How to use from
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 "amanwalksdownthestreet/Devstral-2-123B-Instruct-2512-exl3" \
    --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": "amanwalksdownthestreet/Devstral-2-123B-Instruct-2512-exl3",
		"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 "amanwalksdownthestreet/Devstral-2-123B-Instruct-2512-exl3" \
        --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": "amanwalksdownthestreet/Devstral-2-123B-Instruct-2512-exl3",
		"messages": [
			{
				"role": "user",
				"content": "What is the capital of France?"
			}
		]
	}'
Quick Links

ExLlamaV3 quantizations of Devstral-2-123B-Instruct-2512 with tensor-level (L3) optimization. Maximum effort applied towards the goal of achieving the best possible quantizations at the expense of time and compute.

Using this measurement.json file and the base quants provided, additional highly-optimized quantizations can be made in seconds at any reasonable bpw by anyone. All work done with ExLlamaV3 v0.0.18.

Optimized

VRAM-targeted quants using exl3's measure.py → optimize.py pipeline.

Size bpw Target
3.20bpw-h6-opt 50 GB 3.20 72GB @ 256k
3.90bpw-h6-opt 60 GB 3.90 72GB @ 128k
4.75bpw-h6-opt 72 GB 4.75 96GB @ 256k
5.45bpw-h6-opt 82 GB 5.45 96GB @ 128k
5.70bpw-h6-opt 85 GB 5.70 128GB @ 256k

The 5.70bpw quant hit the optimization ceiling - requesting 6.75bpw produced 5.70bpw output, indicating no further beneficial tensor swaps available.

Base

Size bpw
3.0bpw-h6 47 GB 3.0
4.0bpw-h6 61 GB 4.0
5.0bpw-h6 76 GB 5.0
6.0bpw-h6 90 GB 6.0
7.0bpw-h6 104 GB 7.0
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