README.md

---
license: other
license_name: stabilityai-ai-community
license_link: https://huggingface.co/stabilityai/sdxl-turbo/blob/main/LICENSE.md
tags:
  - stable-diffusion-xl
  - sdxl-turbo
  - qualcomm
  - hexagon
  - qnn
  - npu
  - text-to-image
  - tokforge
library_name: qnn
pipeline_tag: text-to-image
inference: false
---

# TokForge — SDXL-Turbo (Qualcomm Hexagon NPU)

**SDXL-Turbo** image generation for the **Qualcomm Hexagon NPU (HTP)**, packaged for **on-device**
image generation in the **TokForge** Android app (`dev.tokforge`). This is the higher-quality
**1024×1024** tier alongside the SD1.5 NPU bundle.

The model is quantized to **W8A16** (8-bit weights, 16-bit activations) and compiled to **QNN HTP
context binaries** that run on the phone's Hexagon DSP. The pipeline uses **fp16 text encoders** and a
**TAESDXL** tiny-VAE decoder, and is **guidance-free** (few-step distilled, one UNet pass per step).

## Based on

[`stabilityai/sdxl-turbo`](https://huggingface.co/stabilityai/sdxl-turbo).

## Format

**QNN HTP context binaries** (W8A16), native **1024px** (128×128 latent). These are compiled for the
Hexagon DSP and are **not** a portable format like GGUF. The shipping set is V75-native and is
**forward-compatible** (a lower-arch binary also runs on a higher-arch DSP), covering Hexagon
**V73 → V81**.

| Stage | File |
|-------|------|
| CLIP-L text encoder (fp16) | `text_encoder_1_fp16.bin` |
| OpenCLIP-bigG text encoder (fp16) | `text_encoder_2_fp16.bin` |
| combined embedding MLP | `sdxl_emb_mlp.bin` |
| UNet | `unet.bin` |
| VAE decode (TAESDXL tiny-VAE) | `taesdxl_decoder.mnn` |
| tokenizers | `tokenizer/`, `tokenizer_2/` |

See `manifest.json` for the authoritative file set (with per-file size + md5) that the app uses to
download the bundle.

## Usage

This bundle is loaded automatically by the TokForge Android app — it is not a standalone diffusers
checkpoint. The app downloads the file set from `manifest.json` and runs the binaries on the device NPU.

## License & attribution

This model is a derivative of [`stabilityai/sdxl-turbo`](https://huggingface.co/stabilityai/sdxl-turbo)
and is distributed under the **Stability AI Community License**
([LICENSE](https://huggingface.co/stabilityai/sdxl-turbo/blob/main/LICENSE.md)). Attribution to Stability AI
and retention of the license text are required.