Harness ManagerGet the app

THE MAC APP FOR YOUR AI STACK

Your AI stack.
Under control.

Manage your coding tools, discover skills and MCPs, and compare models. One native Mac app. Free and open source.

Download for MacExplore model rankings
macOS 14 or later · Apple silicon and Intel
Harness Manager’s native workspace with installed tools, status, and update controls
The whole picture. At a glance.

See what’s installed, what’s running, and what needs an update.

View full size

Your favorites. And your next favorites.

  • Claude Code
  • Codex
  • Gemini CLI
  • Cursor
  • OpenCode
  • Warp
  • Antigravity
  • Antigravity IDE
  • T3 Code
  • Conductor
  • Superset
  • Paseo
  • cmux
  • Orca
  • Herdr
  • Emdash

Less setup to manage.
More space to build.

Your tools, connections, and updates. Together, where you can see them.

Find the next piece
of your workflow.

Browse harnesses, MCPs, and skills by popularity. From Claude Code and Codex to the tools you haven’t tried yet.

Discover screen of the actual Mac app, with logos and install options

Your updates.
Your call.

See what needs an update, review the command, and decide when it runs.

See installed versions
Compare available updates
Review before running
See how it works

The rest of your setup,
in plain sight.

See provider configuration, MCP servers, skills, and running processes alongside the tools that use them.

Providers Local configuration signalsMCP servers Your tools’ connectionsSkills Reusable instructionsProcesses What’s running, and where

BENCHMARKS & RANKINGS

Compare models.
Find your next fit.

Coding, design, reasoning, local models. Compare the options for the work you actually do, right alongside your tools.

Inside the Mac app
Actual Harness Manager Benchmarks page: Coding rankings with model scores, comparison chart, and collection navigation

A better starting point for your next build.

Compare coding models, then dig into agents, tool calling, full stack apps, and more. Find a shortlist that fits the work.

Ranked collections
31
Comparison metrics
7
Find your next model

Real app captures. Rankings change as the data updates.

Data by Modelgrep
From coding to creative work.See all 31 ranking collections

General

  • Smartest
  • Coding
  • Agents
  • Fastest
  • Low latency
  • Cheapest
  • Free

Development

  • Design
  • UI components
  • Full-stack apps
  • Mobile apps
  • Tool calling
  • Long-context reasoning

Reasoning & knowledge

  • Reasoning
  • Math
  • Science
  • Writing
  • Instruction following
  • RAG
  • SQL and analysis

Deployment

  • Local
  • Open-source
  • Small and fast
  • Long context
  • Vision
  • Uncensored

Creative & specialist

  • Data visualization
  • SVG
  • Game development
  • 3D
  • Roleplay

Browse these collections in the app. Compare individual metrics including intelligence, coding, agentic performance, design, speed, latency, and context. Rankings are a starting point; results depend on your task.

THE HARNESS BRIEFING

Beyond
the changelog.

New harnesses. Useful ideas. The story behind the release. Keep up with the ecosystem without keeping twenty tabs open.

Publisher newsCommunity findsOfficial releases

From OpenAI, Google Developers, Simon Willison, Hacker News, and project releases. Every story links to its source.

The native news page with sourced harness articles and a source filterReal articles. Real sources. Read in the app.

Bring your tools.
We’ll help you keep track.

01

Download. Drag. Open.

Move Harness Manager to Applications and open your workspace. No build tools required.

02

See your existing stack.

Find supported tools and configuration already on your Mac, together in one view.

03

Make your next move.

Review an update, discover a skill, or compare models for your next project.

Made for you. Open to everyone.

Free to use, inspect, and make your own. Licensed under Apache 2.0.

Explore the source
Harness Manager app icon

Your stack, sorted.
Back to building.

One workspace for your AI tools. Free and open source.

Download for Mac
macOS 14+ · Apple silicon & Intel

Early preview. This build is not yet notarized.
macOS may require approval in Privacy & Security on first launch.