UnifyBench

RankingOfficeQA

OfficeQA

Data updated 24 Sept 2026

Bucket
Agentic
Unit
percent
Direction
Higher is better
Version
—
Display harness
Claude Fable 5.1 and Claude Mythos 5.1 System Card
Board
https://www.anthropic.com/claude-fable-5-1-mythos-5-1-system-card

Compare published benchmark results with category weights →

Models

Published configurations retain their source and harness labels. Missing results remain unknown.

1–3 of 3 entries

ModelScoreHarnessEvidenceSource-recorded date
Claude Fable 5.1Anthropic80.2%
Reported settings & source

Extracted-text Treasury corpus in sandbox; code execution; production Messages API with safeguards/fallback;128koutput cap. Pro133questions.

Fable is the safeguarded deployed configuration; selected tasks may use disclosed Opus fallback, except evaluations explicitly counting safety blocks as failures.

Claude Fable 5.1 and Claude Mythos 5.1 System Card · 8.15.1 · reviewed 2026-09-24

Claude Fable 5.1 and Claude Mythos 5.1 System Cardlab self-report2026-09-24
Claude Opus 5Anthropic78.1%
Reported settings & source

Extracted-text Treasury corpus in sandbox; code execution; production Messages API with safeguards/fallback;128koutput cap. Pro133questions.

Claude Fable 5.1 and Claude Mythos 5.1 System Card · 8.15.1 · reviewed 2026-09-24

Claude Fable 5.1 and Claude Mythos 5.1 System Cardlab self-report2026-09-24
Claude Opus 5.5Anthropic78.9%
Reported settings & source

Agentic extracted-text Treasury Bulletin corpus with code execution; max effort; mean of five runs.

Provider-published lab self-report from the Claude Opus 5.5 system card (SHA256 7311c9c6bbb16d012f1c12c7418b05949fcf7ae3e30d2c40f22050074b2a7378). Not an independent board.

Comparison limit: Provider-published lab self-report. Shown as a labeled claim and not admitted as a matched board comparison.

Claude Opus 5.5 System Card · section 8.14.1 · reviewed 2026-09-22

Claude Opus 5.5 System Cardlab self-report2026-09-22