Equation 11 · Part 2 · The Hardest Unsolved Problems in AI Agent Evaluation and Reliability
subscript
subscript
What this part means
The lower label selects a particular version, component, or indexed member of the quantity. For example, x₀ and xₜ can be values at different positions.
Its job in the formula
A subscript distinguishes a version, component, step, or member of a quantity. It does not automatically mean multiplication.
Full expression→subscript→Article meaning
The passage around this formula
The clearest empirical trend in this area comes from METR, which measured how the length of software tasks that leading agents can complete at even odds has changed over time, expressed as a time horizon - the length of task, in expert-human time, that an agent completes successfully half the time. Kwa and colleagues report that this time horizon has been doubling roughly every seven months since 2019, which can be written as an empirical fit
Learn the underlying idea
A subscript is a label attached below a symbol. It often selects a time step, component, category, or member of a sequence.
Open the illustrated subscripts: which member of a family? guide →
Sources cited in the article section
- [5] Underspecification Presents Challenges for Credibility in Modern Machine Learning ↗
- [1] AI Agents That Matter ↗
- [6] WebArena: A Realistic Web Environment for Building Autonomous Agents ↗
- [4] Measuring AI Ability to Complete Long Software Tasks ↗
These citations provide research context; check each source for the exact claim it supports.