there is a leaderboard/benchmark of autonomous coding agents at https://www.swebench.com/
at a first glance the highest-ranking one that is clearly open source appears to be https://github.com/SWE-agent/SWE-agent
there is a leaderboard/benchmark of autonomous coding agents at https://www.swebench.com/
at a first glance the highest-ranking one that is clearly open source appears to be https://github.com/SWE-agent/SWE-agent