Llama.cpp – Run LLM Inference in C/C++

Llama.cpp is an open-source C/C++ library that enables running large language model inference locally on consumer hardware, supporting multiple platforms and GPU backends. It automatically optimizes execution using SIMD instructions and GPU offloading, allowing users to load GGUF models and generate responses in real-time with adjustable sampling parameters.

Navigation About Llama.cpp Features Why choose Llama.cpp? How It Works 1. Load the LLM Models: Download any pre-trained models in the GGUF format or convert your own if possible from PyTorch https://pytorch.org/ or SafeTensor formats . LLM models are typically between 2-10 GB in practical sizes for like 7B-13B parameters. The GGUF format includes all the of necessary metadata, tokenizer information and model weights in a single portable file. 2. Optimize the Execution: llama.cpp is capable of automatically detecting your hardware including CPU features and available GPU s and thus configures optimal execution paths using SIMD instructions and GPU kernels. The engine automatically selects the best quantization kernels for your processor, determines how many layers to offload to GPU if available and configures memory mapping too. 3. Run your Inference: Process prompts through the model using quantized weights and optimized attention mechanisms. You can generate responses in real-time The system maintains a key-value cache for efficient multi-turn conversations, streams tokens as they are generated for responsive user experiences and applies your chosen sampling parameters to control the output quality. You can always adjust temeprature, penalties and other such settings on the go for tuning generation behavior for specific use cases. Technologies and Architecture System Requirements - C++11 compatible compiler - 4GB RAM for small LLM models - Any modern CPU - Linux, macOS, or Windows - 16GB+ RAM - Modern CPU with AVX2 - NVIDIA/AMD GPU optional - SSD for model storage - Linux x86, ARM - macOS Intel & Apple Silicon - Windows x86 - Android, iOS, FreeBSD - NVIDIA CUDA compute 6.0+ - AMD ROCm - Apple Metal - Vulkan, OpenCL, SYCL Core Dependencies Core Dependencies - C++11 compiler GCC, Clang and MSVC - Standard C++ library - No external runtime dependencies - CUDA Toolkit from Nvidia - ROCm from AMD - Vulkan SDK - Intel oneAPI SYCL - CMake 3.14+ - Make/Ninja - Platform SDK Screenshots See how the Llama.cpp GUI interface looks like in action with the different capabilities it has and how you can interact with it. Frequently Asked Questions Below are frequently asked questions about llama.cpp that are usually asked by the users. We hope these answer all of your outstanding questions regarding running LLM inference using llama.cpp.