Instructions to use khazarai/Math-RL with libraries, inference providers, notebooks, and local apps. Follow these links to get started.

Libraries

How to use khazarai/Math-RL with Transformers:

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

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

# Load model directly
from transformers import AutoTokenizer, AutoModelForCausalLM

tokenizer = AutoTokenizer.from_pretrained("khazarai/Math-RL")
model = AutoModelForCausalLM.from_pretrained("khazarai/Math-RL", 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 khazarai/Math-RL with vLLM:

Install from pip and serve model

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

Use Docker

docker model run hf.co/khazarai/Math-RL

SGLang

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

Unsloth Studio

How to use khazarai/Math-RL with Unsloth Studio:

Install Unsloth Studio (macOS, Linux, WSL)

curl -fsSL https://unsloth.ai/install.sh | sh
# Run unsloth studio
unsloth studio -H 0.0.0.0 -p 8888
# Then open http://localhost:8888 in your browser
# Search for khazarai/Math-RL to start chatting

Install Unsloth Studio (Windows)

irm https://unsloth.ai/install.ps1 | iex
# Run unsloth studio
unsloth studio -H 0.0.0.0 -p 8888
# Then open http://localhost:8888 in your browser
# Search for khazarai/Math-RL to start chatting

Using HuggingFace Spaces for Unsloth

# No setup required
# Open https://huggingface.co/spaces/unsloth/studio in your browser
# Search for khazarai/Math-RL to start chatting

Load model with FastModel

pip install unsloth
from unsloth import FastModel
model, tokenizer = FastModel.from_pretrained(
    model_name="khazarai/Math-RL",
    max_seq_length=2048,
)

Docker Model Runner
How to use khazarai/Math-RL with Docker Model Runner:
```
docker model run hf.co/khazarai/Math-RL
```

Math-RL / README.md

Rustamshry

Update README.md

40df86c verified 5 months ago

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metadata

base_model: unsloth/Qwen2.5-0.5B-Instruct
library_name: transformers
license: apache-2.0
datasets:
  - HoangHa/pensez-grpo
language:
  - en
pipeline_tag: text-generation
tags:
  - math
  - trl
  - unsloth
  - grpo
  - transformers

Model Card for Math-RL

Model Details

This model is a fine-tuned version of Qwen2.5-0.5B-Instruct, optimized with Group Relative Policy Optimization (GRPO) on a curated math dataset of 700 problems. The fine-tuning process aims to enhance the model’s step-by-step reasoning ability in mathematical problem solving, improving its performance on structured reasoning tasks.

Model Description

Language(s) (NLP): English
License: MIT
Finetuned from model: Qwen2.5-0.5B-Instruct
Fine-tuning Method: GRPO with LoRa
Domain: Mathematics (problem-solving, reasoning)
Dataset Size: ~700 examples

Uses

Direct Use

The model is intended for:

Educational purposes: assisting students with math problems
Research on small-scale RLHF-style fine-tuning (GRPO)
Experiments in reasoning with small instruction-tuned models
Serving as a lightweight math reasoning assistant in constrained environments

Bias, Risks, and Limitations

Small Dataset: Fine-tuned only on 700 math problems, so generalization is limited.
Reasoning Errors: May produce incorrect or hallucinated answers. Always verify results.
Not a Math Oracle: Should not be used in high-stakes scenarios (e.g., exams, grading, critical calculations).
Limited Scope: Performance is strongest on problems similar to the fine-tuning dataset; outside domains may degrade.
Language: While the base model supports multiple languages, math-specific fine-tuning was primarily English-based.

How to Get Started with the Model

Use the code below to get started with the model.


from transformers import AutoTokenizer, AutoModelForCausalLM

tokenizer = AutoTokenizer.from_pretrained("khazarai/Math-RL")
model = AutoModelForCausalLM.from_pretrained(
    "khazarai/Math-RL",
    device_map={"": 0}
)

question = """
Translate the graph of the function $y=\sin 2x$ along the $x$-axis to the left by $\dfrac{\pi }{6}$ units, and stretch the ordinate to twice its original length (the abscissa remains unchanged) to obtain the graph of the function $y=f(x)$. If the minimum value of the function $y=f(x)+a$ on the interval $\left[ 0,\dfrac{\pi }{2} \right]$ is $\sqrt{3}$, then $a=\boxed{\_\_\_\_\_}$.
"""

system = """
Respond in the following format:
<reasoning>
...
</reasoning>
<answer>
...
</answer>
"""

messages = [
    {"role" : "system", "content" : system},
    {"role" : "user",   "content" : question}
]
text = tokenizer.apply_chat_template(
    messages,
    tokenize = False,
)

from transformers import TextStreamer
_ = model.generate(
    **tokenizer(text, return_tensors = "pt").to("cuda"),
    max_new_tokens = 2048,
    streamer = TextStreamer(tokenizer, skip_prompt = True),
)