Claude’s web and desktop apps reportedly got faster during a two-week engineering sprint

Anthropic says a two-week performance sprint in August made the core experience in claude.ai and the Claude desktop app about three times faster. The headline figure is a geometric mean across 13 measurements, so it does not mean every action became exactly three times faster.

Anthropic's engineering account says the team focused on four journeys that represent 95% of user activity: launching the app, starting a conversation, loading an existing conversation and sending a message. At the 75th percentile, the time from a fresh load to a typeable claude.ai page fell from 3.1 seconds to 0.55 seconds. Starting a new Claude Code session dropped from 0.8 seconds to 0.3 seconds, while loading a Claude Cowork cloud session went from 2.6 seconds to 0.73 seconds.

Claude measured, proposed and monitored the changes

The team used an internal research model called Claude Tag to analyze telemetry, build benchmarks, find bottlenecks, propose fixes and watch deployments. Engineers remained responsible for setting goals, weighing tradeoffs and approving each change. Anthropic says more than 3,000 changes merged during the sprint without a customer-facing incident or rollback.