RankingFrontierSWE · 2

FrontierSWE · 2

Data updated 22 Sept 2026

Bucket: Supporting evidence
Unit: percent
Direction: Higher is better
Version: 2
Display harness: Claude Opus 5.5 System Card
Board: https://www-cdn.anthropic.com/fc1b44717c85dc068bc6ba5024219938094694bd/Claude%20Opus%205.5%20System%20Card.pdf

The available records have no admitted matched comparison in the capability core. Raw results remain available below.

Models

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

1–1 of 1 entries

Model	Score	Harness	Evidence	Source-recorded date
Claude Opus 5.5Anthropic	62.3% Reported settings & source Proximal agent harness; max reasoning effort; 34 tasks; five trials per task; mean across trials. 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 8.7 · reviewed 2026-09-22	Claude Opus 5.5 System Card	lab self-report	2026-09-22