Two months of π0.5 finetuning ablations: diversity beats raw scaling, 98% success
philfung · x · 2026-09-24
The team shares all ablation results from two months of finetuning π0.5 on a real manufacturing task, reaching 98% policy success and publishing every run including failures. Key takeaways: 5x data only lifted success from 63% to 76% (scaling was the weakest lever), while spreading the same 4 hours of data across five scenes beat concentrated collection—diversity extracts more from identical data budgets.
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