Simon Willison: October 2026 is the vibe game dev inflection point

Simon Willison argues Claude Opus 5.5 has markedly improved at 3D modeling, music generation and, crucially, game design, making October 2026 an inflection point for vibe-coded games. He built four games he genuinely enjoyed without reading the code, and finds GPT-6 Astra's sense of fun still behind Opus 5.5.

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