Skip to content

License

ChimeraLM is released under the Apache License 2.0.

Apache License 2.0

Copyright 2025 Yangyang Li, Qingxiang Guo, Rendong Yang

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

Summary

The Apache License 2.0 is a permissive license that allows you to:

✅ Use the software for any purpose ✅ Modify the software ✅ Distribute original or modified versions ✅ Sublicense the software ✅ Use the software commercially

With the following conditions:

  • License and copyright notice: Include the license and copyright notice with the software
  • State changes: Indicate significant changes made to the software
  • Disclaimer of warranty: The software is provided "as is" without warranties

Full License Text

The complete Apache License 2.0 text is available in the LICENSE file in the repository.

Third-Party Licenses

ChimeraLM uses several third-party libraries, each with their own licenses:

Python Dependencies

  • PyTorch: BSD-style license
  • PyTorch Lightning: Apache License 2.0
  • Transformers: Apache License 2.0
  • Hydra: MIT License
  • pysam: MIT License
  • Typer: MIT License

Rust Dependencies

  • needletail: MIT License
  • noodles: MIT License
  • PyO3: Apache License 2.0 or MIT

All dependencies are compatible with the Apache License 2.0.

Model License

The pretrained ChimeraLM model is released under the Apache License 2.0, consistent with the codebase.

Contributing

By contributing to ChimeraLM, you agree that your contributions will be licensed under the Apache License 2.0.

Questions?

For licensing questions, contact:

Disclaimer

This documentation provides a summary of the Apache License 2.0 for informational purposes only. It is not legal advice. For full legal terms, refer to the official license text.