---
title: "Model licenses"
description: "Every Noema model is an open-weight release, not open source. Where the terms for each one live."
version: "Noema 1.5 · Noema 2B"
applies_to: "Model weights on Hugging Face"
reviewed: "2026-10-23"
canonical: "https://noemaai.com/docs/model-licenses"
---

# Model licenses

Every Noema model is an open-weight release, not open source, and where each set of terms lives.

> Open weights are not open source. Read a model's card before you redistribute it or build it into a product.

## License by model

| Model | Release | Open source | Terms |
| --- | --- | --- | --- |
| [Noema 1.5 4B Deep](https://noemaai.com/models/noema-1-5-4b#deep) | Open weights | No | [Model card](https://huggingface.co/NoemaAI-labs/Noema-1.5-4B-Deep) |
| [Noema 1.5 4B Fast](https://noemaai.com/models/noema-1-5-4b#fast) | Open weights | No | [Model card](https://huggingface.co/NoemaAI-labs/Noema-1.5-4B-Fast) |
| [Noema 1.5 2B](https://noemaai.com/models/noema-1-5-2b) | Open weights | No | [Model card](https://huggingface.co/NoemaAI-labs/Noema-1.5-2B) |
| [Noema 2B](https://noemaai.com/models/noema-2b) | Open weights | No | [Model card](https://huggingface.co/NoemaAI-labs/Noema-2B) |

## Open weights

Every Noema model, including Noema 1.5 4B (Deep and Fast), Noema 1.5 2B and the deprecated Noema 2B, is an open-weight release. The weights are publicly downloadable, but no open-source license is granted with these repositories.

Noema 1.5 4B is derived from Qwen3.5-4B, which the Qwen team released under the Apache License 2.0. The Noema 1.5 4B repositories include a copy of that license as `LICENSE-Qwen3.5`.

If you need terms for a use the model card does not cover, email clientcare@noemaai.com.

## Noema Overfit packages

The [Noema Overfit repository](https://huggingface.co/NoemaAI-labs/Noema-Overfit) repackages third-party mixture-of-experts models for paged inference. Each package keeps the license of its upstream model, and the repository lists them.

## Software

[Noema Atlas](https://noemaai.com/developers/atlas) is open source under the Apache License 2.0. Its source is on [GitHub](https://github.com/noemaai-labs/noema-atlas).

## Related documentation
- [Noema models](https://noemaai.com/docs/models)
- [Run Noema models](https://noemaai.com/docs/run-noema-models)