aavetis/PRarena. Albert Avetisian runs this repository on GitHub which uses the Github Search API to track the number of PRs that can be credited to a collection of different coding agents. The repo runs this collect_data.py script every three hours using GitHub Actions to collect the data, then updates the PR Arena site with a visual leaderboard.
The result is this neat chart showing adoption of different agents over time, along with their PR success rate:
I found this today while trying to pull off the exact same trick myself! I got as far as creating the following table before finding Albert's work and abandoning my own project.
Tool | Search term | Total PRs | Merged PRs | % merged | Earliest |
---|---|---|---|---|---|
Claude Code | is:pr in:body "Generated with Claude Code" |
146,000 | 123,000 | 84.2% | Feb 21st |
GitHub Copilot | is:pr author:copilot-swe-agent[bot] |
247,000 | 152,000 | 61.5% | March 7th |
Codex Cloud | is:pr in:body "chatgpt.com" label:codex |
1,900,000 | 1,600,000 | 84.2% | April 23rd |
(Those "earliest" links are a little questionable, I tried to filter out false positives and find the oldest one that appeared to really be from the agent in question.)
It looks like OpenAI's Codex Cloud is massively ahead of the competition right now in terms of numbers of PRs both opened and merged on GitHub.
Recent articles
- Designing agentic loops - 30th September 2025
- Claude Sonnet 4.5 is probably the "best coding model in the world" (at least for now) - 29th September 2025
- I think "agent" may finally have a widely enough agreed upon definition to be useful jargon now - 18th September 2025