Instructions to use PollardWeights/Spark-X2.5-4B-Pollard with libraries, inference providers, notebooks, and local apps. Follow these links to get started.

Libraries

How to use PollardWeights/Spark-X2.5-4B-Pollard with Trellis:

# No code snippets available yet for this library.

# To use this model, check the repository files and the library's documentation.

# Want to help? PRs adding snippets are welcome at:
# https://github.com/huggingface/huggingface.js

Notebooks
Google Colab
Kaggle
Local Apps Settings

llama.cpp

How to use PollardWeights/Spark-X2.5-4B-Pollard with llama.cpp:

Install (macOS, Linux)

curl -LsSf https://llama.app/install.sh | sh
# Start a local OpenAI-compatible server with a web UI:
llama serve -hf PollardWeights/Spark-X2.5-4B-Pollard:IQ3_S
# Run inference directly in the terminal:
llama cli -hf PollardWeights/Spark-X2.5-4B-Pollard:IQ3_S

Install from WinGet (Windows)

winget install llama.cpp
# Start a local OpenAI-compatible server with a web UI:
llama serve -hf PollardWeights/Spark-X2.5-4B-Pollard:IQ3_S
# Run inference directly in the terminal:
llama cli -hf PollardWeights/Spark-X2.5-4B-Pollard:IQ3_S

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 PollardWeights/Spark-X2.5-4B-Pollard:IQ3_S
# Run inference directly in the terminal:
./llama-cli -hf PollardWeights/Spark-X2.5-4B-Pollard:IQ3_S

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 PollardWeights/Spark-X2.5-4B-Pollard:IQ3_S
# Run inference directly in the terminal:
./build/bin/llama-cli -hf PollardWeights/Spark-X2.5-4B-Pollard:IQ3_S

Use Docker

docker model run hf.co/PollardWeights/Spark-X2.5-4B-Pollard:IQ3_S

LM Studio
Jan

vLLM

How to use PollardWeights/Spark-X2.5-4B-Pollard with vLLM:

Install from pip and serve model

# Install vLLM from pip:
pip install vllm
# Start the vLLM server:
vllm serve "PollardWeights/Spark-X2.5-4B-Pollard"
# Call the server using curl (OpenAI-compatible API):
curl -X POST "http://localhost:8000/v1/chat/completions" \
	-H "Content-Type: application/json" \
	--data '{
		"model": "PollardWeights/Spark-X2.5-4B-Pollard",
		"messages": [
			{
				"role": "user",
				"content": "What is the capital of France?"
			}
		]
	}'

Use Docker

docker model run hf.co/PollardWeights/Spark-X2.5-4B-Pollard:IQ3_S

Ollama
How to use PollardWeights/Spark-X2.5-4B-Pollard with Ollama:
```
ollama run hf.co/PollardWeights/Spark-X2.5-4B-Pollard:IQ3_S
```
Unsloth Desktop

How to use PollardWeights/Spark-X2.5-4B-Pollard with Pi:

Start the llama.cpp server

# Install llama.cpp:
brew install llama.cpp
# Start a local OpenAI-compatible server:
llama serve -hf PollardWeights/Spark-X2.5-4B-Pollard:IQ3_S

Configure the model in Pi

# Install Pi:
npm install -g @earendil-works/pi-coding-agent
# Add to ~/.pi/agent/models.json:
{
  "providers": {
    "llama-cpp": {
      "baseUrl": "http://localhost:8080/v1",
      "api": "openai-completions",
      "apiKey": "none",
      "models": [
        {
          "id": "PollardWeights/Spark-X2.5-4B-Pollard:IQ3_S"
        }
      ]
    }
  }
}

Run Pi

# Start Pi in your project directory:
pi

Docker Model Runner
How to use PollardWeights/Spark-X2.5-4B-Pollard with Docker Model Runner:
```
docker model run hf.co/PollardWeights/Spark-X2.5-4B-Pollard:IQ3_S
```

Lemonade

How to use PollardWeights/Spark-X2.5-4B-Pollard with Lemonade:

Pull the model

# Download Lemonade from https://lemonade-server.ai/
lemonade pull PollardWeights/Spark-X2.5-4B-Pollard:IQ3_S

Run and chat with the model

lemonade run user.Spark-X2.5-4B-Pollard-IQ3_S

List all available models

lemonade list

Hermes Agent

How to use PollardWeights/Spark-X2.5-4B-Pollard with Hermes Agent:

Start the llama.cpp server

# Install llama.cpp:
brew install llama.cpp
# Start a local OpenAI-compatible server:
llama serve -hf PollardWeights/Spark-X2.5-4B-Pollard:IQ3_S

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 PollardWeights/Spark-X2.5-4B-Pollard:IQ3_S

Run Hermes

hermes

Atomic Chat

OpenClaw

How to use PollardWeights/Spark-X2.5-4B-Pollard with OpenClaw:

Start the llama.cpp server

# Install llama.cpp:
brew install llama.cpp
# Start a local OpenAI-compatible server:
llama serve -hf PollardWeights/Spark-X2.5-4B-Pollard:IQ3_S

Configure OpenClaw

# Install OpenClaw:
npm install -g openclaw@latest
# Register the local server and set it as the default model:
openclaw onboard --non-interactive --mode local \
  --auth-choice custom-api-key \
  --custom-base-url http://127.0.0.1:8080/v1 \
  --custom-model-id "PollardWeights/Spark-X2.5-4B-Pollard:IQ3_S" \
  --custom-provider-id llama-cpp \
  --custom-compatibility openai \
  --custom-text-input \
  --accept-risk \
  --skip-health

Run OpenClaw

openclaw agent --local --agent main --message "Hello from Hugging Face"

Spark-X2.5-4B — Pollard

Pollard shrank this model: 8.0 GB (f16) → 1.93 GB — 76% smaller, 4.1× down.

The smallest rung here; larger, higher-fidelity rungs are listed below.

format this model's size

f16 8.0 GB

Q8_0 ~4.2 GB

Q6_K ~3.3 GB

Q4_K_M ~2.3 GB

PollardMix (this repo's IQ3_S) 1.93 GB

format	this model's size
f16	8.0 GB
Q8_0	~4.2 GB
Q6_K	~3.3 GB
Q4_K_M	~2.3 GB
PollardMix (this repo's IQ3_S)	1.93 GB

Pollard builds of XHToken/Spark-X2.5-4B made with Pollard Weights — a ladder of measured-allocation quants (bits placed by per-layer sensitivity, not a uniform crush).

Standard GGUF — measured K/i-quant ladder (no trellis flagship yet: the spark2_5 arch isn't in ik_llama.cpp). Runs in a recent llama.cpp / Ollama / LM Studio (see Errata).

Available files (Calib 3.0 corpus, ctx 512, 6 chunks)

f16 reference PPL 6.091.

file	PPL	size	Mean KLD	notes
`Spark-X2.5-4B-Pollard-IQ3_S.gguf`	6.781	1.93 GB	—	smallest
`Spark-X2.5-4B-Pollard-IQ4_XS.gguf`	6.207	2.42 GB	—	recommended default
`Spark-X2.5-4B-Pollard-Q6_K.gguf`	6.099	3.38 GB	—	near-lossless

Usage

llama-cli -m Spark-X2.5-4B-Pollard-IQ3_S.gguf -p "Explain why the sky is blue." --temp 0.7
ollama run hf.co/PollardWeights/Spark-X2.5-4B-Pollard

Errata

Requires a recent llama.cpp (Sept 2026+, with spark2_5 architecture support) — older builds report unknown architecture 'spark2_5'. Runs in stock llama.cpp / Ollama / LM Studio once updated.
Trellis (IQ*_KT) quants need ik_llama.cpp to build/run; K-quants run in any recent llama.cpp.
Measured allocation places bits by per-layer sensitivity under a size budget.
Single machine; replication invited.

Built with Pollard Weights — frontier models, small hardware, no compromise.

Downloads last month: -

GGUF

Model size

4B params

Architecture

spark2_5

Hardware compatibility

3-bit

4-bit

6-bit

Model tree for PollardWeights/Spark-X2.5-4B-Pollard

Base model

XHToken/Spark-X2.5-4B-Base

Finetuned

XHToken/Spark-X2.5-4B

Quantized

(21)

this model

PollardWeights
/

Spark-X2.5-4B-Pollard

Spark-X2.5-4B — Pollard

Pollard shrank this model: 8.0 GB (f16) → 1.93 GB — 76% smaller, 4.1× down.

Available files (Calib 3.0 corpus, ctx 512, 6 chunks)

Usage

Errata

Model tree for PollardWeights/Spark-X2.5-4B-Pollard