Head to head / Harness
Google Antigravity vs Reasonix
Google Antigravity: Google's agent-first IDE, desktop app, CLI, and SDK for running agent teams. Reasonix: Open-source coding agent for the terminal, desktop app, browser and VS Code.
| Fact | Harness | Harness |
|---|---|---|
| Kind | Harness | Harness |
| Status | Active | Active |
| Source | Closed source | Open source |
| License | proprietary | MIT |
| Pricing | Freemium · Individual Free · Google AI Pro $19.99/mo · Business (Google Cloud) $30/mo · Google AI Ultra (5x) $100/mo · Google AI Ultra (20x) $200/mo | Free · Free |
| Model access | Your subscription | Your API key |
| Platforms | macOS, Linux, Windows | macOS, Linux, Windows |
| Interfaces | Desktop, CLI, IDE extension, API | CLI, TUI, Desktop, Web, IDE extension |
| Install | curl -fsSL https://antigravity.google/cli/install.sh | bash | npm install -g reasonix |
| GitHub | No public repository | ★ 35.8k · 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