Arbiter

The command center above your AI tools.

Arbiter is a local orchestration layer for dispatching, supervising, and governing AI clients, agents, terminals, and supporting tools. It gives one operator a durable control plane without binding the workflow to a single model provider or coding client.

Arbiter 0.1.3 is the current public pre-release, for Windows and Linux: an early build for early adopters. Download it from Releases.

Arbiter needs a license. During the pre-release it is free: ask for one at arbitermcp.com, and the email brings your key. Activate it in the app's first screen.

• Windows 10 or 11 (x64): Arbiter_0.1.3_x64-setup.exe (installer) or Arbiter_0.1.3_x64_en-US.msi. Windows will warn that it protected your PC, because this build is not code-signed yet: choose More info, then Run anyway.
• Linux x64: Arbiter_0.1.3_amd64.deb (sudo apt install ./Arbiter_0.1.3_amd64.deb) or Arbiter_0.1.3_amd64.AppImage. Arbiter needs glibc 2.34 or newer, and the desktop app needs WebKitGTK 4.1.
• arbiter-0.1.3-windows-x64.zip and arbiter-0.1.3-linux-x64.tar.gz hold the engine alone, without the desktop app.
• Graphics card: 8 GB of graphics memory or more, and a driver with Vulkan support, which current NVIDIA, AMD and Intel drivers have. The local model fits itself to the card: a card with 10 GB or more runs it at its full context window, and an 8 GB card runs a smaller quantization of the same model. On a card with less, the local model does not start and the rest of Arbiter works.
• After installing: Arbiter's local brain runs a model that is a separate download of about 5 to 7 GB (Gemma 4, Apache 2.0 license, from Hugging Face; no account is needed). The Windows setup offers it at the end; the app offers it on every page until it is in place; on a machine without the app, arbiter setup-llm downloads it.

macOS is not supported yet. The release notes list everything else Arbiter needs.

Every file is listed with its SHA256 in arbiter-0.1.3-<os>-x64.SHA256SUMS, signed with the Code Reality Labs release key arbiter-release-signing-key.asc (fingerprint 0CF6 23D6 6975 AC42 EF02 A1EA 98F3 6798 1E68 D3E3), all attached to the release.

gpg --import arbiter-release-signing-key.asc
gpg --verify arbiter-0.1.3-linux-x64.SHA256SUMS.asc arbiter-0.1.3-linux-x64.SHA256SUMS
sha256sum -c --ignore-missing arbiter-0.1.3-linux-x64.SHA256SUMS

On Windows, Get-FileHash .\Arbiter_0.1.3_x64-setup.exe in PowerShell prints the SHA256 to compare with its line in arbiter-0.1.3-windows-x64.SHA256SUMS; GnuPG for Windows (Gpg4win) checks the signature with the same gpg --verify command.

• Product: arbitermcp.com
• Engineering journal: blog.arbitermcp.com
• Made by: Code Reality Labs

Arbiter is proprietary software. Copyright (C) 2026 Code Reality Labs. All rights reserved.

See LICENSE for terms. Commercial licensing and partnership inquiries: Code Reality Labs.