Skip to content
Leaderboards.

Humanity's Last Exam leaderboard: who is #1

Scale AI and CAIS · Accuracy, higher is better · 42 models · published Sep 24, 2026

Scale AI and CAIS

Top 25 of 42 models, best variant per model as published

#ModelScoreCorrect
1GPT-6 Astraas “GPT 6 Astra”54.8%
2Claude Fable 5.1as “Fable 5.1 (xhigh)”46.5%
3Gemini 3.1 Pro Previewas “gemini-3.1-pro-preview (thinking high)”46.4%
4Gemini 3.8 FlashGoogle44.5%
5GPT-5.4 Proas “gpt-5.4-pro-2026-03-05”44.3%
6Muse SparkMeta40.6%
7Gemini 3 Proas “gemini-3-pro-preview”37.5%
8GPT-5.4as “gpt-5.4-2026-03-05 (xhigh thinking)”36.2%
9Claude Opus 4.7as “claude-opus-4-7”36.2%
10Claude Opus 4.6as “claude-opus-4-6-thinking-max”34.4%
11GPT-5 Proas “gpt-5-pro-2025-10-06”31.6%
12GPT-5.2as “gpt-5.2-2025-12-11”27.8%
13GPT-5as “gpt-5-2025-08-07”25.3%
14Claude Opus 4.5as “claude-opus-4-5-20251101-thinking”25.2%
15Kimi K2.5as “kimi-k2.5”24.4%
16GPT-5.1as “gpt-5.1-thinking”23.7%
17Gemini 2.5 Pro (Jun 2025)as “gemini-2.5-pro-preview-06-05”21.6%
18o3as “o3 (high) (April 2025)”20.3%
19GPT-5 minias “gpt-5-mini-2025-08-07”19.4%
20o4-minias “o4-mini (high) (April 2025)”18.1%
21Claude Sonnet 4.5as “claude-sonnet-4-5-20250929-thinking”13.7%
22Gemini 2.5 Flash (Sep 2025)as “Gemini 2.5 Flash (April 2025)”12.1%
23Claude Opus 4.1as “claude-opus-4-1-20250805-thinking”11.5%
24Claude Opus 4as “Claude Opus 4 (Thinking)”10.7%
25Gemini 3.1 Flash-Liteas “gemini-3.1-flash-lite-preview”8.6%
About this board and its history

What it measures

2,500 expert-written questions across dozens of subjects, built to be the last closed-ended academic exam.

Other reasoning boards

Source

Scores as published by Scale AI and CAIS on the capture date (2026-09-24). Source: labs.scale.com leaderboard page.

labs.scale.com/leaderboard/humanitys_last_exam

Sources: each leaderboard's own published results page, captured every day at 04:30 UTC. Scores exactly as each board published them; we run no evaluations. Logos via logo.dev; trademarks belong to their owners.

New #1s by email

Saturdays, only in weeks when a leaderboard has a new #1.

Double opt-in. Unsubscribe any time.