RankingHumanity’s Last Exam · No tools

Humanity’s Last Exam · No tools

Data updated 8 Oct 2026

Bucket: Hard reasoning
Unit: percent
Direction: Higher is better
Version: No tools
Display harness: Claude Haiku 5.5 System Card
Board: https://www-cdn.anthropic.com/e1080d6bf5ae2018ea3c2f414064be03232f5be5/Claude%20Haiku%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 Haiku 5.5Anthropic	45.9% Reported settings & source No tools; max effort from summary table; thinking auto in methodology; 980K task budget, no context compaction; Claude Opus4.6 grader. Reasoning only; no tools. Provider-published lab_self_report; retained as launch evidence, not an independent board admission. Comparison limit: Provider publication; exact benchmark-specific configuration and independent evaluation provenance require separate review before matched-board admission. Claude Haiku 5.5 System Card · Table 8.1.A; section 8.8.1; pp.111,118–120 · reviewed 2026-10-07	Claude Haiku 5.5 System Card	lab self-report	2026-10-07