GPTLocalhost

GPTLocalhost is a Microsoft Word add in that connects Word to large language models running on the user's own computer or network. Its tagline is Local First AI for Word. The vendor says data never leaves the device, no cloud service is required, and the add in works offline once a device is registered. It does not supply a model itself. Users install their own local LLM server, and the site shows demos with AnythingLLM, LM Studio, Ollama, llama.cpp, LocalAI, KoboldCpp, Xinference, OpenLLM, LiteLLM, Transformer Lab, Msty and Microsoft Foundry Local, with local models such as Llama 3.2, Phi 4 and IBM Granite. It is aimed at professionals who draft, translate or analyze documents in Word and cannot or would rather not send content to a cloud AI service, including teams working on contracts. The demos cover generation and dialogue across documents, translation, switching between models, automatic Markdown conversion and Apple Intelligence in Word. An intranet edition called LocPilot lets a team share a local model server. Downloads are offered for Windows 10 and 11 and for macOS 11 or newer. There is a free plan with basic features, a monthly subscription with unlimited length, advanced features, auto upgrade and email support, and a one time lifetime license that includes one year of support and up to five devices registered for full offline use. Listed prices exclude tax.