Box for Linux v0.4.0
The biggest update yet — Box grows from a chat app into a full on-device AI workbench. New this release: a local coding agent, an image studio, a second model engine, and a top-to-bottom visual overhaul. Everything still runs entirely on your own machine, with no account and no telemetry.
If Claude Code, LM Studio, Jan, Stable Diffusion, and your favourite RAG app all had a baby — it would be Box. One private, offline app that does what used to take five.
Important
Box for Linux is a separate application, written from scratch — not a port or fork of the Android app. It is distributed as a closed-source binary; the .deb ships compiled native code and its source is not published.
Headline features
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Box Code — a local coding agent. A standalone workspace, in the spirit of Claude Code, that runs locally offline on your own models. Point it at a project folder and give it tasks: it reads, searches, edits files, runs commands, and iterates until the job is done. Persistent sessions you can resume, syntax-highlighted transcripts, a live working indicator, type-ahead while it works, and Esc to interrupt. Two modes — Ask (approve each change, with a preview) or Auto (hand it a task and walk away). Optional web research, off by default. Runs on both engine types.
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Image Studio — generate, inpaint, erase, upscale. On-device image generation with Z-Image Turbo and FLUX.2-klein, plus classic Stable Diffusion models. One-click model downloads, image-to-image, inpainting with a paintable mask, hires fix for larger images, LoRA support, live previews as the image renders, and a redesigned two-pane layout. The Erase tab removes objects; Upscale does a clean 4×.
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A second model engine. Box now runs GGUF models (via llama.cpp) alongside its native
.litertlmmodels — Gemma, Qwen, and more. A built-in model hub downloads chat, coder, and image models in one click, all verified. Pick either engine anywhere models are used. -
A new look. A far-left navigation rail puts Chats, Notebooks, Image Studio, and Box Code one click away — repositionable to any edge, with optional labels. Glass and Liquid Glass modes give a translucent, luminous window that works with any theme. 52 themes total, custom header fonts, syntax-highlighted code in chat, and refreshed window controls.
Also new
- Kernel-sandboxed inference — model engines and the coding agent's shell run locked down: confined to their own files, no stray network. The Security page shows exactly what's enforced on your machine.
- App Lock now covers the whole app, every window, behind a passphrase — with lock-to-tray.
- Faster, smoother streaming in long replies; quicker startup.
- Richer About dialog with a "What's New" panel.
Notes
- On first run Box offers to download a model (~2.6 GB). Image-generation models are optional downloads from within Image Studio.
- CPU-only works out of the box; GPU (Vulkan) acceleration is used automatically where available.
- Requires an up-to-date Ubuntu with a GTK4 / libadwaita desktop.