“Once Claude can measure something, it can make it faster. So we kept finding more things to measure.”

claude.dev blog · Sep 22 · Anthropic speeds up claude.ai 3x using Claude itself in a two-week sprint

“We merged more than three thousand changes without a single customer-facing incident or rollback.”

claude.dev blog · Sep 22 · Anthropic speeds up claude.ai 3x using Claude itself in a two-week sprint

“In aggregate, we estimate that saves tens of thousands of user-hours of waiting every day.”

claude.dev blog · Sep 22 · Anthropic speeds up claude.ai 3x using Claude itself in a two-week sprint

“It performs at the level of Claude Fable 5.1 on most work and costs 40% less to run than Opus 5.”

anthropic.com · Sep 21 · Anthropic launches Claude Opus 5.5, cutting price 40% while lifting coding performance

“One tester completed a 680,000-line code migration in less than a day—work that would have taken an engineering team weeks.”

anthropic.com · Sep 21 · Anthropic launches Claude Opus 5.5, cutting price 40% while lifting coding performance