What is Metis and what is verified harness lift?

Metis is an open-source coding agent harness with verified same-model performance lift. On Terminal-Bench, Metis achieves ~82% with the same model where OpenCode scores ~67%. The harness wraps around your chosen model with closed-loop verification, test execution, and self-healing.

Why switch from Claude Code or OpenCode to Metis?

Switching from Claude Code: same capability with more freedom — not locked to one vendor, MIT licensed, multi-model support. Switching from OpenCode: verified same-model harness lift means measurably better results, not just 'good enough'.

Which models and platforms does Metis support?

Metis supports multiple model providers: Claude, DeepSeek, OpenAI, Ollama. Runs on macOS (Apple Silicon & Intel), Windows, and Linux. Both terminal TUI and desktop GUI interfaces available.

Metis

同模型下，harness 可验证拉高 coding agent 表现

MIT · 多模型 · 终端/桌面 · Terminal-Bench 同模约 82%（vs OpenCode ~67%）

下载 macOS 版

GitHub

npm i -g @wholiver_hu/metis

Metis

可验证同模表现提升的开源 Coding Agent Harness