, embed tokenizer + config
Loading: Memory-map .zse file, load INT4 weights directly to GPU
Inference: ZSE custom kernel (default) or bnb backend for matmul

┌─────────────────┐     ┌─────────────────┐     ┌─────────────────┐
│  HuggingFace    │────▶│   .zse File     │────▶│   GPU Model     │
│  Model (FP16)   │     │   (INT4 + tok)  │     │  (ZSE Kernel)   │
└─────────────────┘     └─────────────────┘     └─────────────────┘
    One-time             Single file             12% less VRAM
    conversion           ~0.5 bytes/param        vs bitsandbytes

OpenClaw Integration

Run local models with OpenClaw - the 24/7 AI assistant by @steipete.

# Start ZSE server
zse serve <model-name> --port 8000

# Configure OpenClaw to use local ZSE
export OPENAI_API_BASE=http://localhost:8000/v1
export OPENAI_API_KEY=zse

Or in OpenClaw's config.yaml:

llm:
  provider: openai-compatible
  api_base: http://localhost:8000/v1
  api_key: zse
  model: default

Benefits: 100% private, zero API costs, works offline, run ANY model.

Docker Deployment

# CPU
docker run -p 8000:8000 ghcr.io/zyora-dev/zse:latest

# GPU (NVIDIA)
docker run --gpus all -p 8000:8000 ghcr.io/zyora-dev/zse:gpu

# With model pre-loaded
docker run -p 8000:8000 -e ZSE_MODEL=Qwen/Qwen2.5-0.5B-Instruct ghcr.io/zyora-dev/zse:latest

See deploy/DEPLOY.md for full deployment guide including Runpod, Vast.ai, Railway, Render, and Kubernetes.

License

Apache 2.0

Contact

Website: zllm.in
Company: Zyora Labs
Email: zse@zyoralabs.com

Made with ❤️ by Zyora Labs

Name		Name	Last commit message	Last commit date
Latest commit History 69 Commits
benchmarks		benchmarks
configs		configs
csrc		csrc
deploy		deploy
docs		docs
tests		tests
zse		zse
.dockerignore		.dockerignore
.gitignore		.gitignore
.modalignore		.modalignore
CONTRIBUTING.md		CONTRIBUTING.md
Dockerfile		Dockerfile
FUNDING.json		FUNDING.json
FUNDING.yml		FUNDING.yml
LICENSE		LICENSE
README.md		README.md
code_of_conduct.md		code_of_conduct.md
docker-compose.yml		docker-compose.yml
funding.json		funding.json
pyproject.toml		pyproject.toml
railway.json		railway.json
render.yaml		render.yaml
setup.py		setup.py

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ZSE - Z Server Engine

🆕 v1.4.1: Model Hub + Pull Commands

🚀 Benchmarks (Verified, March 2026)

ZSE Custom Kernel (Default)

ZSE bnb Backend (Alternate)

VRAM Comparison

GPU Compatibility

Key Features

Installation

Quick Start

1. Pull a Pre-Converted Model (Fastest)

2. Or Convert Model to .zse Format (One-Time)

2. Load and Run

3. Start Server (OpenAI-Compatible)

.zse Format Benefits

.zpf: Built-in RAG with Token Cost Reduction

Cost Benchmark (CNN noisy web article)

Quick Start

How It Works

Multi-GPU: Tensor Parallelism & Pipeline Parallelism

Multi-GPU Benchmarks (Qwen2.5-7B INT4, A10G GPUs)

Advanced Usage

QLoRA Fine-Tuning (v1.4.0+)

Control Caching Strategy

Benchmark Your Setup

CLI Commands

🤗 Pre-Converted Models

How It Works

OpenClaw Integration

Docker Deployment

License

Sponsors

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