Instructions to use HCHs/RivetCoder-9B-A4B-FP8 with libraries, inference providers, notebooks, and local apps. Follow these links to get started.

Libraries

How to use HCHs/RivetCoder-9B-A4B-FP8 with Transformers:

# Use a pipeline as a high-level helper
from transformers import pipeline

pipe = pipeline("text-generation", model="HCHs/RivetCoder-9B-A4B-FP8", trust_remote_code=True)
messages = [
    {"role": "user", "content": "Who are you?"},
]
pipe(messages)

# Load model directly
from transformers import AutoModelForCausalLM
model = AutoModelForCausalLM.from_pretrained("HCHs/RivetCoder-9B-A4B-FP8", trust_remote_code=True, device_map="auto")

Notebooks
Google Colab
Kaggle
Local Apps Settings

vLLM

How to use HCHs/RivetCoder-9B-A4B-FP8 with vLLM:

Install from pip and serve model

# Install vLLM from pip:
pip install vllm
# Start the vLLM server:
vllm serve "HCHs/RivetCoder-9B-A4B-FP8"
# Call the server using curl (OpenAI-compatible API):
curl -X POST "http://localhost:8000/v1/chat/completions" \
	-H "Content-Type: application/json" \
	--data '{
		"model": "HCHs/RivetCoder-9B-A4B-FP8",
		"messages": [
			{
				"role": "user",
				"content": "What is the capital of France?"
			}
		]
	}'

Use Docker

docker model run hf.co/HCHs/RivetCoder-9B-A4B-FP8

SGLang

How to use HCHs/RivetCoder-9B-A4B-FP8 with SGLang:

Install from pip and serve model

# Install SGLang from pip:
pip install sglang
# Start the SGLang server:
python3 -m sglang.launch_server \
    --model-path "HCHs/RivetCoder-9B-A4B-FP8" \
    --host 0.0.0.0 \
    --port 30000
# Call the server using curl (OpenAI-compatible API):
curl -X POST "http://localhost:30000/v1/chat/completions" \
	-H "Content-Type: application/json" \
	--data '{
		"model": "HCHs/RivetCoder-9B-A4B-FP8",
		"messages": [
			{
				"role": "user",
				"content": "What is the capital of France?"
			}
		]
	}'

Use Docker images

docker run --gpus all \
    --shm-size 32g \
    -p 30000:30000 \
    -v ~/.cache/huggingface:/root/.cache/huggingface \
    --env "HF_TOKEN=<secret>" \
    --ipc=host \
    lmsysorg/sglang:latest \
    python3 -m sglang.launch_server \
        --model-path "HCHs/RivetCoder-9B-A4B-FP8" \
        --host 0.0.0.0 \
        --port 30000
# Call the server using curl (OpenAI-compatible API):
curl -X POST "http://localhost:30000/v1/chat/completions" \
	-H "Content-Type: application/json" \
	--data '{
		"model": "HCHs/RivetCoder-9B-A4B-FP8",
		"messages": [
			{
				"role": "user",
				"content": "What is the capital of France?"
			}
		]
	}'

Docker Model Runner
How to use HCHs/RivetCoder-9B-A4B-FP8 with Docker Model Runner:
```
docker model run hf.co/HCHs/RivetCoder-9B-A4B-FP8
```

RivetCoder-9B-A4B-FP8 / NOTICE.md

HCHs

Accelerate remaining FP8 linears with direct scaled-mm

4d29b4b verified about 14 hours ago

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Attribution notice

RivetCoder-9B-A4B combines the following sources:

Host model: LiquidAI/LFM2.5-2.6B, revision 654f9463ce32b05d0429d76fe1f580b27d4c1ac0, under the LFM Open License v1.0.
Expert donor: zai-org/GLM-5.3-Flash, revision 3f1971b7b5f7a528c9c4ef6212c8785298a8c24a, under the MIT License.
Router sequence teacher: qwen/qwen3.8-27b, accessed through a local LM Studio endpoint. No Qwen weights are included.
Architectural reference: Akahsizrr/fuse-1-Lite, revision 430c959e47556ae53fed18a9d97f7cf30876e6ff.
Fast-serving kernel reference: kernels-community/finegrained-fp8, whose Triton grouped-FP8 and activation-quantization kernels are Copyright 2026 The Hugging Face Inc. team and licensed under Apache License 2.0. RivetCoder's adaptation adds per-output scales, TorchAO expert-bank packing, deterministic Top-4 reduction, direct FP8 Linear dispatch using the checkpoint's existing qdata/scales, and automatic Windows MSVC environment discovery.

Modifications and new work include GLM expert selection, a fixed tied identity-Hadamard bridge, expert/router weight folding, per-layer Top-4 routing, token gating, bounded residual scaling, Qwen-supervised routing-control training, the custom fuse_glm Transformers implementation, and the inference-only grouped-FP8 serving runtime shipped in this repository.

See provenance/ for the complete local build record with personal filesystem paths removed.