litert-community/Qwen2.5-0.5B-Instruct
This model provides a few variants of Qwen/Qwen2.5-0.5B-Instruct that are ready for deployment on Android using the LiteRT (fka TFLite) stack and MediaPipe LLM Inference API (in maintenance-only mode).
Use the models
Colab
Disclaimer: The target deployment surface for the LiteRT models is Android/iOS/Web and the stack has been optimized for performance on these targets. Trying out the system in Colab is an easier way to familiarize yourself with the LiteRT stack, with the caveat that the performance (memory and latency) on Colab could be much worse than on a local device.
Android
- Download and install the apk.
- Follow the instructions in the app.
The source of this demo app has been removed from the MediaPipe samples repository.
This repository has no .litertlm file for LiteRT-LM.
Performance
Android
Note that all benchmark stats are from a Samsung S24 Ultra with 1280 KV cache size with multiple prefill signatures enabled.
| Backend | Prefill (tokens/sec) | Decode (tokens/sec) | Time-to-first-token (sec) | Memory (RSS in MB) | Model size (MB) | |
|---|---|---|---|---|---|---|
| fp32 (baseline) | cpu | 90.30 tk/s |
16.71 tk/s |
5.24 s |
4,503 MB |
1,898 MB |
| dynamic_int8 | cpu | 250.73 tk/s |
29.97 tk/s |
2.31 s |
1,363 MB |
521 MB |
- Model Size: measured by the size of the .tflite flatbuffer (serialization format for LiteRT models)
- Memory: indicator of peak RAM usage
- The inference on CPU is accelerated via the LiteRT XNNPACK delegate with 4 threads
- Benchmark is done assuming XNNPACK cache is enabled
- dynamic_int8: quantized model with int8 weights and float activations.