Agent fixes looping Qwen3.5 0.8B by editing weights — no training, no gradients

VictorSanh · x · 2026-11-12

The Beaker team pointed their autonomous agent-improver at a looping Qwen3.5 0.8B (93% fail rate on MATH-500, stuck generating "Wait"). Without ever running the model or using gradients, Beaker hypothesized, validated and hill-climbed its way to a weight edit toning down that tendency — a case study in viral "weight-space programming." Victor Sanh endorsed it as a real look behind the hype.

Related event: AI agent fixes broken model by editing weights directly, boosting MATH-500 from 7.4% to 37.4%(4 posts)→

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