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Research2026-08-14 · source-backed
arXiv 2608.12984 separates a deterministic librarian ingesting timestamped sources into a trust-tiered ontology from a multi-agent writer composing reports at any cutoff T, reading only evidence with as_of <= T. Across 6,130 sources yielding 555,926 evidence cards, the shared metric ledger eliminated all cross-section contradictions, tier-first selection was correct on 22/22 gold cases versus 9/22 for popularity-first, and replay showed zero look-ahead violations across seven cutoffs. Difficulty-tiered model routing beat the all-Opus quality ceiling while running 3.7x faster than serial.
Each link below shares sources, entities, or timing with this story.
Opus built by Anthropic / Shared entity: Opus / Same source domain / Shared topic / Earlier coverage
Linked by a graph relationship (Opus built by Anthropic); both cover Opus; reported by the same outlet (arxiv.org).
Cursor uses Opus / Shared entity: Opus / Earlier coverage / Tension
Linked by a graph relationship (Cursor uses Opus); both cover Opus; earlier Opus coverage from 2026-07-14.
Opus built by Anthropic / Shared entity: Opus / Earlier coverage / Tension
Linked by a graph relationship (Opus built by Anthropic); both cover Opus; earlier Opus coverage from 2026-06-14.
Cursor uses Opus / Shared entity: Opus / Earlier coverage / Tension
Linked by a graph relationship (Cursor uses Opus); both cover Opus; earlier Opus coverage from 2026-06-01.
Opus built by Anthropic / Shared entity: Opus / Earlier coverage / Tension
Linked by a graph relationship (Opus built by Anthropic); both cover Opus; earlier Opus coverage from 2026-05-09.
Linked by a graph relationship (Opus built by Anthropic); both cover Opus; earlier Opus coverage from 2026-04-23.
Linked by a graph relationship (Opus built by Anthropic); both cover Opus; earlier Opus coverage from 2026-07-10.
Opus built by Anthropic / Shared entity: Opus / Earlier coverage
Linked by a graph relationship (Opus built by Anthropic); both cover Opus; earlier Opus coverage from 2026-08-07.