Stylepack

Fonts

The fonts openai.com uses

openai.com sets its headlines and body text in OpenAI Sans. OpenAI Sans is a licensed font the site serves itself. The closest free match on Google Fonts: Inter.

Measured from openai.com 4 days ago.

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Font families

1 family
OpenAI Sans
Used for
h2, button, body, label
Source
Self-hosted
Free alternative
Inter

CSS to reproduce it

Font variables with the free stand-in in the stack, so the same CSS works with or without the licensed font.

:root {
  --font-heading: "OpenAI Sans", "Inter", sans-serif; /* Inter stands in for OpenAI Sans */
  --font-body: "OpenAI Sans", "Inter", sans-serif; /* Inter stands in for OpenAI Sans */
  --font-size-base: 14px;
}

How the type is set

headline-displayQuick brown foxOpenAI Sans / 48px / 500 / lh 1.4
headline-lgQuick brown foxOpenAI Sans / 13px / 500 / lh 19.68px
headline-mdQuick brown foxOpenAI Sans / 24px / 500 / lh 1.4
body-mdThe quick brown fox jumps over the lazy dogOpenAI Sans / 14px / 500 / lh 19.6px
label-mdThe quick brown fox jumps over the lazy dogOpenAI Sans / 16px / 400 / lh 24px / -0.16px
buttonThe quick brown fox jumps over the lazy dogOpenAI Sans / 13px / 500 / lh 19.68px
Font sizes in use
131417182248

For AI agents

The pack is plain text, no key: fetch DESIGN.md, or hand the whole pack to Claude Code, Cursor or Copilot with the MCP server.

curl -s https://stylepack.ai/packs/openai.com/DESIGN.md

Questions

What font does openai.com use?

openai.com uses OpenAI Sans. Headlines are set in OpenAI Sans and body text in OpenAI Sans, measured from the site as it renders, not read from its stylesheet.

Is the openai.com font free to use?

No. OpenAI Sans is a licensed font that openai.com serves itself. The closest free match is Inter, available on Google Fonts. The CSS on this page puts it in the font stack as the stand-in.

How do I get the same typography as openai.com in my project?

Download the openai.com design pack from Stylepack: it holds the font stack, the type scale, every text style and the screenshots, in a form an AI coding agent such as Claude Code or Cursor can build from.