x.ai

Ranks Overall #1,807 Developer Tooling #96 AI #13

Data from Oct 16, 2026, 5:38 AM UTC 15h old Measured every 2 days · 21 runs since Aug 31, 2026

Elsewhere: PageSpeed Insights · Calibre · Treo · CrUX Vis · Tame the Bots · Scoring Calculator · Wayback Machine

Lab data is measured using Lighthouse, Mobile mode unless otherwise specified. Field data is reported from Chrome UX Report (using p75 measurements).

Stack

Built with Next.js

Uses React

Hosted by Cloudflare

Filmstrip LAB Throttled

How the page drew during the measured load, at 9 points across 22.82 s. Compare this filmstrip against another site.

2.06 s
5.70 s
8.56 s
11.41 s
13.33 s
14.26 s
17.11 s
19.96 s
22.82 s

Lighthouse Scores LAB Simulated

Performance

↓ -3 (-7.9%)

Accessibility

no change

Best Practices

↓ -19 (-26%)

SEO

no change

Metrics LAB FIELD

Core Web Vitals: failing 3 of 3 assessed from real Chrome users.

Field figures are the p75 across real Chrome users over a 28-day trailing window (2026-09-16 → 2026-10-13), url-level.

Metric	Lab Simulated	Field
LCP CWV Largest Contentful Paint	20.56 s poor	↑ +735 ms (+3.7%) 17.18 s – 24.17 s	5.90 s poor	44.8% 15.1% 40.1%
INP CWV Interaction to Next Paint — field only, no lab run can measure it	n/a	—	534 ms poor	50.4% 23.4% 26.2%
CLS CWV Cumulative Layout Shift	0.002 good	↑ +0.001 (+100%) significant 0 – 0.010	0 good	98.6% 1.2% 0.1%
TBT Total Blocking Time	4.23 s poor	↑ +1941 ms (+84.7%) significant 1.82 s – 4.66 s	n/a	—
FCP First Contentful Paint	1.75 s good	↓ -96 ms (-5.2%) significant 1.72 s – 1.90 s	2.16 s needs work	62.7% 24.1% 13.1%
Speed Index	10.13 s poor	↑ +2322 ms (+29.7%) significant 6.59 s – 10.50 s	n/a	—
TTFB Time to First Byte	617 ms good	↓ -6 ms (-1%) 609 ms – 642 ms	1.04 s needs work	60.6% 28.9% 10.5%

Metric

Lab Simulated

Field

Value

Change / range

Trend

p75

Distribution

LCP CWV Largest Contentful Paint

20.56 s poor

↑ +735 ms (+3.7%) 17.18 s – 24.17 s

5.90 s poor

44.8% 15.1% 40.1%

INP CWV Interaction to Next Paint — field only, no lab run can measure it

n/a

—

534 ms poor

50.4% 23.4% 26.2%

CLS CWV Cumulative Layout Shift

0.002 good

↑ +0.001 (+100%) significant 0 – 0.010

0 good

98.6% 1.2% 0.1%

TBT Total Blocking Time

4.23 s poor

↑ +1941 ms (+84.7%) significant 1.82 s – 4.66 s

n/a

—

FCP First Contentful Paint

1.75 s good

↓ -96 ms (-5.2%) significant 1.72 s – 1.90 s

2.16 s needs work

62.7% 24.1% 13.1%

Speed Index

10.13 s poor

↑ +2322 ms (+29.7%) significant 6.59 s – 10.50 s

n/a

—

TTFB Time to First Byte

617 ms good

↓ -6 ms (-1%) 609 ms – 642 ms

1.04 s needs work

60.6% 28.9% 10.5%

LCP Subparts LAB Throttled

The subparts attribute LCP to your server, resource discovery, download, or rendering. They come from one throttled load, the same one as the filmstrip, so they add up to that load’s LCP rather than the simulated Lab LCP above.

element render delay 12.74 s

time to first byte 592 ms

LCP LAB Simulated vs LCP FIELD

Lab 20.56 s

Field p75 5.90 s

The lab LCP is 3.49× the field p75 — real users likely have above-average hardware or network connectivity.

Page weight

Metric	Value	Change / range
Page Weight	3.03 MB	↑ +183.3 kB (+6.6%) 2.84 MB – 4.18 MB
Requests	169	↑ +17 (+11.2%) 98 – 169
Third-party Weight	1.41 MB	↑ +175.0 kB (+14.6%) 550 kB – 1.41 MB
Third-party CPU	669 ms	↑ +381 ms (+132%) significant 92 ms – 669 ms
Unused JS	819 kB	↑ +124.8 kB (+18.5%) 536 kB – 861 kB
Unused CSS	61.9 kB	↓ -92 B (-0.1%) 60.9 kB – 63.2 kB

Metric

Value

Change / range

Trend

Page Weight

3.03 MB

↑ +183.3 kB (+6.6%) 2.84 MB – 4.18 MB

Requests

169

↑ +17 (+11.2%) 98 – 169

Third-party Weight

1.41 MB

↑ +175.0 kB (+14.6%) 550 kB – 1.41 MB

Third-party CPU

669 ms

↑ +381 ms (+132%) significant 92 ms – 669 ms

Unused JS

819 kB

↑ +124.8 kB (+18.5%) 536 kB – 861 kB

Unused CSS

61.9 kB

↓ -92 B (-0.1%) 60.9 kB – 63.2 kB

By resource type

Type	Share	Size	Requests
script	82.3%	2.49 MB	76
other	6%	181 kB	61
font	4.6%	141 kB	2
image	3.9%	119 kB	17
stylesheet	1.9%	56.7 kB	10
document	1.3%	38.6 kB	3
Total		3.03 MB	169

Third parties 14 entities

Entity	Transfer	Size	Main thread Simulated
Google Tag Manager	script	686 kB	360 ms
Optanon	script	225 kB	30 ms
Facebook	script	218 kB	140 ms
TikTok	script	170 kB	81 ms
Snapchat		26.4 kB	11 ms
All 14		1.41 MB	669 ms

Entity

Transfer

Size

Main thread Simulated

Google Tag Manager

script

686 kB

360 ms

Optanon

script

225 kB

30 ms

Facebook

script

218 kB

140 ms

TikTok

script

170 kB

81 ms

Snapchat

26.4 kB

11 ms

All 14

1.41 MB

669 ms

Without JavaScript

This page is client rendered.

Nothing was painted until the scripts ran. This is a web performance and robustness issue!

The same load, photographed twice at 412×823: once with scripts disabled, once as rendered.

23.5% of pixels differ — parts of the page change. A shifted layout counts as difference, so a <noscript> banner alone can account for a large figure.

Page health

Metric	Value	Change / range
Main Thread Work	35.43 s	↑ +15817 ms (+80.7%) significant 7.64 s – 35.43 s
Long Tasks	20	→ no change 18 – 20
DOM Elements	1,151	→ no change 1,117 – 1,260
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports)	46	↓ -3 (-6.1%) significant 46 – 103
A11y Failures	4	→ no change 4 – 5
A11y Failing Nodes	9	→ no change 9 – 76

Metric

Value

Change / range

Trend

Main Thread Work

35.43 s

↑ +15817 ms (+80.7%) significant 7.64 s – 35.43 s

Long Tasks

→ no change 18 – 20

DOM Elements

1,151

→ no change 1,117 – 1,260

Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports)

↓ -3 (-6.1%) significant 46 – 103

A11y Failures

→ no change 4 – 5

A11y Failing Nodes

→ no change 9 – 76

Main thread work

Task	Share	Duration Simulated
script evaluation	40%	14.14 s
other	29%	10.19 s
paint composite render	18%	6.54 s
style layout	9%	3.02 s
script parse compile	3%	1.03 s
garbage collection	1%	409 ms
parse HTML	0%	98 ms
Total		35.43 s

Task

Time

Duration Simulated

script evaluation

40%

14.14 s

other

29%

10.19 s

paint composite render

18%

6.54 s

style layout

3.02 s

script parse compile

1.03 s

garbage collection

409 ms

parse HTML

98 ms

Total

35.43 s

Axe violations axe-core 4.13.0, full rule set

46 violating nodes across 5 rules, 1205 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

moderate region — All page content should be contained by landmarks 37 nodes

Offending elements (5 of 37)

.mb-12

<div class="mx-auto mb-12 max-w-3xl text-center sm:mb-20">

a[data-track="home.product.chat"]

<a data-track="home.product.chat" class="bg-card group/card relative flex h-[220px] overflow-hidden rounded-2xl sm:h-[280px] sm:col-span-2" href="/grok">

.py-2.gap-3.px-3

<div class="flex items-center gap-3 px-3 py-2">

.overflow-x-hidden > div:nth-child(1)

<div style="opacity: 1; transform: none;">

.overflow-x-hidden > div:nth-child(2) > div > span:nth-child(2)

<span style="font-family:var(--font-geist-mono), ui-monospace, SFMono-Regular, Menlo, monospace;-webkit-font-smoothing:antialiased;font-variant-numeric:tabular-nums;letter-spacing:-0.01em;color:var(-…

serious color-contrast — Elements must meet minimum color contrast ratio thresholds 6 nodes

Offending elements (5 of 6)

.bg-sunset\/10

<span class="bg-sunset/10 text-sunset inline-flex items-center rounded-full px-2 py-[3px] text-[11px] font-medium leading-none">New</span>

div:nth-child(1) > .mt-0\.5.text-primary\/30

<p class="text-primary/30 mt-0.5">API calls per day</p>

div:nth-child(2) > .mt-0\.5.text-primary\/30

<p class="text-primary/30 mt-0.5">Median latency</p>

div:nth-child(3) > .mt-0\.5.text-primary\/30

<p class="text-primary/30 mt-0.5">Model families</p>

.z-\[1\].text-secondary.py-1\.5:nth-child(5)

<button type="button" class="relative z-[1] inline-flex shrink-0 items-center justify-center rounded-full px-3 py-1.5 text-sm font-medium transition-colors text-secondary hover:text-primary">cURL</bu…

critical button-name — Buttons must have discernible text 1 node
Offending element
1. .aspect-square
```
<button type="button" class="relative isolate inl..." data-fill="soft">
```
moderate meta-viewport — Zooming and scaling must not be disabled 1 node
Offending element
1. meta[name="viewport"]
```
<meta name="viewport" content="width=device-width, height=device-height, initial-scale=1, maximum-scale=1">
```
serious scrollable-region-focusable — Scrollable region must have keyboard access 1 node
Offending element
1. .overflow-x-hidden
```
<div class="flex-1 overflow-y-auto overflow-x-hidden" style="scrollbar-width:none">
```

Accessibility failures 4 of 32 audits

color-contrast — Background and foreground colors do not have a sufficient contrast ratio. 6 nodes
button-name — Buttons do not have an accessible name 1 node
meta-viewport — `[user-scalable="no"]` is used in the `<meta name="viewport">` element or the `[maximum-scale]` attribute is less than 5. 1 node
label-content-name-mismatch — Elements with visible text labels do not have matching accessible names. 1 node

Best Practices failures 4 of 19 audits

deprecations — Uses deprecated APIs 2 items
third-party-cookies — Uses third-party cookies 27 items
errors-in-console — Browser errors were logged to the console 4 items
inspector-issues — Issues were logged in the `Issues` panel in Chrome Devtools 2 items

SEO failures 1 of 10 audits

link-text — Links do not have descriptive text 1 item

Hygiene

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h2 4 console errors

Measurement log

Field history 25 weeks

Weekly p75 from the CrUX History API, backfilled in a single request.

Week ending	LCP	INP	CLS	FCP	TTFB
2026-10-10	5.93 s	536 ms	0	2.17 s	1.04 s
2026-10-03	5.96 s	527 ms	0	2.19 s	1.07 s
2026-09-26	5.99 s	532 ms	0.010	2.23 s	1.08 s
2026-09-19	6.03 s	553 ms	0.010	2.27 s	1.10 s
2026-09-12	6.02 s	561 ms	0.010	2.28 s	1.10 s
2026-09-05	5.94 s	574 ms	0.010	2.28 s	1.09 s
2026-08-29	5.74 s	572 ms	0.010	2.26 s	1.07 s
2026-08-22	5.47 s	533 ms	0.010	2.22 s	1.05 s
2026-08-15	5.23 s	505 ms	0.010	2.19 s	1.05 s
2026-08-08	5.09 s	479 ms	0.010	2.18 s	1.09 s
2026-08-01	5.05 s	448 ms	0.010	2.17 s	1.13 s
2026-07-25	4.95 s	414 ms	0.010	2.20 s	1.17 s

Week ending

LCP

INP

CLS

FCP

TTFB

2026-10-10

5.93 s

536 ms

2.17 s

1.04 s

2026-10-03

5.96 s

527 ms

2.19 s

1.07 s

2026-09-26

5.99 s

532 ms

0.010

2.23 s

1.08 s

2026-09-19

6.03 s

553 ms

0.010

2.27 s

1.10 s

2026-09-12

6.02 s

561 ms

0.010

2.28 s

1.10 s

2026-09-05

5.94 s

574 ms

0.010

2.28 s

1.09 s

2026-08-29

5.74 s

572 ms

0.010

2.26 s

1.07 s

2026-08-22

5.47 s

533 ms

0.010

2.22 s

1.05 s

2026-08-15

5.23 s

505 ms

0.010

2.19 s

1.05 s

2026-08-08

5.09 s

479 ms

0.010

2.18 s

1.09 s

2026-08-01

5.05 s

448 ms

0.010

2.17 s

1.13 s

2026-07-25

4.95 s

414 ms

0.010

2.20 s

1.17 s

Runs

Every stored run for this URL, newest first.

When	Perf	LCP	CLS	TBT	Weight	Runs	Spread	Bench	Took	Archive
Oct 16, 2026, 5:38 AM UTC	35	20.56 s	0.002	4.23 s	3.03 MB	3/3	±1	2,462 -1%	396.1s	Wayback
Oct 14, 2026, 12:55 AM UTC	38	19.82 s	0.001	2.29 s	2.84 MB	3/3	±3	4,268 +72%	371.6s	Wayback
Oct 8, 2026, 11:18 PM UTC	36	23.71 s	0	4.34 s	3.64 MB	3/3	±0	2,491 0%	108.4s	Wayback
Oct 6, 2026, 7:04 PM UTC	36	24.02 s	0	3.30 s	3.80 MB	3/3	±1	3,313 +33%	99.3s	Wayback
Oct 3, 2026, 6:00 PM UTC	36	21.92 s	0	4.54 s	3.62 MB	3/3	±0	2,506 +1%	110.2s	Wayback
Sep 30, 2026, 8:37 PM UTC	36	22.74 s	0	4.66 s	3.79 MB	3/3	±1	2,501 +1%	108.5s	Wayback
Sep 28, 2026, 6:37 PM UTC	39	18.76 s	0	2.75 s	3.52 MB	3/3	±1	2,353 -5%	88.9s	Wayback
Sep 25, 2026, 12:38 AM UTC	37	24.17 s	0	3.15 s	4.14 MB	3/3	±2	3,049 +23%	101.6s	Wayback
Sep 23, 2026, 12:05 AM UTC	39	18.62 s	0	2.97 s	3.52 MB	3/3	±1	2,444 -2%	93.2s	Wayback
Sep 20, 2026, 11:15 PM UTC	37	23.66 s	0	4.35 s	4.18 MB	3/3	±0	2,498 0%	109.8s	Wayback
Sep 18, 2026, 1:54 PM UTC	38	17.46 s	0	2.81 s	2.95 MB	3/3	±1	2,419 -3%	107.6s	Wayback
Sep 16, 2026, 9:35 AM UTC	38	17.18 s	0	2.86 s	2.90 MB	3/3	±0	2,492 0%	94.3s	Wayback
Sep 14, 2026, 6:18 AM UTC	36	23.65 s	0.010	3.78 s	3.74 MB	3/3	±6	2,578 +4%	103.7s	Wayback
Sep 11, 2026, 11:23 PM UTC	36	22.89 s	0.010	4.00 s	3.75 MB	3/3	±1	2,498 0%	219.4s	Wayback
Sep 9, 2026, 8:29 PM UTC	38	23.35 s	0.010	2.37 s	3.73 MB	3/3	±8	3,405 +37%	40.9s	Wayback
Sep 7, 2026, 7:03 PM UTC	36	23.17 s	0.010	3.96 s	3.72 MB	3/3	±1	2,342 -6%	47.4s	Wayback
Sep 5, 2026, 12:32 PM UTC	37	23.23 s	0.010	3.40 s	3.59 MB	3/3	±0	2,204 -11%	47.8s	Wayback
Sep 4, 2026, 1:07 AM UTC	37	20.36 s	0.010	2.84 s	3.34 MB	3/3	±1	2,351 -5%	47.1s	Wayback
Sep 2, 2026, 11:18 PM UTC	39	18.49 s	0	1.82 s	3.16 MB	3/3	±7	2,905 +17%	43.5s	Wayback
Sep 1, 2026, 10:57 PM UTC	35	23.81 s	0	3.95 s	3.59 MB	3/3	±1	2,417 -3%	105.6s	Wayback
Aug 31, 2026, 9:09 PM UTC	36	20.91 s	0	3.20 s	3.61 MB	3/3	±1	2,455 -1%	55.1s	Wayback

When

Scores

Perf

LCP

CLS

TBT

Weight

Runs

Spread

Bench

Took

Stack

Filmstrip LAB 🐢 Throttled

Lighthouse Scores LAB 🤖 Simulated

Metrics LAB FIELD

LCP Subparts LAB 🐢 Throttled

LCP LAB 🤖 Simulated vs LCP FIELD

Page weight

By resource type

Third parties 14 entities

Without JavaScript

Page health

Main thread work

Axe violations axe-core 4.13.0, full rule set

Accessibility failures 4 of 32 audits

Best Practices failures 4 of 19 audits

SEO failures 1 of 10 audits

Hygiene

Measurement log

Field history 25 weeks

Runs

Filmstrip LAB Throttled

Lighthouse Scores LAB Simulated

LCP Subparts LAB Throttled

LCP LAB Simulated vs LCP FIELD