GPT4All

One line: GPT4All (nomic-ai, 3.10.0) is a fully offline desktop chat app for open models — no API calls, no GPU required: download a model in the app and chat; turn local folders into a private, cited knowledge base (LocalDocs).

What you get

• 100% local chat: models run on your machine (llama.cpp backend), nothing leaves your computer
• In-app model library from HuggingFace (GGUF, 3–13B sweet spot for consumer hardware)
• LocalDocs: index a folder, ask questions, get answers with a Sources list (on-device Nomic embeddings)
• Optional OpenAI-compatible local API on http://localhost:4891/v1 for other apps
• Optional: connect a cloud provider key from the Models page (does not download a model)

Before you start (3 minutes)

Not needed: a GPU (Vulkan acceleration is optional), administrator rights (per-user install), Python, Node.js or Docker.

Install

Route A: install with AiBOX (recommended)

1. Open AiBOX → app directory → GPT4All → Install
2. AiBOX downloads the official installer (sha256-verified, accelerated automatically in CN) and

runs its Qt Installer Framework silent mode (--silent): Windows installs per-user into %USERPROFILE%\gpt4all (zero elevation), binary at %USERPROFILE%\gpt4all\bin\chat.exe; macOS installs into /Applications (GPT4All.app)

Route B: manual install (official channels)

• Windows: download the x64 (or ARM) installer from gpt4all.io or the

GitHub Releases page, double-click and follow the wizard

• macOS: download gpt4all-installer-darwin.dmg, open it and run the installer app
• Linux: gpt4all-installer-linux.run or the Flathub package (manual route)

Configuration: download your first model

1. Launch GPT4All → Start Chatting
2. Models (left menu) → + Add Model → search the Explore list → Download

• Recommended starter: Llama 3 Instruct (4.66 GB, 8 GB RAM); tight on memory →

Phi-3 Mini (2.18 GB / 4 GB) or Mini Orca (1.98 GB / 4 GB)

1. Chats → Load Default Model → type a message — a normal reply means the chain works
2. LocalDocs (optional): LocalDocs → + Add Collection → name it and pick a folder →

Create; when the green Ready indicator shows, toggle LocalDocs in the top-right of a chat

1. Local API (optional): Settings → Application → Advanced → check

Enable Local API Server (default port 4891, OpenAI-compatible)

Verification: what "success" looks like

1. "%USERPROFILE%\gpt4all\bin\chat.exe" --version prints 3.10.0

(macOS: /Applications/GPT4All.app/Contents/MacOS/gpt4all --version)

1. The Models page lists your downloaded model
2. A chat message gets a coherent reply = app + model + inference all working
3. Stronger check (API): with the local server enabled,

curl http://localhost:4891/v1/models lists your models

1. LocalDocs: ask a question only your file can answer → the reply cites Sources

FAQ

• Error loading models: a HuggingFace model may be incompatible with the backend — pick an

officially listed model from the in-app Models page (official troubleshooting guide)

• Nonsense / incoherent answers: try a different model; small quantized models are limited —

Llama 3 8B q4_0 is a good default

• Answers are wrong about my files: enable LocalDocs and phrase prompts as "according to the

docs…" — models answer better with the relevant snippets in context

• LocalDocs ignores my files: weaker models skip snippets; prompt with "in the provided files"

and make sure the collection shows Ready

• Where are models stored? Settings → Application → Download Path

(Windows default %LOCALAPPDATA%\nomic.ai\GPT4All)

• API won't connect: it listens on HTTP only, 127.0.0.1 only (not ::1), port 4891 by default

Uninstall

• Windows: remove the app via Settings → Apps (if no entry appears, delete

%USERPROFILE%\gpt4all); models/data live in %LOCALAPPDATA%\nomic.ai\GPT4All — delete to reclaim space

• macOS: quit the app, drag GPT4All.app to the Trash; also delete

~/Library/Application Support/nomic.ai/GPT4All if you want the downloaded models gone

More: official docs · website · repo