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OpenAI vs spectr.pm

Two design systems side by side, measured from the live sites — colour, type, shape, depth, components, states and responsive behaviour.

OpenAI: OpenAI | Research & Deployment · Above the fold
OpenAI
openai.com· read 2026-11-03
spectr.pm: Spectr - AI Product Ops: Meetings to PRDs, Specs & Stories · Above the fold
spectr.pm
spectr.pm· read 2026-10-14

Worth knowing

  • Extraction depth differs: 2 pages against 6. The deeper read will usually show more tokens.

Ground and ink

Each side painted in its own measured canvas, ink, muted and primary roles.

OpenAI

Heading on canvas

Body copy in the measured muted role.

Primary action
21:1 ink on canvas

spectr.pm

Heading on canvas

Body copy in the measured muted role.

Primary action
18.6:1 ink on canvas

Palette

Named roles first, then every colour measured without one.

OpenAI

  • canvas#FFFFFF
  • ink#000000
  • primary#000000
  • on-primary#FFFFFF

3 more, no measured role

spectr.pm

  • canvas#0D0D0D
  • surface#171717
  • ink#FAFAFA
  • hairline#2E2E2E
  • primary#894DEF
  • on-primary#FAFAFA

10 more, no measured role

Type scale

Set at the measured size, weight, tracking and leading. Brand typefaces are not loaded, so the metrics are real and the letterforms are not.

OpenAI

h1

64px · 500 · shown smaller

h2

48px · 500 · shown smaller

h3

30px · 500

heading

28px · 600

heading

22px · 500

body

18px · 500

label

17px · 400

spectr.pm

hero-display

288px · 900 · shown smaller

display

280px · 900 · shown smaller

display

252px · 900 · shown smaller

display

200px · 900 · shown smaller

display

132px · 800 · shown smaller

display

99px · 600 · shown smaller

h2

92px · 800 · shown smaller

Corners

Drawn at the measured radii.

OpenAI

0px

pill

spectr.pm

0px

Spacing

One shared scale across both sides, so the bars are directly comparable.

OpenAI

4
8
12
16
20
24
32
48

spectr.pm

4
8
12
16
24
28
32
40

Depth

Shadows cast on each side's own ground.

OpenAI

sm

md

spectr.pm

sm

Buttons

Rendered from the measured computed styles.

OpenAI

primaryprimary-smsecondaryicon

spectr.pm

primaryfilledprimary-smtext

The measured values behind the panels above.

OpenAIspectr.pm

At a glance

Ground — these differLightDark
Corners — these differPillSharp
Display size — these differ64px288px
Spacing base4px4px
Accent colours — these differ08
Type families — these differ12
Ink on canvas — these differ21.0:118.6:1
Components — these differ1311

Colour roles

primary — these differ#000000#894DEF
canvas — these differ#FFFFFF#0D0D0D
surface—#171717
ink — these differ#000000#FAFAFA
body—#B8B8B8
hairline—#2E2E2E
on-primary — these differ#FFFFFF#FAFAFA

Full palette

Every colour each extraction kept, including the ones with no measured role.

All colours — these differ#000000#FFFFFF#F1F1F1#E5E7EB#333333#1F1F1F#894DEF#A273F2#14532D#78350F#166534#4ADE80#92400E#FBBF24#0D0D0D#171717#FAFAFA#B8B8B8#2E2E2E#6B6B6B#000000#262626
Semantic——

Typography

Families — these differOpenAI SansInter-e4c28016845df4efJetBrains Mono-33799697913f1f09
hero-display—288px · 900 · 288px · -11.52px · uppercase · Inter-e4c28016845df4ef
display—132px · 800 · 198px · -2.64px · Inter-e4c28016845df4ef
h1 — these differ64px · 500 · 64px · -1.92px · OpenAI Sans72px · 800 · 72px · -2.52px · Inter-e4c28016845df4ef
h2 — these differ48px · 500 · 55.68px · -1.44px · OpenAI Sans44px · 800 · 46.2px · -1.32px · Inter-e4c28016845df4ef
h3 — these differ30px · 500 · 39.6px · -0.3px · OpenAI Sans19px · 600 · 28.5px · 0px · Inter-e4c28016845df4ef
heading — these differ22px · 500 · 27.72px · -0.22px · OpenAI Sans16px · 600 · 24px · 0px · Inter-e4c28016845df4ef
label17px · 400 · 27.999px · -0.17px · OpenAI Sans—
input16px · 400 · 24px · -0.16px · OpenAI Sans—
list-item—16px · 500 · 24px · 0px · Inter-e4c28016845df4ef
button — these differ14px · 500 · 14px · 0px · OpenAI Sans15px · 600 · 22.5px · 0px · Inter-e4c28016845df4ef
body — these differ14px · 500 · 19.6px · 0px · OpenAI Sans15px · 500 · 23.25px · 0px · Inter-e4c28016845df4ef
link — these differ13px · 500 · 19.68px · 0px · OpenAI Sans14px · 500 · 20px · 0px · Inter-e4c28016845df4ef
code—13px · 600 · 19.5px · 1.82px · uppercase · JetBrains Mono-33799697913f1f09
caption—12px · 500 · 16.5px · 0px · Inter-e4c28016845df4ef

Shape and rhythm

Radius — these differ0px9999px0px
Spacing — these differ4px8px12px16px20px24px32px48px64px80px112px120px4px8px12px16px24px28px32px40px44px48px64px144px
Border widths1px1px

Depth

Strategy — these differlayered-microsingle-tier
Shadows — these differrgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0.04) 0px 3px 6px 0px, rgba(0, 0, 0, 0.04) 0px 4px 80px 8px, rgba(0, 0, 0, 0.62) 0px 0px 1px 0pxrgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0.02) 0px 4px 6px 0px, rgba(0, 0, 0, 0.05) 0px 0px 2px 0pxrgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0.1) 0px 10px 15px -3px, rgba(0, 0, 0, 0.1) 0px 4px 6px -4px
Gradients——
Opacity — these differ0.970.031.000.700.900.940.650.36
Z-index — these differbase 1dropdown 10dropdown 40dropdown 50dropdown 51dropdown 52dropdown 56dropdown 57dropdown 10dropdown 50

Components

Sharedbutton-primarybutton-primary-smcardnavigationfooterlinkbutton-primarybutton-primary-smcardnavigationfooterlink
Only here — these differbutton-secondarybutton-iconbutton-outlinebutton-outline-2navigation-2footer-2link-2button-filledbutton-textbutton-text-2card-lglink-sm
Signature——

Interaction states

Read from each site's own stylesheets. An empty side means they were cross-origin and unreadable.

Measured — these differother:hoverother:focus-visiblelink:hoverlink:focus-visibleother:disabledbutton:focus-visiblebutton:hovercard:hovernav:focus-visiblecard:focus-visibleother:focus-visibleinput:hoverother:hovercard:hoverother:focusother:disablednav:hovernav:focus-visible

Responsive

Breakpoints — these differ375→327px · 3col768→704px · 3col1024→768px · 6col1280→768px · 6col1440→768px · 3col375→343px · 6col768→704px · 3col1024→960px · 5col1280→1216px · 5col1440→1376px · 5col

Themes

Measured on the live site, not derived.

SupportSingle themeSingle theme

How this was measured

Differences here are ours, not the brands'.

Pages read — these differ26
Extracted — these differ2026-11-032026-10-14
Stylesheets — these differPartly blockedReadable
Roles unassigned — these differ310

Measured by DesignMD from the live sites. Compare two others. Generate a DESIGN.md for your own site.