Wealthfront redesigned its internal code review tool, Iris Code Review, to pit Anthropic’s Opus 4, GPT-5, and Gemini 3.0 Flash against each other before posting comments, spending $4 per pull request to prioritize silence over noise. Two hosts work through the empirical research on developer attention costs and low-signal review rejection rates that backs up that bet.
They also take seriously the counterargument: whether a quieter automated reviewer is actually catching more, or just routing bugs past human reviewers who miss them anyway — a question Wealthfront’s own published numbers don’t fully settle.