KoboldCpp review

KoboldCpp is the most capable single-file tool here. The project calls itself free and open source software for running GGUF models on your own computer, and it ships as one executable for Windows, Linux or macOS with no installation. It runs on CPU or GPU, with full or partial offloading, so it also works on modest hardware. Text generation covers chat, adventure, instruct and story modes, and the bundled KoboldAI Lite interface adds memory, world info, author's notes and imports of Tavern character cards, which is why it is popular for fiction and roleplay. It goes well beyond text: image generation and editing with Stable Diffusion, SDXL and Flux, video generation, Whisper speech recognition, several text-to-speech engines and music generation. MCP, tool calling, web search and a built-in agent cover newer workflows, and compatible endpoints let apps that expect OpenAI, Ollama or ComfyUI connect to it. The interface has many settings, which costs it points on ease of setup.

Who it is for

Writers, roleplayers and hobbyists who want one portable file that does text, images and voice locally.

Price

Free and open source (AGPL-3.0).

KoboldCpp is free and open-source software for running GGUF large language models (LLMs) on your own computer.
Quoted from the vendor pricing page on November 10, 2026.

Key features

• Chat, adventure, instruct and story writing modes for GGUF models
• Image generation with Stable Diffusion, SDXL, Flux and more
• Speech-to-text with Whisper and text to speech with several models
• MCP, tool calling, web search, RAG and a built-in agent
• Compatible endpoints for OpenAI, Ollama and ComfyUI clients

Strengths and weaknesses

• Strength: One executable with no installation and no external dependencies
• Strength: Runs on CPU or GPU with full or partial offloading
• Strength: Writing tools such as memory, world info and character cards
• Weakness: Interface is aimed at hobbyists and has many settings
• Weakness: AGPL-3.0 license has obligations if you distribute changes
• Weakness: The project warns about phishing copies, so download only from official links

Key facts

• License: AGPL-3.0
• Install: Single executable, no installation
• Based on: llama.cpp
• GitHub stars: 12.2K

Where it ranks

KoboldCpp is No. 6 in our Best Local LLM Apps verdict.