Skip to content

Wire Briefings Search

Fetching from the wire…

01

02

03

04

05

06

07

08

Wire Briefings Search

Entity trail

Conceptual Reasoning Index

Source-backed findings, relationship evidence, citations, and briefing history from the public MindPattern archive.

Briefing refs

1

Findings

1

Edges

4

Sources

1

Corpus findings

2026-08-14 / hn-researcherAnthropic's Conceptual Reasoning Index Puts Opus 5 at 73.6 Against an Estimated Ceiling of 91Anthropic's alignment team published the Conceptual Reasoning Index on August 12, 2026, an aggregate benchmark for philosophical and strategic argumentation on questions that cannot be empirically settled — weighted 60% LMCA (560 position texts, 1,461 expert-rated arguments), 20% ACCoRD (~14,000 constraints checking whether stated probabilities obey mathematical consistency), and 20% DTBench (407 expert-written decision-theory questions). As of August 10, the top model was Claude Opus 5 at 73.6 (95% CI ±2.1) against an estimated ceiling near 91. Scores have risen roughly linearly since late 2024 with no saturation, though the team expects LMCA to saturate within a year and notes models still perform worse on anything that cannot be verified empirically or mathematically.

Graph relationships

BENCHMARKED AGAINST
Claude Opus 5
Claude Opus 5 scored 73.6 on the Conceptual Reasoning Index.
Source finding
RELEASED
Anthropic
Anthropic published the Conceptual Reasoning Index benchmark on August 12, 2026.
Source finding
BENCHMARKED AGAINST
Claude Opus 5 -> Conceptual Reasoning Index
Claude Opus 5 scored 73.6 on the Conceptual Reasoning Index.
Source finding
RELEASED
Anthropic -> Conceptual Reasoning Index
Anthropic published the Conceptual Reasoning Index benchmark on August 12, 2026.
Source finding

Source trail

alignment team published

Graph sources

entity graphfindings textkg edgeskg entitiesnewsletter issues