Muse Spark 1.2 was extensively trained on long-horizon coding tasks including whole-repository generation, large end-to-end projects, and auto-research.

The author notes that Muse Spark 1.2's training included long-horizon coding tasks spanning whole-repository generation and auto-research. ✦ AI generated

The author · Simon Willison's Weblog · 2026-08-05 · original ↗

Muse Spark 1.2 was extensively trained on long-horizon coding tasks, including whole-repository generation, large end-to-end projects, and auto-research.

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