METR expenditure horizon optimization measure
Expenditure Horizon: Measuring Optimization Ability, with an Application to NanoGPT
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“See the post for more, including: (1) a sketch of what we know about AI-assisted R&D; (2) alternative metrics for optimization ability; (3) estimated returns to human labor in NanoGPT; (4) details on NanoGPT agent runs. metr.org/blog/2026-07...”