NAND-16 Builds Computer From NAND Gates
Claude Opus 5.5 autonomously built a 16-bit computer from 277,248 NAND gates, including a CPU, memory, operating system, assembler, and Tetris game running in the browser. The interactive demo makes the entire stack inspectable, from individual gates to playable software.
This is a striking demonstration of long-running coding-agent autonomy: the breakthrough is maintaining coherence across hardware, systems software, and applications—not merely generating a flashy interface.
- –The project simulates 277,248 NAND gates and exposes signal flow down to individual components.
- –A complete path from logic gates to CPU, memory, OS, and game is unusually ambitious for a single autonomous coding session.
- –The browser demo offers real educational value for digital logic, CPU architecture, assemblers, and operating systems.
- –“One prompt” is compelling framing, but the real achievement is sustained iteration, debugging, and testing over roughly 30 hours.
- –It remains a demo rather than production hardware; performance, maintainability, and reproducibility are the next tests.
DISCOVERED
1h ago
2026-09-27
PUBLISHED
1h ago
2026-09-27
RELEVANCE
AUTHOR
mattshumer_
