Head to head / Harness
GitHub Copilot CLI vs Grok Build
GitHub Copilot CLI: GitHub's terminal coding agent, with plan mode, subagents, and MCP. Grok Build: xAI's terminal coding agent, with plan mode, parallel subagents, and MCP.
| Fact | Harness | Harness |
|---|---|---|
| Kind | Harness | Harness |
| Status | Active | Active |
| Source | Closed source | Open source |
| License | proprietary | Apache-2.0 |
| Pricing | Freemium · Copilot Free Free · Copilot Pro $10/mo · Copilot Business $19/mo · Copilot Enterprise $39/mo · Copilot Pro+ $39/mo · Copilot Max $100/mo | Freemium · Free · Plus $8/mo · Premium $30/mo · Super $100/mo · Ultra $200/mo |
| Model access | Your subscription, Your API key, Local models | Your subscription, Your API key |
| Platforms | macOS, Linux, Windows | macOS, Linux, Windows |
| Interfaces | CLI, TUI | CLI, TUI |
| Install | npm install -g @github/copilot | curl -fsSL https://x.ai/cli/install.sh | bash |
| GitHub | ★ 11.3k · checked 2026-10-18 | ★ 27.4k · checked 2026-10-18 |
| Last verified | 2026-10-18 | 2026-10-18 |
| Worktrees | ? | ? |
| Parallel agents | ✓ | ✓ |
| Subagents | ✓ | ✓ |
| MCP | ✓ | ✓ |
| Remote access | ? | ? |
| Cloud sandbox | ✗ | ✗ |
| Diff review | ? | ✓ |
| Plan mode | ✓ | ✓ |
✓ yes ✗ no ? not verified yet
How we check facts More head to heads