OpenCode – The open source AI coding agent

https://opencode.ai/

OpenCode | The open source AI coding agent

OpenCode - The open source coding agent.

If I wanted to switch from Claude Code to this - what openai model is comparable to opus 4.6? And is it the same speed or slower/faster? Thank you!
do you care about harness benchmarks or no?
Just a data point, I would need to use it for my workflows. I do have a monorepo with a root level claude.md, and project level claude.md files for backend/frontend.