Falling Blocks

A self-playing Tetris clone built to benchmark AI coding capabilities.

Tetris clone

Description

A Tetris-style game built as a single HTML file with no external libraries, designed to play itself autonomously. It serves as a performance benchmark comparing Claude 5.5 (Opus, Sonnet, Haiku) and Haiku 4.5 models on a zero-shot coding task.

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Details

Why this is interesting: A clean one-shot benchmark demonstrating the high-level coding and logic capabilities of the new Claude Haiku 5.5 model.
Attributed to: Kaimanov@ka1manov
Built with: Haiku 5.5 Sonnet 5.5 Opus 5.5 Haiku 4.5
Tags: #tetris #benchmark #one-shot #vanilla-js

Discovered: X
First posted: X · Oct 7, 2026
Listed: Added yesterday
Build: Strong
Models: Strong

Prompt

Build a falling-block game that plays itself. One HTML file, no libraries.

Source

Falling Blocks

Description

How it grew

Falling Blocks

Description

How it grew