never heard of nanobot. how reliable is this benchmark?

I can’t speak to the veracity of the benchmarks but it appears their methodology is sound. Nanobot has 47k stars, fwiw https://github.com/HKUDS/nanobot

It has been more of an OpenClaw or Hermes alternative than a coding agent like OpenCode or Pi, so it’s likely to do well given less context bloat.

IMO it's not. It's benchmarking GPT 5.4 and Opus 4.6. It's also missing Claude Code... one of the most popular harnesses (the most?)