The October inflection point for vibe game development
Why CEREBRO kept it
Simon Willison on agent-built games; vibe-coding capability signal.
The text below is an automated extraction of the article at https://simonwillison.net/2026/Oct/28/vibe-game-development/, stored verbatim in the public cerebro-vault repository. Copyright remains with the original publisher (simonwillison.net).
<p>I've written before about how November 2025 was <a href="https://simonwillison.net/tags/november-2025-inflection/">an inflection point for coding agents</a> - the point where Opus 4.5 and GPT-5.1 crossed a tipping point that meant their respective coding agents became reliable daily drivers for software engineers. I think we've reached a new inflection point in October 2026, and this time it's for <strong>vibe coding computer games</strong>.</p>
<ul> <li><a href="https://simonwillison.net/2026/Oct/28/vibe-game-development/#tree-appreciator">Tree Appreciator</a></li> <li><a href="https:
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