GoKawiilAnthropic sped up Claude.ai and desktop app roughly 3x in two-week sprint
Anthropic engineers spent a two-week sprint in August optimizing four core user journeys in claude.ai and the Claude desktop app, which together account for 95% of user activity. Measured at the 75th percentile, load time for a fresh claude.ai page dropped from 3.1 seconds to 0.55 seconds, new Claude Code sessions went from 0.8 to 0.3 seconds, and Claude Cowork cloud sessions improved from 2.6 to 0.73 seconds, with a 3.1x average speedup across 13 measurements.
GoKawiil's interpretation of the reporting above, not reported fact.
Anthropic says the aggregate time savings could amount to tens of thousands of user-hours per day, suggesting performance had become a meaningful friction point for adoption of its AI tools. The sprint's tight, cross-functional structure—run through a single Slack channel—may signal a broader push by Anthropic to treat latency as a competitive differentiator against rival AI assistants where speed and responsiveness shape user experience.
- Claude.ai fresh load times improved from 3.1s to 0.55s at the 75th percentile
- Anthropic estimates the changes save tens of thousands of user-hours daily
- The optimization sprint targeted four journeys covering 95% of user activity
Source: claude.dev — Raymond Wang, 2026-09-23
Published there as: “How we made claude.ai 3x faster in two weeks”
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