Hard Reasoning · compositeNarrow lead
Hard Reasoning race
Expert-level questions, novel puzzles, formal logic and multi-step planning.
- Leader
- Fable 5.1
- Margin
- 0.6 pts
- 0.6% ahead
- Weeks at #1
- 9
- in a row
- Changes
- 6
- in 2026
Warming up the track…
Oct 19, 2026Fable 5.1 leads
2025Apr ’25Jul ’25Oct ’252026Apr ’26Jul ’26Oct ’26
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Score history
Top 6 today over the leader's frontier · click to jump to a week
#1 frontierFable 5.1GPT-6 AstraGPT-6.1 SolOpus 5.5Gemini 4 ArgonGrok 4.7
Reigns at #1
Longest: GPT-5, 14 weeks (from Aug 2025).
Inside this race
What makes up hard reasoning
Why this race matters
Reasoning is the foundation under every other skill; it is where new model generations show up first.
How it is scored
Normalised subcategory scores, equally weighted.
Unit: indexHigher is betterPhoto finish under 0.6 ptsDominant over 3.5 pts
Data provenance
Expert-written questions at the frontier of knowledge.
Novel visual puzzles that resist memorisation.
Scores here are illustrative placeholders that mimic real benchmark patterns. Swap in live data through the score provider. Methodology