Harness (Autonomous)

Last tested:

Harness (Autonomous) is open-source command center that runs Claude Code, Codex and other coding agents across all your machines side by side (category: Coding Agents (CLI & Cloud)). VibeToolRank agent test score: 8.4/10 (tested 2026-10-17, 3 runs, CLI, free model), T-11 of 15 tested Coding Agents (CLI & Cloud) tools. Pricing: App free (open source, MIT); optional Harness Device $149 and Harness Pro $299 desk hardware. Free tier: Yes: the Harness app is a free download and open source (MIT).

Key facts

Verdict: Harness started OpenCode 3 times on our seeded cart bug and each run fixed it (4/4 tests pass) in 19-38s, at $0 with a free model.

Best for: developers running several coding agents across machines who want to start and track them from one CLI.
Not ideal for: locked-down machines (it installed agents and hooks into global config, and passed shell secrets to agent panes).

VibeToolRank score
8.4/10
Rank
T-11 of 15 tested Coding Agents (CLI & Cloud)
Category
Coding Agents (CLI & Cloud)
Last tested
2026-10-17
Runs
3 runs
Outcome score
9/10
Edition tested
Harness CLI v0.4.17 (Linux) running OpenCode 1.19.3 with the free Big Pickle model
Free plan, as measured
$0: OpenCode's free Big Pickle model, no API key or OpenRouter quota
Free plan
Yes: the Harness app is a free download and open source (MIT)
Price
App free (open source, MIT); optional Harness Device $149 and Harness Pro $299 desk hardware
Pricing checked
2026-10-17
Sources
autonomous.ai/harness · github.com/autonomous-ai/openharness · producthunt.com/products/harness-by-autonomous · test log in our repo

Visit Harness (Autonomous)

Pricing and free tier

Current official pricing (checked ): App free (open source, MIT); optional Harness Device $149 and Harness Pro $299 desk hardware

Is Harness (Autonomous) free? Yes: the Harness app is a free download and open source (MIT)

The Harness app is free and open source (MIT). You pay for whatever agents and models it runs; we used OpenCode's free Big Pickle model, so it cost $0.

verified-official official source · full-page-read. Official plan limits can change; re-check the vendor page before paying. Figures from our tests are recorded observations, not a current-capacity promise.

What we measured in our test (2026-10-17, 3 runs): $0: OpenCode's free Big Pickle model, no API key or OpenRouter quota Harness (Autonomous) free tier: how far you get

Agent test verdict

Edition tested Harness CLI v0.4.17 (Linux) running OpenCode 1.19.3 with the free Big Pickle model. Results may differ for the hosted product.

Tested 2026-10-17 · 3 runs · rubric v0.1 (provisional thresholds). Harness started OpenCode 3 times on our seeded cart bug and each run fixed it (4/4 tests pass) in 19-38s, at $0 with a free model. Before that, the first attempt picked a paid Claude model because Harness passed our shell's Cloudflare token to the agent. Harness also installed OpenCode and plugins into global config by itself.

DimensionScore /10
Outcome (40%)9
Speed (15%)9
Cost (15%)10
Developer experience (15%)5
Reliability (15%)8
Overall8.4

How we tested

  • Harness CLI v0.4.17 on Linux, signed in, with agents-start-agents on; tested 17 Oct 2026.
  • Task: our T3 seeded bugfix repo, 3 runs via harness new opencode with the free Big Pickle model pinned in a project opencode.json; we checked each with node --test.
  • A first attempt that picked a paid model wasn't counted; we restarted the daemon without deploy tokens in its environment.

Pros, cons and who it's for

Pros

  • Started, waited for, read and closed agents from the CLI: harness new, wait, show, close
  • With a free OpenCode model, 3 of 3 runs fixed the seeded bug in 19-38s
  • Free and open source (MIT); no card needed

Cons

  • The person must sign in and turn on agents-start-agents before an agent can start harnesses
  • Agent panes inherit the daemon's environment, secrets included; our first run picked a paid Claude model via Cloudflare AI Gateway
  • Installed OpenCode with curl | bash, edited ~/.bashrc and added plugins to ~/.config/opencode without asking

Who it's for: Developers juggling several coding agents (Claude Code, Codex and others) on more than one machine.

Free-tier limits: The Harness app is free and open source (MIT). You pay for whatever agents and models it runs; we used OpenCode's free Big Pickle model, so it cost $0.

FAQ

Is Harness free?

Yes. The app is MIT open source. Our 17 Oct 2026 test cost $0 because the agent it ran (OpenCode) used a free model.

Did Harness fix the bug?

The OpenCode agent it started fixed our seeded cart bug in 3 of 3 runs (4/4 tests pass) without touching the test file.

Does Harness change my system?

Yes. In our test it installed OpenCode with its curl installer, added a PATH line to ~/.bashrc and put plugins in ~/.config/opencode. We reverted all three.

How did Harness (Autonomous) score in VibeToolRank's test?

8.4/10 overall (outcome 9, speed 9, cost 10, developer experience 5, reliability 8), 3 runs on 2026-10-17. Harness started OpenCode 3 times on our seeded cart bug and each run fixed it (4/4 tests pass) in 19-38s, at $0 with a free model.

Who is Harness (Autonomous) best for?

Based on our test: best for developers running several coding agents across machines who want to start and track them from one CLI. Not ideal for locked-down machines (it installed agents and hooks into global config, and passed shell secrets to agent panes).

How much does Harness (Autonomous) cost?

App free (open source, MIT); optional Harness Device $149 and Harness Pro $299 desk hardware (from the official pricing page, checked 2026-10-17).

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Sources

Scores come from our own tests and are never for sale; sponsored placements are always labelled. Some links are affiliate links (currently Railway). Disclosure