Benchmark

Artificial Analysis index

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Attribution and reporting linked by this record; links do not imply independent verification.

Welcome to September 24, 2026 (theinnermostloop.substack.com)
Source linked by the September 24 issue (artificialanalysis.ai)

Model comparison index referenced in the Opus 5.5 launch coverage.

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Development timeline

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2026-10-13: Muse Wonder Full scores 56 on the Artificial Analysis index

2026-10-03: Argon reportedly matches Astra at lower cost

2026-10-03: The Intelligence Index peak rises over a year

2026-09-30: Sonnet 5.5's longer output raises reported task costs

2026-09-29: Sonnet 5.5 scores 56 on the Artificial Analysis index

2026-09-24: Opus 5.5 leads the Artificial Analysis index

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Artificial Analysis

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Artificial Analysis index
Innermost Loop KB — secondary record
Reporting date: unknown
KB permalink: https://nicholsn.github.io/innermost-loop-kb/benchmarks/artificial-analysis-index
Attributed sources:
- Welcome to September 24, 2026 — https://theinnermostloop.substack.com/p/welcome-to-september-24-2026
- Source linked by the September 24 issue — https://artificialanalysis.ai/models/claude-opus-5-5
This citation does not imply independent verification of linked-source claims.

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