Instructions to use microsoft/MagenticBrain with libraries, inference providers, notebooks, and local apps. Follow these links to get started.

Libraries

How to use microsoft/MagenticBrain with Transformers:

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

pipe = pipeline("text-generation", model="microsoft/MagenticBrain")
messages = [
    {"role": "user", "content": "Who are you?"},
]
pipe(messages)

# Load model directly
from transformers import AutoTokenizer, AutoModelForCausalLM

tokenizer = AutoTokenizer.from_pretrained("microsoft/MagenticBrain")
model = AutoModelForCausalLM.from_pretrained("microsoft/MagenticBrain", device_map="auto")
messages = [
    {"role": "user", "content": "Who are you?"},
]
inputs = tokenizer.apply_chat_template(
	messages,
	add_generation_prompt=True,
	tokenize=True,
	return_dict=True,
	return_tensors="pt",
).to(model.device)

outputs = model.generate(**inputs, max_new_tokens=40)
print(tokenizer.decode(outputs[0][inputs["input_ids"].shape[-1]:]))

Notebooks
Google Colab
Kaggle
Local Apps Settings

vLLM

How to use microsoft/MagenticBrain with vLLM:

Install from pip and serve model

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

Use Docker

docker model run hf.co/microsoft/MagenticBrain

SGLang

How to use microsoft/MagenticBrain 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 "microsoft/MagenticBrain" \
    --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": "microsoft/MagenticBrain",
		"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 "microsoft/MagenticBrain" \
        --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": "microsoft/MagenticBrain",
		"messages": [
			{
				"role": "user",
				"content": "What is the capital of France?"
			}
		]
	}'

Docker Model Runner
How to use microsoft/MagenticBrain with Docker Model Runner:
```
docker model run hf.co/microsoft/MagenticBrain
```

yashlara commited on May 13

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@@ -130,12 +130,15 @@ Then call `/v1/chat/completions` with `tools=[...]` as you would with any OpenAI
 ### Recommended sampling
 ```
-temperature = 0.6
 top_p = 0.8
 top_k = 20
 ```
-These match the Qwen3-14B base recommendations and work well for orchestration. Lower the temperature for stricter tool selection.
 ## Training

 ### Recommended sampling
 ```
+enable_thinking = false
+temperature = 0.7
 top_p = 0.8
 top_k = 20
+min_p = 0
+presence_penalty = 1
 ```
+MagenticBrain runs in non-thinking mode — keep `enable_thinking=False` in the chat template. Do not use greedy decoding; it causes endless repetition on this model family. Lower the temperature if you need stricter, more deterministic tool selection.
 ## Training