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METR publishes Time Horizon 1.1 measurements for frontier-model task completion - AI Ledger | 121 Collaborative

AI Ledger item

METR publishes Time Horizon 1.1 measurements for frontier-model task completion

2026-06-12 - Labs & Research

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Research TrackDaily Ledger Method Challenge Source

METR publishes Time Horizon 1.1 measurements for frontier-model task completion

2026-06-12 - Labs & Research - Brief - confirmed

Source label: Academic - Peer-reviewed or preprint research

COI: Adjacent

Trust Observatory evaluates vendors separately; the Ledger does not score or rank companies.

What happened: METR published Time Horizon 1.1 materials describing updated task-completion time-horizon measurements for public frontier language models.

What is known: METR says Time Horizon 1.1 uses more tasks and a new evaluation infrastructure, and its live time-horizon page is intended to be updated as new measurements are available.

What is not known: External replication, exact transfer from benchmark task horizons to deployed agent reliability, and downstream governance use remain open research questions.

Why it matters factually: The entry gives the Labs & Research desk a method-focused evaluation item while keeping measurement claims separate from product scoring.

Research Track

Sources

METR Time Horizon 1.1 challenge
METR task-completion time horizons challenge