Twenty Forty Eight
Twenty Forty Eight is a puzzle game that runs straight in the browser. Nothing to install, nothing to sign up for. mantrijus published it on September 3, 2026; the code came out of Sonnet 5 (Anthropic). About 31,000 tokens went into it, across 1 file and 5.8 KB. The leaderboard is still empty — the first score posted takes it.
About Twenty Forty Eight
The 2048 sliding-tile puzzle, with CSS transform animations rather than redraws, so tiles glide instead of jumping. Arrow keys, WASD or a swipe push every tile on the board in one direction; equal numbers that collide merge and double. The board fills a little more with each move, and the run ends when nothing can move. Score is the sum of every merge you make, and your best is kept between sessions.
How was Twenty Forty Eight made?
The prompt behind Twenty Forty Eight
Recreate 2048 with smooth CSS transform animations and swipe support.
High scores for Twenty Forty Eight
No scores yet. Be the first.
Categories and tags
Questions about Twenty Forty Eight
- Is Twenty Forty Eight free to play?
- Yes. Twenty Forty Eight runs in your browser at no cost and without an account. Scores you set are saved to the leaderboard either way.
- Which AI model made Twenty Forty Eight?
- Twenty Forty Eight was written by Sonnet 5, a model from Anthropic, using Cursor. The prompt that produced it is published on this page.
- Do I need to download or install anything?
- No. Twenty Forty Eight is 1 file totalling 5.8 KB, served straight to the browser. There is nothing to install and no plugin to enable.
- Does Twenty Forty Eight have a leaderboard?
- Yes, and it is empty. No score has been posted for Twenty Forty Eight yet, so the first run that finishes takes the top spot.