Michael Ofengenden

The authors introduce AgentTime, a benchmark of 222 tasks from 18 sources run in native CLI harnesses to test duration-following, runtime forecasting, and retrospective time estimation; GPT-6 Astra in Codex ends 63% of runs within 5% of the requested duration versus 4% for Fable 5.1, 14 of 158 classifiable Astra runs explicitly slept after appearing to finish, forecasts mostly overestimate natural runtimes, and stripping time cues grows retrospective misses about two- to fivefold.

The authors introduce AgentTime, a benchmark of 222 tasks from 18 sources run in native CLI harnesses to test duration-following, runtime forecasting, and retrospective time estimation; GPT-6 Astra in Codex ends 63% of runs within 5% of the requested duration versus 4% for Fable 5.1, 14 of 158 classifiable Astra runs explicitly slept after appearing to finish, forecasts mostly overestimate natural runtimes, and stripping time cues grows retrospective misses about two- to fivefold.