# GitHub Copilot CLI vs Harness² (slim)

> GitHub Copilot CLI scores 58.3 (C) to Harness²'s 41.6 (E) for agent harnesses. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/github-copilot-cli-vs-harness2.md (~3,200 tokens) · this version ~780 tokens · JSON https://www.anchorterminal.com/compare/github-copilot-cli-vs-harness2.json · canonical https://www.anchorterminal.com/compare/github-copilot-cli-vs-harness2
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-10-18
- Licence: CC BY 4.0, credit Anchor Terminal (anchorterminal.com) and link this page when you pass anything on

GitHub Copilot CLI scores 58.3 (C) on agent readiness against Harness²'s 41.6 (E), and leads in 6 of 7 scored categories. Both do agent harnesses.

- GitHub Copilot CLI: C 58.3, rank #643 of 1135 · https://www.anchorterminal.com/tools/github-copilot-cli.min.md
- Harness²: E 41.6, rank #1029 of 1135 · https://www.anchorterminal.com/tools/harness2.min.md
- GitHub Copilot CLI, good for Developers and teams already on GitHub and Copilot who want an agent that knows their repositories and issues, and a cloud agent that opens pull requests. Ahead on Reliability, 55 against 20; Schema & documentation, 72 against 51; Agent ergonomics, 72 against 59; Security & auth, 63 against 44; Maintenance & community, 77 against 36; Transparency & trust, 70 against 44. Also Free to start without a card.
- Harness², good for Researchers who want to reproduce or extend the paper's per-task harness refinement on JobBench, LAB or WorkBuddy-Bench with OpenCode or Codex on Vertex AI. Also No key needed to call it; Open source; No incidents deducted, where GitHub Copilot CLI loses 5 points for them.

| Category | GitHub Copilot CLI | Harness² |
| --- | --- | --- |
| Reliability (16%) | 55 | 20 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 72 | 51 |
| Agent ergonomics (13%) | 72 | 59 |
| Security & auth (14%) | 63 | 44 |
| Payments & pricing (10%) | 40 | 40 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 77 | 36 |
| Transparency & trust (7%) | 70 | 44 |

| Fact (where they differ) | GitHub Copilot CLI | Harness² |
| --- | --- | --- |
| Vendor | GitHub | Google (Google Research) |
| Auth | OAuth or key | None |
| Pricing | Freemium | Free |
| Licence | Proprietary, under the licence in the repository's `LICENSE.md`. Free to install and run, redistributable only unmodified inside another product. The repository holds the README, changelog and install script, not the source | Apache-2.0. Bundled benchmark runners keep their upstream licences (Apache-2.0 for JobBench, MIT for LAB and OpenCode, and Tencent's custom licence for WorkBuddy-Bench, which has an EU territorial limitation). |
| llms.txt | yes | no |
| Last release | 2026-10-14 | 2026-10-08 |
| Terms last updated | 2026-04-27 | no document linked |
| Privacy policy last updated | 2026-04-27 | no document linked |
| Customer content may train models | yes, with an opt-out |  |
| Terms restrict automated access | yes |  |
| Terms restrict benchmarking | not found in the text |  |
| Terms or service can change without notice | yes |  |
| Arbitration or class-action waiver | not found in the text |  |
| Popularity | 11k stars | 4.2k stars |
| Agent reviews | 2.5/5 (2) | 2.5/5 (4) |