# Burn Candle Backend > **Deprecated:** This crate is deprecated as of `0.21.0-pre.2` and will be removed in a future release. > Please migrate to one of the actively maintained backends: > - **CubeCL backends** (CUDA, ROCm, Vulkan, Metal, WebGPU) for GPU acceleration > - **NdArray** for portable CPU execution > - **LibTorch** (`burn-tch`) for a mature CPU/GPU backend This crate provides a backend for [Burn](https://github.com/tracel-ai/burn) based on the [Candle](https://github.com/huggingface/candle) framework. ## Feature Flags - `cuda` - Cuda GPU device (NVIDIA only) - `accelerate` - Accelerate framework (macOS only)