Development

Opus 4.6 sets a new high on Humanity's Last Exam

development2026-02-06

Claim

Anthropic released Claude Opus 4.6 with a million-token window, beating GPT-5.2 on GDPval-AA and setting a new state of the art of 53.1% on Humanity's Last Exam.

Reported metric: 53.1%

Reporting date: 2026-02-06 (not necessarily the event date)

Sources

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

Welcome to February 6, 2026 (theinnermostloop.substack.com)

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About

Claude Opus 4.6

Reported in

Welcome to February 6, 2026

Actor

Anthropic

Evidence for

Supersedes

An ensemble of three labs' models hits 94.5% on ARC-AGI

Referenced by

Cite or correct this record

Citation formatCitation text

Opus 4.6 sets a new high on Humanity's Last Exam
Innermost Loop KB — secondary record
Reporting date: 2026-02-06
KB permalink: https://nicholsn.github.io/innermost-loop-kb/developments/2026-02-06-opus-46-released
Claim: Anthropic released Claude Opus 4.6 with a million-token window, beating GPT-5.2 on GDPval-AA and setting a new state of the art of 53.1% on Humanity's Last Exam.
Attributed sources:
- Welcome to February 6, 2026 — https://theinnermostloop.substack.com/p/welcome-to-february-6-2026
This citation does not imply independent verification of linked-source claims.

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