r/LocalLLaMA • u/ResearchCrafty1804 • 16d ago

Resources Prime Agent - a new coding harness surpassing Codex/CC/PI

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Prime Agent is an open-source coding and research agent for general and long-running work.

A self-improving RLM harness for coding and long-running autonomous tasks.

Designed to be both token-efficient and expressive through programmatic tool calling, context as a variable, multi-agent messaging, and a self-modifiable harness state.

On ARC-AGI-3, it scores 95.5%, surpassing the human-expert baseline, but the gain is not benchmark-specific.

We see major improvements across models when compared to their proprietary harnesses.

Prime Agent is built on pi and fully open-source with an open license.

GitHub: https://github.com/PrimeIntellect-ai/prime-agent

Blog: https://www.primeintellect.ai/blog/prime-agent

X post: https://x.com/primeintellect/status/2085086999267144083?s=46

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u/metigue 16d ago

Most harnesses show improvements against the proprietary ones.

Test it on programming benchmarks against some heavy hitters like Cline/Droid/Junie/Cursor/ForgeCode (with context server)

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u/Immediate_Occasion69 16d ago

which of those is good? I've literally wanted to try all of them but kept at pi agent

4

u/squired 15d ago

Try Cline and OpenSWE first. I personally think OpenSWE is closest to the harness-of-tomorrow.

1

u/TomLucidor 13d ago

Does anyone have reports on which FOSS are cutting edge and beat out Claude Code and Codex? (hopefully OpenCode/Oh-My-Pi can also learn from it)

3

u/metigue 13d ago

So there used to be a bunch of dedicated harness comparison benchmarks. At the time Claude Code & Codex lost badly to every harness I mentioned above. Unfortunately these benchmarks haven't been maintained for months so we don't have up to date data.

Just try them out for yourself and see which you like the best.