tabpfn


Nametabpfn JSON
Version 2.1.0 PyPI version JSON
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home_pageNone
SummaryTabPFN: Foundation model for tabular data
upload_time2025-07-09 16:29:15
maintainerNone
docs_urlNone
authorNoah Hollmann, Samuel Müller, Lennart Purucker, Arjun Krishnakumar, Max Körfer, Shi Bin Hoo, Robin Tibor Schirrmeister, Frank Hutter, Eddie Bergman, Leo Grinsztajn
requires_python>=3.9
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            # TabPFN

[![PyPI version](https://badge.fury.io/py/tabpfn.svg)](https://badge.fury.io/py/tabpfn)
[![Downloads](https://pepy.tech/badge/tabpfn)](https://pepy.tech/project/tabpfn)
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[![Documentation](https://img.shields.io/badge/docs-priorlabs.ai-blue)](https://priorlabs.ai/docs)
[![colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/PriorLabs/TabPFN/blob/main/examples/notebooks/TabPFN_Demo_Local.ipynb)
[![Python Versions](https://img.shields.io/badge/python-3.9%20%7C%203.10%20%7C%203.11%20%7C%203.12%20%7C%203.13-blue)](https://pypi.org/project/tabpfn/)

<img src="https://github.com/PriorLabs/tabpfn-extensions/blob/main/tabpfn_summary.webp" width="80%" alt="TabPFN Summary">

⚠️ **Major Update: Version 2.0:** Complete codebase overhaul with new architecture and
features. Previous version available at [v1.0.0](../../tree/v1.0.0) and
`pip install tabpfn==0.1.11`.

📚 For detailed usage examples and best practices, check out [Interactive Colab Tutorial](https://colab.research.google.com/github/PriorLabs/TabPFN/blob/main/examples/notebooks/TabPFN_Demo_Local.ipynb)

## 🏁 Quick Start

TabPFN is a foundation model for tabular data that outperforms traditional methods while
being dramatically faster. This repository contains the core PyTorch implementation with
CUDA optimization.

> ⚡ **GPU Recommended**:
> For optimal performance, use a GPU (even older ones with ~8GB VRAM work well; 16GB needed for some large datasets).
> On CPU, only small datasets (≲1000 samples) are feasible.
> No GPU? Use our free hosted inference via [TabPFN Client](https://github.com/PriorLabs/tabpfn-client).

### Installation
Official installation (pip)
```bash
pip install tabpfn
```
OR installation from source
```bash
pip install "tabpfn @ git+https://github.com/PriorLabs/TabPFN.git"
```
OR local development installation
```bash

git clone https://github.com/PriorLabs/TabPFN.git
pip install -e "TabPFN[dev]"
```

### Basic Usage

#### Classification
```python
from sklearn.datasets import load_breast_cancer
from sklearn.metrics import accuracy_score, roc_auc_score
from sklearn.model_selection import train_test_split

from tabpfn import TabPFNClassifier

# Load data
X, y = load_breast_cancer(return_X_y=True)
X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.5, random_state=42)

# Initialize a classifier
clf = TabPFNClassifier()
clf.fit(X_train, y_train)

# Predict probabilities
prediction_probabilities = clf.predict_proba(X_test)
print("ROC AUC:", roc_auc_score(y_test, prediction_probabilities[:, 1]))

# Predict labels
predictions = clf.predict(X_test)
print("Accuracy", accuracy_score(y_test, predictions))
```

#### Regression
```python
from sklearn.datasets import fetch_openml
from sklearn.metrics import mean_squared_error, r2_score
from sklearn.model_selection import train_test_split

from tabpfn import TabPFNRegressor

# Load Boston Housing data
df = fetch_openml(data_id=531, as_frame=True)  # Boston Housing dataset
X = df.data
y = df.target.astype(float)  # Ensure target is float for regression

# Train-test split
X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.5, random_state=42)

# Initialize the regressor
regressor = TabPFNRegressor()
regressor.fit(X_train, y_train)

# Predict on the test set
predictions = regressor.predict(X_test)

# Evaluate the model
mse = mean_squared_error(y_test, predictions)
r2 = r2_score(y_test, predictions)

print("Mean Squared Error (MSE):", mse)
print("R² Score:", r2)
```

### Best Results

For optimal performance, use the `AutoTabPFNClassifier` or `AutoTabPFNRegressor` for post-hoc ensembling. These can be found in the [TabPFN Extensions](https://github.com/PriorLabs/tabpfn-extensions) repository. Post-hoc ensembling combines multiple TabPFN models into an ensemble.

**Steps for Best Results:**
1. Install the extensions:
   ```bash
   git clone https://github.com/priorlabs/tabpfn-extensions.git
   pip install -e tabpfn-extensions
   ```

2.
   ```python
   from tabpfn_extensions.post_hoc_ensembles.sklearn_interface import AutoTabPFNClassifier

   clf = AutoTabPFNClassifier(max_time=120, device="cuda") # 120 seconds tuning time
   clf.fit(X_train, y_train)
   predictions = clf.predict(X_test)
   ```

## 🌐 TabPFN Ecosystem

Choose the right TabPFN implementation for your needs:

- **[TabPFN Client](https://github.com/priorlabs/tabpfn-client)**
  Simple API client for using TabPFN via cloud-based inference.

- **[TabPFN Extensions](https://github.com/priorlabs/tabpfn-extensions)**
  A powerful companion repository packed with advanced utilities, integrations, and features - great place to contribute:

  - 🔍 **`interpretability`**: Gain insights with SHAP-based explanations, feature importance, and selection tools.
  - 🕵️‍♂️ **`unsupervised`**: Tools for outlier detection and synthetic tabular data generation.
  - 🧬 **`embeddings`**: Extract and use TabPFN’s internal learned embeddings for downstream tasks or analysis.
  - 🧠 **`many_class`**: Handle multi-class classification problems that exceed TabPFN's built-in class limit.
  - 🌲 **`rf_pfn`**: Combine TabPFN with traditional models like Random Forests for hybrid approaches.
  - ⚙️ **`hpo`**: Automated hyperparameter optimization tailored to TabPFN.
  - 🔁 **`post_hoc_ensembles`**: Boost performance by ensembling multiple TabPFN models post-training.

  ✨ To install:
  ```bash
  git clone https://github.com/priorlabs/tabpfn-extensions.git
  pip install -e tabpfn-extensions
  ```

- **[TabPFN (this repo)](https://github.com/priorlabs/tabpfn)**
  Core implementation for fast and local inference with PyTorch and CUDA support.

- **[TabPFN UX](https://ux.priorlabs.ai)**
  No-code graphical interface to explore TabPFN capabilities—ideal for business users and prototyping.

## 📜 License

Prior Labs License (Apache 2.0 with additional attribution requirement): [here](https://priorlabs.ai/tabpfn-license/)

## 🤝 Join Our Community

We're building the future of tabular machine learning and would love your involvement:

1. **Connect & Learn**:
   - Join our [Discord Community](https://discord.gg/VJRuU3bSxt)
   - Read our [Documentation](https://priorlabs.ai/docs)
   - Check out [GitHub Issues](https://github.com/priorlabs/tabpfn/issues)

2. **Contribute**:
   - Report bugs or request features
   - Submit pull requests
   - Share your research and use cases

3. **Stay Updated**: Star the repo and join Discord for the latest updates

## 📚 Citation

You can read our paper explaining TabPFN [here](https://doi.org/10.1038/s41586-024-08328-6).

```bibtex
@article{hollmann2025tabpfn,
 title={Accurate predictions on small data with a tabular foundation model},
 author={Hollmann, Noah and M{\"u}ller, Samuel and Purucker, Lennart and
         Krishnakumar, Arjun and K{\"o}rfer, Max and Hoo, Shi Bin and
         Schirrmeister, Robin Tibor and Hutter, Frank},
 journal={Nature},
 year={2025},
 month={01},
 day={09},
 doi={10.1038/s41586-024-08328-6},
 publisher={Springer Nature},
 url={https://www.nature.com/articles/s41586-024-08328-6},
}

@inproceedings{hollmann2023tabpfn,
  title={TabPFN: A transformer that solves small tabular classification problems in a second},
  author={Hollmann, Noah and M{\"u}ller, Samuel and Eggensperger, Katharina and Hutter, Frank},
  booktitle={International Conference on Learning Representations 2023},
  year={2023}
}
```



## ❓ FAQ

### **Usage & Compatibility**

**Q: What dataset sizes work best with TabPFN?**
A: TabPFN is optimized for **datasets up to 10,000 rows**. For larger datasets, consider using **Random Forest preprocessing** or other extensions. See our [Colab notebook](https://colab.research.google.com/drive/154SoIzNW1LHBWyrxNwmBqtFAr1uZRZ6a#scrollTo=OwaXfEIWlhC8) for strategies.

**Q: Why can't I use TabPFN with Python 3.8?**
A: TabPFN v2 requires **Python 3.9+** due to newer language features. Compatible versions: **3.9, 3.10, 3.11, 3.12, 3.13**.

### **Installation & Setup**

**Q: How do I use TabPFN without an internet connection?**

TabPFN automatically downloads model weights when first used. For offline usage:

**Using the Provided Download Script**

If you have the TabPFN repository, you can use the included script to download all models (including ensemble variants):

```bash
# After installing TabPFN
python scripts/download_all_models.py
```

This script will download the main classifier and regressor models, as well as all ensemble variant models to your system's default cache directory.

**Manual Download**

1. Download the model files manually from HuggingFace:
   - Classifier: [tabpfn-v2-classifier.ckpt](https://huggingface.co/Prior-Labs/TabPFN-v2-clf/resolve/main/tabpfn-v2-classifier.ckpt)
   - Regressor: [tabpfn-v2-regressor.ckpt](https://huggingface.co/Prior-Labs/TabPFN-v2-reg/resolve/main/tabpfn-v2-regressor.ckpt)

2. Place the file in one of these locations:
   - Specify directly: `TabPFNClassifier(model_path="/path/to/model.ckpt")`
   - Set environment variable: `os.environ["TABPFN_MODEL_CACHE_DIR"] = "/path/to/dir"`
   - Default OS cache directory:
     - Windows: `%APPDATA%\tabpfn\`
     - macOS: `~/Library/Caches/tabpfn/`
     - Linux: `~/.cache/tabpfn/`

**Q: I'm getting a `pickle` error when loading the model. What should I do?**
A: Try the following:
- Download the newest version of tabpfn `pip install tabpfn --upgrade`
- Ensure model files downloaded correctly (re-download if needed)

**Q: How do I save and load a trained TabPFN model?**
A: Use :func:`save_fitted_tabpfn_model` to persist a fitted estimator and reload
it later with :func:`load_fitted_tabpfn_model` (or the corresponding
``load_from_fit_state`` class methods).

```python
from tabpfn import TabPFNRegressor
from tabpfn.model.loading import (
    load_fitted_tabpfn_model,
    save_fitted_tabpfn_model,
)

# Train the regressor on GPU
reg = TabPFNRegressor(device="cuda")
reg.fit(X_train, y_train)
save_fitted_tabpfn_model(reg, "my_reg.tabpfn_fit")

# Later or on a CPU-only machine
reg_cpu = load_fitted_tabpfn_model("my_reg.tabpfn_fit", device="cpu")
```

To store just the foundation model weights (without a fitted estimator) use
``save_tabpfn_model(reg.model_, "my_tabpfn.ckpt")``. This merely saves a
checkpoint of the pre-trained weights so you can later create and fit a fresh
estimator. Reload the checkpoint with ``load_model_criterion_config``.

### **Performance & Limitations**

**Q: Can TabPFN handle missing values?**
A: **Yes!**

**Q: How can I improve TabPFN’s performance?**
A: Best practices:
- Use **AutoTabPFNClassifier** from [TabPFN Extensions](https://github.com/priorlabs/tabpfn-extensions) for post-hoc ensembling
- Feature engineering: Add domain-specific features to improve model performance
Not effective:
  - Adapt feature scaling
  - Convert categorical features to numerical values (e.g., one-hot encoding)

## 🛠️ Development

1. Setup environment:
```bash
python -m venv venv
source venv/bin/activate  # On Windows: venv\Scripts\activate
git clone https://github.com/PriorLabs/TabPFN.git
cd TabPFN
pip install -e ".[dev]"
pre-commit install
```

2. Before committing:
```bash
pre-commit run --all-files
```

3. Run tests:
```bash
pytest tests/
```

---

Built with ❤️ by [Prior Labs](https://priorlabs.ai) - Copyright (c) 2025 Prior Labs GmbH

            

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    "author": "Noah Hollmann, Samuel M\u00fcller, Lennart Purucker, Arjun Krishnakumar, Max K\u00f6rfer, Shi Bin Hoo, Robin Tibor Schirrmeister, Frank Hutter, Eddie Bergman, Leo Grinsztajn",
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    "description": "# TabPFN\n\n[![PyPI version](https://badge.fury.io/py/tabpfn.svg)](https://badge.fury.io/py/tabpfn)\n[![Downloads](https://pepy.tech/badge/tabpfn)](https://pepy.tech/project/tabpfn)\n[![Discord](https://img.shields.io/discord/1285598202732482621?color=7289da&label=Discord&logo=discord&logoColor=ffffff)](https://discord.com/channels/1285598202732482621/)\n[![Documentation](https://img.shields.io/badge/docs-priorlabs.ai-blue)](https://priorlabs.ai/docs)\n[![colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/PriorLabs/TabPFN/blob/main/examples/notebooks/TabPFN_Demo_Local.ipynb)\n[![Python Versions](https://img.shields.io/badge/python-3.9%20%7C%203.10%20%7C%203.11%20%7C%203.12%20%7C%203.13-blue)](https://pypi.org/project/tabpfn/)\n\n<img src=\"https://github.com/PriorLabs/tabpfn-extensions/blob/main/tabpfn_summary.webp\" width=\"80%\" alt=\"TabPFN Summary\">\n\n\u26a0\ufe0f **Major Update: Version 2.0:** Complete codebase overhaul with new architecture and\nfeatures. Previous version available at [v1.0.0](../../tree/v1.0.0) and\n`pip install tabpfn==0.1.11`.\n\n\ud83d\udcda For detailed usage examples and best practices, check out [Interactive Colab Tutorial](https://colab.research.google.com/github/PriorLabs/TabPFN/blob/main/examples/notebooks/TabPFN_Demo_Local.ipynb)\n\n## \ud83c\udfc1 Quick Start\n\nTabPFN is a foundation model for tabular data that outperforms traditional methods while\nbeing dramatically faster. This repository contains the core PyTorch implementation with\nCUDA optimization.\n\n> \u26a1 **GPU Recommended**:\n> For optimal performance, use a GPU (even older ones with ~8GB VRAM work well; 16GB needed for some large datasets).\n> On CPU, only small datasets (\u22721000 samples) are feasible.\n> No GPU? Use our free hosted inference via [TabPFN Client](https://github.com/PriorLabs/tabpfn-client).\n\n### Installation\nOfficial installation (pip)\n```bash\npip install tabpfn\n```\nOR installation from source\n```bash\npip install \"tabpfn @ git+https://github.com/PriorLabs/TabPFN.git\"\n```\nOR local development installation\n```bash\n\ngit clone https://github.com/PriorLabs/TabPFN.git\npip install -e \"TabPFN[dev]\"\n```\n\n### Basic Usage\n\n#### Classification\n```python\nfrom sklearn.datasets import load_breast_cancer\nfrom sklearn.metrics import accuracy_score, roc_auc_score\nfrom sklearn.model_selection import train_test_split\n\nfrom tabpfn import TabPFNClassifier\n\n# Load data\nX, y = load_breast_cancer(return_X_y=True)\nX_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.5, random_state=42)\n\n# Initialize a classifier\nclf = TabPFNClassifier()\nclf.fit(X_train, y_train)\n\n# Predict probabilities\nprediction_probabilities = clf.predict_proba(X_test)\nprint(\"ROC AUC:\", roc_auc_score(y_test, prediction_probabilities[:, 1]))\n\n# Predict labels\npredictions = clf.predict(X_test)\nprint(\"Accuracy\", accuracy_score(y_test, predictions))\n```\n\n#### Regression\n```python\nfrom sklearn.datasets import fetch_openml\nfrom sklearn.metrics import mean_squared_error, r2_score\nfrom sklearn.model_selection import train_test_split\n\nfrom tabpfn import TabPFNRegressor\n\n# Load Boston Housing data\ndf = fetch_openml(data_id=531, as_frame=True)  # Boston Housing dataset\nX = df.data\ny = df.target.astype(float)  # Ensure target is float for regression\n\n# Train-test split\nX_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.5, random_state=42)\n\n# Initialize the regressor\nregressor = TabPFNRegressor()\nregressor.fit(X_train, y_train)\n\n# Predict on the test set\npredictions = regressor.predict(X_test)\n\n# Evaluate the model\nmse = mean_squared_error(y_test, predictions)\nr2 = r2_score(y_test, predictions)\n\nprint(\"Mean Squared Error (MSE):\", mse)\nprint(\"R\u00b2 Score:\", r2)\n```\n\n### Best Results\n\nFor optimal performance, use the `AutoTabPFNClassifier` or `AutoTabPFNRegressor` for post-hoc ensembling. These can be found in the [TabPFN Extensions](https://github.com/PriorLabs/tabpfn-extensions) repository. Post-hoc ensembling combines multiple TabPFN models into an ensemble.\n\n**Steps for Best Results:**\n1. Install the extensions:\n   ```bash\n   git clone https://github.com/priorlabs/tabpfn-extensions.git\n   pip install -e tabpfn-extensions\n   ```\n\n2.\n   ```python\n   from tabpfn_extensions.post_hoc_ensembles.sklearn_interface import AutoTabPFNClassifier\n\n   clf = AutoTabPFNClassifier(max_time=120, device=\"cuda\") # 120 seconds tuning time\n   clf.fit(X_train, y_train)\n   predictions = clf.predict(X_test)\n   ```\n\n## \ud83c\udf10 TabPFN Ecosystem\n\nChoose the right TabPFN implementation for your needs:\n\n- **[TabPFN Client](https://github.com/priorlabs/tabpfn-client)**\n  Simple API client for using TabPFN via cloud-based inference.\n\n- **[TabPFN Extensions](https://github.com/priorlabs/tabpfn-extensions)**\n  A powerful companion repository packed with advanced utilities, integrations, and features - great place to contribute:\n\n  - \ud83d\udd0d **`interpretability`**: Gain insights with SHAP-based explanations, feature importance, and selection tools.\n  - \ud83d\udd75\ufe0f\u200d\u2642\ufe0f **`unsupervised`**: Tools for outlier detection and synthetic tabular data generation.\n  - \ud83e\uddec **`embeddings`**: Extract and use TabPFN\u2019s internal learned embeddings for downstream tasks or analysis.\n  - \ud83e\udde0 **`many_class`**: Handle multi-class classification problems that exceed TabPFN's built-in class limit.\n  - \ud83c\udf32 **`rf_pfn`**: Combine TabPFN with traditional models like Random Forests for hybrid approaches.\n  - \u2699\ufe0f **`hpo`**: Automated hyperparameter optimization tailored to TabPFN.\n  - \ud83d\udd01 **`post_hoc_ensembles`**: Boost performance by ensembling multiple TabPFN models post-training.\n\n  \u2728 To install:\n  ```bash\n  git clone https://github.com/priorlabs/tabpfn-extensions.git\n  pip install -e tabpfn-extensions\n  ```\n\n- **[TabPFN (this repo)](https://github.com/priorlabs/tabpfn)**\n  Core implementation for fast and local inference with PyTorch and CUDA support.\n\n- **[TabPFN UX](https://ux.priorlabs.ai)**\n  No-code graphical interface to explore TabPFN capabilities\u2014ideal for business users and prototyping.\n\n## \ud83d\udcdc License\n\nPrior Labs License (Apache 2.0 with additional attribution requirement): [here](https://priorlabs.ai/tabpfn-license/)\n\n## \ud83e\udd1d Join Our Community\n\nWe're building the future of tabular machine learning and would love your involvement:\n\n1. **Connect & Learn**:\n   - Join our [Discord Community](https://discord.gg/VJRuU3bSxt)\n   - Read our [Documentation](https://priorlabs.ai/docs)\n   - Check out [GitHub Issues](https://github.com/priorlabs/tabpfn/issues)\n\n2. **Contribute**:\n   - Report bugs or request features\n   - Submit pull requests\n   - Share your research and use cases\n\n3. **Stay Updated**: Star the repo and join Discord for the latest updates\n\n## \ud83d\udcda Citation\n\nYou can read our paper explaining TabPFN [here](https://doi.org/10.1038/s41586-024-08328-6).\n\n```bibtex\n@article{hollmann2025tabpfn,\n title={Accurate predictions on small data with a tabular foundation model},\n author={Hollmann, Noah and M{\\\"u}ller, Samuel and Purucker, Lennart and\n         Krishnakumar, Arjun and K{\\\"o}rfer, Max and Hoo, Shi Bin and\n         Schirrmeister, Robin Tibor and Hutter, Frank},\n journal={Nature},\n year={2025},\n month={01},\n day={09},\n doi={10.1038/s41586-024-08328-6},\n publisher={Springer Nature},\n url={https://www.nature.com/articles/s41586-024-08328-6},\n}\n\n@inproceedings{hollmann2023tabpfn,\n  title={TabPFN: A transformer that solves small tabular classification problems in a second},\n  author={Hollmann, Noah and M{\\\"u}ller, Samuel and Eggensperger, Katharina and Hutter, Frank},\n  booktitle={International Conference on Learning Representations 2023},\n  year={2023}\n}\n```\n\n\n\n## \u2753 FAQ\n\n### **Usage & Compatibility**\n\n**Q: What dataset sizes work best with TabPFN?**\nA: TabPFN is optimized for **datasets up to 10,000 rows**. For larger datasets, consider using **Random Forest preprocessing** or other extensions. See our [Colab notebook](https://colab.research.google.com/drive/154SoIzNW1LHBWyrxNwmBqtFAr1uZRZ6a#scrollTo=OwaXfEIWlhC8) for strategies.\n\n**Q: Why can't I use TabPFN with Python 3.8?**\nA: TabPFN v2 requires **Python 3.9+** due to newer language features. Compatible versions: **3.9, 3.10, 3.11, 3.12, 3.13**.\n\n### **Installation & Setup**\n\n**Q: How do I use TabPFN without an internet connection?**\n\nTabPFN automatically downloads model weights when first used. For offline usage:\n\n**Using the Provided Download Script**\n\nIf you have the TabPFN repository, you can use the included script to download all models (including ensemble variants):\n\n```bash\n# After installing TabPFN\npython scripts/download_all_models.py\n```\n\nThis script will download the main classifier and regressor models, as well as all ensemble variant models to your system's default cache directory.\n\n**Manual Download**\n\n1. Download the model files manually from HuggingFace:\n   - Classifier: [tabpfn-v2-classifier.ckpt](https://huggingface.co/Prior-Labs/TabPFN-v2-clf/resolve/main/tabpfn-v2-classifier.ckpt)\n   - Regressor: [tabpfn-v2-regressor.ckpt](https://huggingface.co/Prior-Labs/TabPFN-v2-reg/resolve/main/tabpfn-v2-regressor.ckpt)\n\n2. Place the file in one of these locations:\n   - Specify directly: `TabPFNClassifier(model_path=\"/path/to/model.ckpt\")`\n   - Set environment variable: `os.environ[\"TABPFN_MODEL_CACHE_DIR\"] = \"/path/to/dir\"`\n   - Default OS cache directory:\n     - Windows: `%APPDATA%\\tabpfn\\`\n     - macOS: `~/Library/Caches/tabpfn/`\n     - Linux: `~/.cache/tabpfn/`\n\n**Q: I'm getting a `pickle` error when loading the model. What should I do?**\nA: Try the following:\n- Download the newest version of tabpfn `pip install tabpfn --upgrade`\n- Ensure model files downloaded correctly (re-download if needed)\n\n**Q: How do I save and load a trained TabPFN model?**\nA: Use :func:`save_fitted_tabpfn_model` to persist a fitted estimator and reload\nit later with :func:`load_fitted_tabpfn_model` (or the corresponding\n``load_from_fit_state`` class methods).\n\n```python\nfrom tabpfn import TabPFNRegressor\nfrom tabpfn.model.loading import (\n    load_fitted_tabpfn_model,\n    save_fitted_tabpfn_model,\n)\n\n# Train the regressor on GPU\nreg = TabPFNRegressor(device=\"cuda\")\nreg.fit(X_train, y_train)\nsave_fitted_tabpfn_model(reg, \"my_reg.tabpfn_fit\")\n\n# Later or on a CPU-only machine\nreg_cpu = load_fitted_tabpfn_model(\"my_reg.tabpfn_fit\", device=\"cpu\")\n```\n\nTo store just the foundation model weights (without a fitted estimator) use\n``save_tabpfn_model(reg.model_, \"my_tabpfn.ckpt\")``. This merely saves a\ncheckpoint of the pre-trained weights so you can later create and fit a fresh\nestimator. Reload the checkpoint with ``load_model_criterion_config``.\n\n### **Performance & Limitations**\n\n**Q: Can TabPFN handle missing values?**\nA: **Yes!**\n\n**Q: How can I improve TabPFN\u2019s performance?**\nA: Best practices:\n- Use **AutoTabPFNClassifier** from [TabPFN Extensions](https://github.com/priorlabs/tabpfn-extensions) for post-hoc ensembling\n- Feature engineering: Add domain-specific features to improve model performance\nNot effective:\n  - Adapt feature scaling\n  - Convert categorical features to numerical values (e.g., one-hot encoding)\n\n## \ud83d\udee0\ufe0f Development\n\n1. Setup environment:\n```bash\npython -m venv venv\nsource venv/bin/activate  # On Windows: venv\\Scripts\\activate\ngit clone https://github.com/PriorLabs/TabPFN.git\ncd TabPFN\npip install -e \".[dev]\"\npre-commit install\n```\n\n2. Before committing:\n```bash\npre-commit run --all-files\n```\n\n3. Run tests:\n```bash\npytest tests/\n```\n\n---\n\nBuilt with \u2764\ufe0f by [Prior Labs](https://priorlabs.ai) - Copyright (c) 2025 Prior Labs GmbH\n",
    "bugtrack_url": null,
    "license": "\n                                      Prior Labs License\n                                   Version 1.1, May 2025\n                               http://priorlabs.ai/tabpfn-license\n        \n           This license is a derivative of the Apache 2.0 license\n           (http://www.apache.org/licenses/) with a single modification:\n           The added Paragraph 10 introduces an enhanced attribution requirement\n           inspired by the Llama 3 license.\n        \n           TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION\n        \n           1. 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