Source: https://seerepo.com/compare/openai/codex/vs/tailwindlabs/tailwindcss
Markdown source: https://seerepo.com/compare/openai/codex/vs/tailwindlabs/tailwindcss.md
Description: codex and tailwindcss share 3 technologies: tracing, tracing-subscriber, and log. codex is written in Rust and tailwindcss in TypeScript.

# codex vs tailwindcss

codex and tailwindcss share 3 technologies: tracing, tracing-subscriber, and log. codex is written in Rust and tailwindcss in TypeScript.

- [openai/codex](https://seerepo.com/r/openai/codex): Lightweight coding agent that runs in your terminal
- [tailwindlabs/tailwindcss](https://seerepo.com/r/tailwindlabs/tailwindcss): A utility-first CSS framework for rapid UI development.

## What they share and what sets them apart

- In common: tracing, tracing-subscriber, log
- Only in codex: axum, lru, SQLite, Sentry, Tokio, tower, objc2-app-kit, objc2-foundation, Ratatui, crossterm, keyring, hmac, rmcp, png, image, pulldown-cmark, zip, schemars, Pydantic, tracing-appender
- Only in tailwindcss: H3, Vite, lightningcss, PostCSS, postcss-import, tailwindcss, postcss-selector-parser

## Side by side

| | codex | tailwindcss |
|---|---|---|
| Size | 2,320,674 lines written, 4,216 code files | 165,694 lines written, 231 code files |
| Who writes it | 2.8% of its commits signed by AI. With Codex, Claude Code, and GitHub Copilot | 0.2% of its commits signed by AI. With Claude Code, CodeRabbit, and Codex |
| Activity | Last push November 4, 2026, 13,099 commits, 133,103 stars | Last push November 2, 2026, 6,086 commits, 98,062 stars |
| Tests | 2,448 test files. 51.6% of its code files have a test that imports them | 137 test files. 36.4% of its code files have a test that imports them |

- Size: Lines written by people and agents, without generated ones; code files, without tests.
- Who writes it: A commit counts as AI's when it carries its signature: a Co-Authored-By line, its author name or the merge of its branch.
- Activity: From GitHub and its history, on the day SeeRepo read it.
- Tests: The files that test the code, and the share of code files a test imports.

## Frequently asked questions

### Which is bigger, codex or tailwindcss?

codex, with 2,320,674 lines written; tailwindcss has 165,694.

The proof: [openai/codex's code at commit 021fccb](https://github.com/openai/codex/tree/021fccb046508938c4754982efccfb51d6e8356e)

### Which has more GitHub stars, codex or tailwindcss?

codex, with 133,103 stars; tailwindcss has 98,062.

The proof: [openai/codex on GitHub](https://github.com/openai/codex)

### Which has more tests, codex or tailwindcss?

codex, with 2,448 test files; tailwindcss has 137.

The proof: [openai/codex's code at commit 021fccb](https://github.com/openai/codex/tree/021fccb046508938c4754982efccfb51d6e8356e)

### Which was updated more recently, codex or tailwindcss?

codex: its last push was on November 4, 2026, and tailwindcss's on November 2, 2026.

The proof: [openai/codex's commits on GitHub](https://github.com/openai/codex/commits)

### Which has more commits signed by AI, codex or tailwindcss?

codex: an AI signed 2.8% of its commits, with Codex, Claude Code, and GitHub Copilot; in tailwindcss, 0.2%.

The proof: [the commits each tool signed in openai/codex](https://seerepo.com/r/openai/codex/ai)

## Sources

- openai/codex: Read on November 4, 2026, at commit 021fccb (https://github.com/openai/codex/tree/021fccb046508938c4754982efccfb51d6e8356e)
- tailwindlabs/tailwindcss: Read on November 4, 2026, at commit 2626ae6 (https://github.com/tailwindlabs/tailwindcss/tree/2626ae6ceddf36069ab6d55c53a5857c1e2e360a)

## What is your repo built with?

Any public repo, with no account: https://seerepo.com/r/owner/repo/built, with the owner and name it has on GitHub.