Falling-Block Self-Player

A one-shot self-playing Tetris clone built to benchmark the new Claude Haiku 5.5.

Tetris clone

Description

A single-file HTML game where a falling-block Tetris-like engine plays itself autonomously. The project serves as a one-shot coding benchmark comparing the performance of Claude Haiku 5.5 against Opus 5.5, Sonnet 5.5, and Haiku 4.5, measuring line clears across 50 pieces.

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Details

Why this is interesting: A clean one-shot benchmark comparing the coding performance of the new Haiku 5.5 against the full Claude 5.5 family.
Attributed to: Kaimanov@ka1manov
Built with: Haiku 5.5 Sonnet 5.5 Opus 5.5 Haiku 4.5
Tags: #tetris #benchmark #one-shot #coding

Discovered: X
First posted: X · Oct 7, 2026
Listed: Added 2h ago
Build: Moderate
Models: Strong

Prompt

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

Source

Falling-Block Self-Player

Description

How it grew

Falling-Block Self-Player

Description

How it grew