Instructions to use nivvis/Step-3.5-Flash-REAP-128B-A11B-GGUF with libraries, inference providers, notebooks, and local apps. Follow these links to get started.

Libraries

How to use nivvis/Step-3.5-Flash-REAP-128B-A11B-GGUF with llama-cpp-python:

# !pip install llama-cpp-python

from llama_cpp import Llama

llm = Llama.from_pretrained(
	repo_id="nivvis/Step-3.5-Flash-REAP-128B-A11B-GGUF",
	filename="Step-3.5-Flash-REAP-128B-A11B-Q4_K_M.gguf-00001-of-00004.gguf",
)

llm.create_chat_completion(
	messages = [
		{
			"role": "user",
			"content": "What is the capital of France?"
		}
	]
)

Notebooks
Google Colab
Kaggle
Local Apps Settings

llama.cpp

How to use nivvis/Step-3.5-Flash-REAP-128B-A11B-GGUF with llama.cpp:

Install from brew

brew install llama.cpp
# Start a local OpenAI-compatible server with a web UI:
llama-server -hf nivvis/Step-3.5-Flash-REAP-128B-A11B-GGUF:Q4_K_M
# Run inference directly in the terminal:
llama-cli -hf nivvis/Step-3.5-Flash-REAP-128B-A11B-GGUF:Q4_K_M

Install from WinGet (Windows)

winget install llama.cpp
# Start a local OpenAI-compatible server with a web UI:
llama-server -hf nivvis/Step-3.5-Flash-REAP-128B-A11B-GGUF:Q4_K_M
# Run inference directly in the terminal:
llama-cli -hf nivvis/Step-3.5-Flash-REAP-128B-A11B-GGUF:Q4_K_M

Use pre-built binary

# Download pre-built binary from:
# https://github.com/ggerganov/llama.cpp/releases
# Start a local OpenAI-compatible server with a web UI:
./llama-server -hf nivvis/Step-3.5-Flash-REAP-128B-A11B-GGUF:Q4_K_M
# Run inference directly in the terminal:
./llama-cli -hf nivvis/Step-3.5-Flash-REAP-128B-A11B-GGUF:Q4_K_M

Build from source code

git clone https://github.com/ggerganov/llama.cpp.git
cd llama.cpp
cmake -B build
cmake --build build -j --target llama-server llama-cli
# Start a local OpenAI-compatible server with a web UI:
./build/bin/llama-server -hf nivvis/Step-3.5-Flash-REAP-128B-A11B-GGUF:Q4_K_M
# Run inference directly in the terminal:
./build/bin/llama-cli -hf nivvis/Step-3.5-Flash-REAP-128B-A11B-GGUF:Q4_K_M

Use Docker

docker model run hf.co/nivvis/Step-3.5-Flash-REAP-128B-A11B-GGUF:Q4_K_M

LM Studio
Jan

vLLM

How to use nivvis/Step-3.5-Flash-REAP-128B-A11B-GGUF with vLLM:

Install from pip and serve model

# Install vLLM from pip:
pip install vllm
# Start the vLLM server:
vllm serve "nivvis/Step-3.5-Flash-REAP-128B-A11B-GGUF"
# Call the server using curl (OpenAI-compatible API):
curl -X POST "http://localhost:8000/v1/chat/completions" \
	-H "Content-Type: application/json" \
	--data '{
		"model": "nivvis/Step-3.5-Flash-REAP-128B-A11B-GGUF",
		"messages": [
			{
				"role": "user",
				"content": "What is the capital of France?"
			}
		]
	}'

Use Docker

docker model run hf.co/nivvis/Step-3.5-Flash-REAP-128B-A11B-GGUF:Q4_K_M

Ollama
How to use nivvis/Step-3.5-Flash-REAP-128B-A11B-GGUF with Ollama:
```
ollama run hf.co/nivvis/Step-3.5-Flash-REAP-128B-A11B-GGUF:Q4_K_M
```

Unsloth Studio

How to use nivvis/Step-3.5-Flash-REAP-128B-A11B-GGUF with Unsloth Studio:

Install Unsloth Studio (macOS, Linux, WSL)

curl -fsSL https://unsloth.ai/install.sh | sh
# Run unsloth studio
unsloth studio -H 0.0.0.0 -p 8888
# Then open http://localhost:8888 in your browser
# Search for nivvis/Step-3.5-Flash-REAP-128B-A11B-GGUF to start chatting

Install Unsloth Studio (Windows)

irm https://unsloth.ai/install.ps1 | iex
# Run unsloth studio
unsloth studio -H 0.0.0.0 -p 8888
# Then open http://localhost:8888 in your browser
# Search for nivvis/Step-3.5-Flash-REAP-128B-A11B-GGUF to start chatting

Using HuggingFace Spaces for Unsloth

# No setup required
# Open https://huggingface.co/spaces/unsloth/studio in your browser
# Search for nivvis/Step-3.5-Flash-REAP-128B-A11B-GGUF to start chatting

How to use nivvis/Step-3.5-Flash-REAP-128B-A11B-GGUF with Pi:

Start the llama.cpp server

# Install llama.cpp:
brew install llama.cpp
# Start a local OpenAI-compatible server:
llama-server -hf nivvis/Step-3.5-Flash-REAP-128B-A11B-GGUF:Q4_K_M

Configure the model in Pi

# Install Pi:
npm install -g @mariozechner/pi-coding-agent
# Add to ~/.pi/agent/models.json:
{
  "providers": {
    "llama-cpp": {
      "baseUrl": "http://localhost:8080/v1",
      "api": "openai-completions",
      "apiKey": "none",
      "models": [
        {
          "id": "nivvis/Step-3.5-Flash-REAP-128B-A11B-GGUF:Q4_K_M"
        }
      ]
    }
  }
}

Run Pi

# Start Pi in your project directory:
pi

Hermes Agent new

How to use nivvis/Step-3.5-Flash-REAP-128B-A11B-GGUF with Hermes Agent:

Start the llama.cpp server

# Install llama.cpp:
brew install llama.cpp
# Start a local OpenAI-compatible server:
llama-server -hf nivvis/Step-3.5-Flash-REAP-128B-A11B-GGUF:Q4_K_M

Configure Hermes

# Install Hermes:
curl -fsSL https://hermes-agent.nousresearch.com/install.sh | bash
hermes setup
# Point Hermes at the local server:
hermes config set model.provider custom
hermes config set model.base_url http://127.0.0.1:8080/v1
hermes config set model.default nivvis/Step-3.5-Flash-REAP-128B-A11B-GGUF:Q4_K_M

Run Hermes

hermes

Docker Model Runner
How to use nivvis/Step-3.5-Flash-REAP-128B-A11B-GGUF with Docker Model Runner:
```
docker model run hf.co/nivvis/Step-3.5-Flash-REAP-128B-A11B-GGUF:Q4_K_M
```

Lemonade

How to use nivvis/Step-3.5-Flash-REAP-128B-A11B-GGUF with Lemonade:

Pull the model

# Download Lemonade from https://lemonade-server.ai/
lemonade pull nivvis/Step-3.5-Flash-REAP-128B-A11B-GGUF:Q4_K_M

Run and chat with the model

lemonade run user.Step-3.5-Flash-REAP-128B-A11B-GGUF-Q4_K_M

List all available models

lemonade list

Step-3.5-Flash-REAP-128B-A11B GGUF

GGUF quantizations of lkevincc0/Step-3.5-Flash-REAP-128B-A11B, a REAP-pruned variant of stepfun-ai/Step-3.5-Flash.

Available quantizations

Quantization	File size	Files
Q5_K_M	80 GB	5 split parts
Q4_K_M	68 GB	4 split parts

About the model

Architecture: Step3p5ForCausalLM (Sparse MoE)
Original parameters: 196B total, 11B active per token (288 experts, top-8 routing)
REAP-pruned: 128B total, 11B active per token (173 experts, top-8 routing — 40% expert pruning)

How to run

# Basic inference
llama-cli -m Step-3.5-Flash-REAP-128B-A11B-Q5_K_M.gguf-00001-of-00005.gguf \
  -c 16384 -b 2048 -ub 2048 -fa on --temp 1.0 \
  -p "What's your name?"

# Server mode
llama-server -m Step-3.5-Flash-REAP-128B-A11B-Q5_K_M.gguf-00001-of-00005.gguf \
  -c 16384 -b 2048 -ub 2048 -fa on -ngl 99

Note: for split GGUFs, point llama.cpp at the first part — it finds the rest automatically.

Quantization details

Converted from the original safetensors to bf16 GGUF using convert_hf_to_gguf.py, then quantized with llama-quantize.

Quantized using llama.cpp at commit 39bf692af.

Downloads last month: 53

GGUF

Model size

121B params

Architecture

step35

Hardware compatibility

4-bit

5-bit

Model tree for nivvis/Step-3.5-Flash-REAP-128B-A11B-GGUF

Base model

stepfun-ai/Step-3.5-Flash

Quantized

lkevincc0/Step-3.5-Flash-REAP-128B-A11B

Quantized

(4)

this model