openai.com vs anthropic.com
Core Web Vitals side-by-side, Chrome user field data
Only openai.com has CrUX data — anthropic.com is too small for anonymization.
| Metric | openai.com | anthropic.com | Winner |
|---|---|---|---|
| LCPLargest Contentful Paint | 2605ms | — | openai.com |
| INPInteraction to Next Paint | 215ms | — | openai.com |
| CLSCumulative Layout Shift | 0.00 | — | openai.com |
| FCPFirst Contentful Paint | 2354ms | — | openai.com |
| TTFBTime to First Byte | 1465ms | — | openai.com |
openai.com
LCPneeds improvement
2605ms
Largest Contentful Paint
INPneeds improvement
215ms
Interaction to Next Paint
CLSgood
0
Cumulative Layout Shift
anthropic.com
No data for anthropic.com
How to read this
Scores come from real Chrome users visiting these sites in the last 28 days, aggregated by Google's CrUX. Lower is better for all metrics. Green = "good," amber = "needs improvement," red = "poor." Learn more about Core Web Vitals or read our CrUX vs Lighthouse guide.