Ask HN: Open-Source Coding Model and Harness at Claude Sonnet / Opus Level Perf?

3 pointsby connecteevhace 3 meses3 comments

I am tired of Anthropic's rate limits. Is there a coding model + coding harness combination that I can run 100% locally? I need a local AI model and coding harness that matches Claude Code in performance (ideally Opus-level, but Sonnet-level would also be amazing). With Claude Code's Mar 31 leak, we now have free, open source competing harnesses like https://github.com/ultraworkers/claw-code and https://github.com/Gitlawb/openclaude Has anyone found a 100% local setup that rivals Claude's models in quality for professional-level agentic coding?

Some Context: - I have about 20GB-30GB of space left on my Macbook Pro, which I can use for downloading a local model. I do not want to use Ollama Cloud and pay yet another $20/mo subscription. - I have tried Gemma 4 on Ollama (Google's SOTA open source model that released Apr 2026), and it is absolute garbage. Stay away.

3 comments

jb_hnhace 3 meses

Re: open-source harnesses, ForgeCode appears to be pretty good (currently, #1 on Terminal Bench 2.0 -- https://www.tbench.ai/leaderboard/terminal-bench/2.0). Re: open models, Kimi K2.6 might be a good place to start, but admittedly I'm not too sure how it'd compare to Sonnet / Opus for your use case.

ting0hace 3 meses

It's terrible, don't waste your time like I did. That bench means nothing by the way.

alex_w_systemshace 2 meses

I have tried Gemma 4 on Ollama (Google's SOTA open source model that released Apr 2026), and it is absolute garbage. Stay away. --can not agree more.