Free & open source · Single .exe, no install

KoboldAI Local Install (KoboldCpp)

A single self-contained executable for local story writing, chat, and roleplay with GGUF models built on llama.cpp, with the classic KoboldAI Lite interface built in.

Download koboldcpp.exe

Opens the official LostRuins/koboldcpp releases page · Windows, no installation required

Maintainer

LostRuins

Cost

Free

Install

None — single .exe

Format

GGUF

What's built in

📖

Story & roleplay UI

The full KoboldAI Lite interface — memory, world info, author's note, characters, and scenarios.

🎨

Image generation too

Also runs Stable Diffusion 1.5, SDXL, and other image models from the same executable.

🔌

Multiple API endpoints

Speaks KoboldCpp, OpenAI, Ollama, and A1111 APIs — plugs into other tools that expect those formats.

⚡

GPU offloading

NVIDIA users get CUDA acceleration out of the box with the right build.

How to run it

  1. Download koboldcpp.exe

    The button above opens the real releases page — grab the plain koboldcpp.exe, or the CUDA-specific build if you have an NVIDIA GPU.

  2. Get a GGUF model

    Weights aren't bundled — download a GGUF-format model separately, for example from Hugging Face.

  3. Drag the model onto the .exe

    Or double-click koboldcpp.exe on its own to open a settings GUI first, pick your model, and hit Launch.

  4. Open the local interface

    By default it's available at http://localhost:5001 in your browser.

Getting GPU acceleration

On Windows with an NVIDIA card, add the --usecublas flag (or set it in the GUI) and make sure you downloaded the CUDA-enabled .exe variant — this offloads model layers to your GPU for a large speed boost over CPU-only.

Good to know: This is an independent overview, not affiliated with LostRuins or the KoboldAI community. The link above goes to the real official releases page — this page never hosts the executable itself. "KoboldAI" and "KoboldCpp" are related but separate projects; KoboldCpp is the easiest local-install route and is what this guide covers.