Hard Reasoning · sub-raceDominant lead
Frontier Questions race
Questions written by subject experts to sit at the edge of human knowledge, answered with tools allowed.
- Leader
- Fable 5.1
- Margin
- 3.1 pts
- 4.8% ahead
- Weeks at #1
- 9
- in a row
- Changes
- 4
- in 2026
Warming up the track…
Oct 19, 2026Fable 5.1 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 5.1GPT-6 AstraGPT-6.1 SolGemini 4 ArgonOpus 5.5Grok 4.7
Reigns at #1
Longest: Grok 4, 18 weeks (from Jul 2025).
Sibling races
More hard reasoning races
Why this race matters
Once a model saturates school-style tests, only questions like these separate the very top.
How it is scored
Accuracy with tools enabled, standard prompt.
Unit: percentHigher is betterPhoto finish under 0.5 ptsDominant over 3.0 pts
Data provenance
2,500 expert questions across 100+ subjects.
Scores here are illustrative placeholders that mimic real benchmark patterns. Swap in live data through the score provider. Methodology