Instructions to use stepfun-ai/Step-3.5-Flash with libraries, inference providers, notebooks, and local apps. Follow these links to get started.

Libraries

How to use stepfun-ai/Step-3.5-Flash with Transformers:

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

pipe = pipeline("text-generation", model="stepfun-ai/Step-3.5-Flash", trust_remote_code=True)
messages = [
    {"role": "user", "content": "Who are you?"},
]
pipe(messages)

# Load model directly
from transformers import AutoModelForCausalLM
model = AutoModelForCausalLM.from_pretrained("stepfun-ai/Step-3.5-Flash", trust_remote_code=True, dtype="auto")

Inference
HuggingChat
Notebooks
Google Colab
Kaggle
Local Apps Settings

vLLM

How to use stepfun-ai/Step-3.5-Flash with vLLM:

Install from pip and serve model

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

Use Docker

docker model run hf.co/stepfun-ai/Step-3.5-Flash

SGLang

How to use stepfun-ai/Step-3.5-Flash 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 "stepfun-ai/Step-3.5-Flash" \
    --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": "stepfun-ai/Step-3.5-Flash",
		"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 "stepfun-ai/Step-3.5-Flash" \
        --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": "stepfun-ai/Step-3.5-Flash",
		"messages": [
			{
				"role": "user",
				"content": "What is the capital of France?"
			}
		]
	}'

Docker Model Runner
How to use stepfun-ai/Step-3.5-Flash with Docker Model Runner:
```
docker model run hf.co/stepfun-ai/Step-3.5-Flash
```

WinstonDeng commited on Feb 6

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50aa037

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@@ -22,8 +22,7 @@ library_name: transformers
 [![Paper](https://img.shields.io/badge/Paper-Arxiv-red)](https://github.com/stepfun-ai/Step-3.5-Flash/blob/main/step_3p5_flash_tech_report.pdf)
 [![License](https://img.shields.io/badge/License-Apache%202.0-green)]()
 [![Chat with the model on OpenRouter](https://img.shields.io/badge/Chat%20with%20the%20model-OpenRouter-5B3DF5?logo=chatbot&logoColor=white)](https://openrouter.ai/chat?models=stepfun/step-3.5-flash:free)
-**Quick chat in [Huggingface Space](https://huggingface.co/spaces/stepfun-ai/Step-3.5-Flash)**
 </div>

 [![Paper](https://img.shields.io/badge/Paper-Arxiv-red)](https://github.com/stepfun-ai/Step-3.5-Flash/blob/main/step_3p5_flash_tech_report.pdf)
 [![License](https://img.shields.io/badge/License-Apache%202.0-green)]()
 [![Chat with the model on OpenRouter](https://img.shields.io/badge/Chat%20with%20the%20model-OpenRouter-5B3DF5?logo=chatbot&logoColor=white)](https://openrouter.ai/chat?models=stepfun/step-3.5-flash:free)
+[![Chat with the model on HuggingfaceSpace](https://img.shields.io/badge/Chat%20with%20the%20model-HuggingfaceSpace-5B3DF5?logo=chatbot&logoColor=white)](https://huggingface.co/spaces/stepfun-ai/Step-3.5-Flash)
 </div>