🎉 If you like our project, please give us a star ⭐ on GitHub for the latest update.

Beginner-friendly learning resources (continuously updated): [🎬 Video Tutorials] [📚 Written Tutorials]

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• [2025-12-19] 🎉 Our DataFlow technical report is now available!
  We welcome you to read and cite our work if you find it helpful.
  👉 Read the full report on arXiv: https://arxiv.org/abs/2512.16676

• [2025-11-20] Introducing New Data Agents for DataFlow! 🤖 You can try them out now and follow the tutorial on Bilibili for a quick start.

• [2025-06-28] 🎉 We’re excited to announce that DataFlow, our Data-centric AI system, is now released! Stay tuned for future updates.

DataFlow is a data preparation and training system designed to parse, generate, process, and evaluate high-quality data from noisy sources (PDF, plain-text, low-quality QA), thereby improving the performance of large language models (LLMs) in specific domains through targeted training (Pre-training, Supervised Fine-tuning, RL training) or RAG using knowledge base cleaning. DataFlow has been empirically validated to improve domain-oriented LLMs' performance in fields such as healthcare, finance, and law.

Specifically, we are constructing diverse operators leveraging rule-based methods, deep learning models, LLMs, and LLM APIs. These operators are systematically integrated into distinct pipelines, collectively forming the comprehensive DataFlow system. Additionally, we develop an intelligent DataFlow-agent capable of dynamically assembling new pipelines by recombining existing operators on demand.

DataFlow adopts a modular operator design philosophy, building flexible data processing pipelines by combining different types of operators. As the basic unit of data processing, an operator can receive structured data input (such as in json/jsonl/csv format) and, after intelligent processing, output high-quality data results. For a detailed guide on using operators, please refer to the Operator Documentation.

In the DataFlow framework, operators are divided into three core categories based on their functional characteristics:

Current Pipelines in Dataflow are as follows:

• 📝 Text Pipeline: Mine question-answer pairs from large-scale plain-text data (mostly crawed from InterNet) for use in SFT and RL training.
  • 
  • [HuggingFace🤗 demo input & output for Text Pipeline]
• 🧠 Reasoning Pipeline: Enhances existing question–answer pairs with (1) extended chain-of-thought, (2) category classification, and (3) difficulty estimation.
  • 
  • [HuggingFace🤗 demo input & output for Reasoning Pipeline]
• 🗃️ Text2SQL Pipeline: Translates natural language questions into SQL queries, supplemented with explanations, chain-of-thought reasoning, and contextual schema information.
  • 
  • [HuggingFace🤗 demo input & output for Text2SQL Pipeline]
• 📚 Knowlege Base Cleaning Pipeline: Extract and structure knowledge from unorganized sources like tables, PDFs, and Word documents into usable entries for downstream RAG or QA pair generation.
  • 
• 🤖 Agentic RAG Pipeline: Identify and extract QA pairs from existing QA datasets or knowledge bases that require external knowledge to answer, for use in downstream training of Agnetic RAG tasks.
  • 

In this framework, operators are categorized into Fundamental Operators, Generic Operators, Domain-Specific Operators, and Evaluation Operators, etc., supporting data processing and evaluation functionalities. Please refer to the documentation for details.

• DataFlow Agent: An intelligent assistant that performs data analysis, writes custom operators, and automatically orchestrates them into pipelines based on specific task objectives.

  • 
  • [HuggingFace🤗 demo input & output for DataFlow Agent]

Please use the following commands for environment setup and installation👇

conda create -n dataflow python=3.10 
conda activate dataflow

pip install open-dataflow

If you want to use your own GPU for local inference, please use:

pip install open-dataflow[vllm]

DataFlow supports Python>=3.10 environments

After installation, you can use the following command to check if dataflow has been installed correctly:

dataflow -v

If installed correctly, you should see:

open-dataflow codebase version: 1.0.0
        Checking for updates...
        Local version:  1.0.0
        PyPI newest version:  1.0.0
You are using the latest version: 1.0.0.

We also provide a Dockerfile for easy deployment and a pre-built Docker image for immediate use.

You can directly pull and use our pre-built Docker image:

# Pull the pre-built image
docker pull molyheci/dataflow:cu124

# Run the container with GPU support
docker run --gpus all -it molyheci/dataflow:cu124

# Inside the container, verify installation
dataflow -v

Alternatively, you can build the Docker image from the provided Dockerfile:

# Clone the repository (HTTPS)
git clone https://github.com/OpenDCAI/DataFlow.git
# Or use SSH
# git clone git@github.com:OpenDCAI/DataFlow.git

cd DataFlow

# Build the Docker image
docker build -t dataflow:custom .

# Run the container
docker run --gpus all -it dataflow:custom

# Inside the container, verify installation
dataflow -v

Note: The Docker image includes CUDA 12.4.1 support and comes with vLLM pre-installed for GPU acceleration. Make sure you have NVIDIA Container Toolkit installed to use GPU features.

For detailed usage instructions and getting started guide, please visit our Documentation.

For Detailed Experiments setting, please visit our DataFlow Technical Report.

From the SlimPajama-627B corpus, we extract a 100B-token subset and apply multiple DataFlow text-pretraining filters. We train a Qwen2.5-0.5B model from scratch for 30B tokens using the Megatron-DeepSpeed framework, the results are as follows:

To study small-scale SFT data quality, we fine-tune the Qwen2.5-7B base model using LLaMA-Factory on WizardLM and Alpaca datasets.
For each dataset, we compared a randomly sampled set of 5K instances against a set of 5K instances filtered by DataFlow's SFT pipeline. Additionally, we synthesize a 15k-size dataset, DataFlow-SFT-15K, using DataFlow’s Condor Generator and Condor Refiner pipeline, followed by DataFlow’s SFT filtering pipeline (excluding the Instagram filter). Benchmarks include comprehensive Math, Code, and Knowledge evaluation suites.

We synthesize DataFlow-Chat-15K using DataFlow's conversation-generation pipeline and fine-tune Qwen2.5-7B-Base on it. Baselines include ShareGPT-15K, UltraChat-15K, and their full (non-truncated) versions. We evaluate on domain-specific tasks (TopDial, Light) and general benchmarks (MMLU, AlpacaEval, Arena-Hard).

We adopt the NuminaMath dataset as a high-quality seed dataset. We compare three training sources: (1) a random 10K subset from Open-R1, (2) a random 10K subset from Synthetic-1, and (3) our 10K synthesized DataFlow-Reasoning-10K dataset constructed using DataFlow.

We randomly sample 20k instances from the Ling-Coder-SFT corpus and process them through the DataFlow Code Pipeline. This yields three curated code instruction datasets of different scales, DataFlow-Code-1K, DataFlow-Code-5K, and DataFlow-Code-10K, each designed to provide high-quality, pipeline-refined supervision signals for code generation tasks.

We compare our synthesized datasets against Code-Alpaca-1k and Self-OSS-Instruct-SC2-Exec-Filter-1k.

Our team has published the following papers that form core components of the DataFlow system:

Contributing Institutions:

We are honored to have received first-place awards in two major international AI competitions, recognizing the excellence and robustness of DataFlow and its reasoning capabilities:

ICML 2025 Automated Math Reasoning Challenge — First Place Winner

BAAI Language & Intelligence Challenge 2025 — First Prize

We sincerely thank MinerU for their outstanding work, whose powerful PDF/document text extraction capabilities provided essential support for our data loading process.
We also thank LLaMA-Factory for offering an efficient and user-friendly framework for large model fine-tuning, which greatly facilitated rapid iteration in our training and experimentation workflows.
Our gratitude extends to all contributors in the open-source community—their efforts collectively drive the development of DataFlow.

Join the DataFlow open-source community to ask questions, share ideas, and collaborate with other developers!

• 📮 GitHub Issues: Report bugs or suggest features

• 🔧 GitHub Pull Requests: Contribute code improvements

• 💬 Join our community groups to connect with us and other contributors!

If you use DataFlow in your research, feel free to give us a cite.

@article{liang2025dataflow,
  title={DataFlow: An LLM-Driven Framework for Unified Data Preparation and Workflow Automation in the Era of Data-Centric AI},
  author={Liang, Hao and Ma, Xiaochen and Liu, Zhou and Wong, Zhen Hao and Zhao, Zhengyang and Meng, Zimo and He, Runming and Shen, Chengyu and Cai, Qifeng and Han, Zhaoyang and others},
  journal={arXiv preprint arXiv:2512.16676},
  year={2025}
}