Hard Reasoning · sub-raceClear lead
Common-Sense Reasoning race
Trick questions about everyday physics, time and social situations that people find easy.
- Leader
- Fable 5
- Margin
- 1.3 pts
- 1.6% ahead
- Weeks at #1
- 20
- in a row
- Changes
- 2
- in 2026
Warming up the track…
Oct 20, 2026Fable 5 leads
2025Apr ’25Jul ’25Oct ’252026Apr ’26Jul ’26Oct ’26
Score history
Top 6 today over the leader's frontier · click to jump to a week
#1 frontierFable 5Opus 53.1 Pro3.5 FlashGrok 4.6Spark 1.2
Reigns at #1
Longest: Fable 5, 20 weeks (from Jun 2026).
Sibling races
More hard reasoning races
Why this race matters
Catches models that are strong on exams but stumble on basic real-world reasoning.
How it is scored
SimpleBench average score via Epoch AI's Benchmarking Hub. As measured, placed at release date.
Unit: percentHigher is betterPhoto finish under 0.5 ptsDominant over 3.0 pts
Data provenance
Epoch AI, 'Capabilities & benchmarking', CC BY 4.0.
SimpleBench · Epoch AI
As measured: one result per model, placed at its release date.
38 tracked models with a result (104 entries on the source board) · newest data August 12, 2026.