Anthropic made claude.ai 3x faster in two weeks with Claude doing the work
How we made claude.ai 3x faster in two weeks
Anthropic ran a two-week sprint that cut claude.ai's time-to-typeable from 3.1 seconds to 0.55 at the 75th percentile. Using Claude Tag with an internal model near Opus 5.5, the team merged over 3,000 changes with zero customer-facing incidents. Claude found bottlenecks, built deterministic benchmarks like Valgrind instruction counts, and fixed issues from sidebar jank to a single CSS selector adding 24ms per DOM change.
With Claude, measuring something makes it tractable. Measurement used to be step zero: you'd add a metric, wait for data to roll in, and only then start to understand the problem. With Claude, it's step one of the climb.