Head to head / Harness
OpenCode vs Reasonix
OpenCode: Open-source coding agent with terminal, desktop, IDE, and browser interfaces. Reasonix: Open-source coding agent for the terminal, desktop app, browser and VS Code.
| Fact | Harness | Harness |
|---|---|---|
| Kind | Harness | Harness |
| Status | Active | Active |
| Source | Open source | Open source |
| License | MIT | MIT |
| Pricing | Freemium · Free · OpenCode Go $10/mo · OpenCode Go Plus $40/mo · OpenCode Zen Pay as you go | Free · Free |
| Model access | Your subscription, Your API key, Vendor credits, Local models | Your API key |
| Platforms | macOS, Linux, Windows, Web | macOS, Linux, Windows |
| Interfaces | CLI, TUI, Desktop, Web, IDE extension | CLI, TUI, Desktop, Web, IDE extension |
| Install | curl -fsSL https://opencode.ai/install | bash | npm install -g reasonix |
| GitHub | ★ 216k · checked 2026-10-18 | ★ 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