# Third-Party Licenses & Attributions

emu is a proprietary product of CloudKites Pty Ltd (see `LICENSE`). It bundles or
downloads the third-party AI models and software components listed below, each
used under its own license. The notices in this file are provided to comply with
those licenses and are part of the emu End-User License Agreement.

emu does **not** modify the third-party model weights' architectures; the models
are run for inference and, where noted, quantized for on-device efficiency. Where
a license requires that modifications be indicated (e.g. CC-BY-4.0), quantization
and format conversion to emu's bundle format are the only changes made.

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## AI models

| Model | Role in emu | Provider | License |
|---|---|---|---|
| **Gemma 4 12B** (instruction-tuned) | Chat (text) | Google DeepMind | Gemma Terms of Use |
| **Gemma 4 E4B** (instruction-tuned) | Chat + multimodal (text · image · audio) | Google DeepMind | Gemma Terms of Use |
| **Qwen 3.5 4B** | Chat (text) | Alibaba Cloud (Qwen) | Apache License 2.0 |
| **Qwen 3.5 9B** | Chat (text) | Alibaba Cloud (Qwen) | Apache License 2.0 |
| **Qwen3-ASR 0.6B** | Speech-to-text | Alibaba Cloud (Qwen) | Apache License 2.0 |
| **Qwen3-TTS 12Hz 0.6B** | Text-to-speech (multilingual) | Alibaba Cloud (Qwen) | Apache License 2.0 |
| **gwen-tts 0.6B** (Vietnamese voice cloning; fine-tune of Qwen3-TTS) | Text-to-speech | G-Group AI Lab | MIT License |
| **Pocket TTS** | Text-to-speech (fast English) | Kyutai | CC-BY-4.0 |
| **VieNeu-TTS v3-Turbo** (built on MOSS-TTS-Nano + MOSS-Audio-Tokenizer) | Text-to-speech (Vietnamese · English) | pnnbao-ump; OpenMOSS Team | Apache License 2.0 |
| **PP-OCRv6** (detection + recognition) | Document OCR | PaddlePaddle (PaddleOCR) | Apache License 2.0 |

### Attribution notes

- **Gemma models** are provided by Google under and subject to the **Gemma Terms
  of Use** (ai.google.dev/gemma/terms) and the **Gemma Prohibited Use Policy**.
  "Gemma is provided under and subject to the Gemma Terms of Use." Your use of the
  Gemma models in emu is subject to those terms and that policy.
- **Qwen** models (Qwen 3.5, Qwen3-ASR, Qwen3-TTS) © Alibaba Cloud, licensed under
  the Apache License 2.0.
- **gwen-tts** © G-Group AI Lab, MIT License; it is a fine-tune of Qwen3-TTS
  (Apache-2.0).
- **Pocket TTS** © Kyutai, licensed under CC-BY-4.0 — attribution to Kyutai is
  given here; weights are quantized/format-converted for on-device use.
- **VieNeu-TTS v3-Turbo** © pnnbao-ump, Apache-2.0; based on **MOSS-TTS-Nano** and
  **MOSS-Audio-Tokenizer** © the OpenMOSS Team (Apache-2.0).
- **PP-OCRv6** © PaddlePaddle authors, Apache License 2.0.

Each model is redistributed/downloaded as quantized weights within emu's
self-contained bundle format and is used for on-device inference only.

---

## Software components

| Component | Use | License |
|---|---|---|
| **Qt 6** | Desktop UI framework (dynamically linked) | LGPL-3.0 (or commercial Qt license) |
| Qt 6 native binding layer (derived from **MIQT**, © mappu and contributors) | UI bindings | MIT License |
| **SQLite** | Local chat-history / settings storage | Public Domain |
| **FFmpeg** | Microphone / audio device capture | LGPL-2.1+ |
| **stb_image** | Image decoding | Public Domain / MIT |
| **NVIDIA CUDA Toolkit & cuDNN** (GPU builds only) | GPU acceleration runtime | NVIDIA Software License Agreement |

Qt 6 is used under the LGPL-3.0: it is dynamically linked, and the user may
replace the Qt runtime libraries. The NVIDIA CUDA/cuDNN runtimes are redistributed
in GPU builds under the NVIDIA Software License Agreement.

---

## Full license texts

The complete text of each referenced license — Apache License 2.0, the MIT
License, Creative Commons Attribution 4.0 International (CC-BY-4.0), the Gemma
Terms of Use and Prohibited Use Policy, LGPL-3.0 / LGPL-2.1, and the NVIDIA
Software License Agreement — accompanies the corresponding component and is
available from its provider. Copies are included with the distribution where
required by the applicable license.

© 2026 CloudKites Pty Ltd. This attribution file is provided to satisfy the
notice requirements of the licenses above and does not grant any rights in emu or
Numbat themselves, which remain proprietary (see `LICENSE`).