Model summary · Edition 1.0

Claude Fable 5.1High

These results come from one run: 7 fixed subjects, 5 rounds each, a 50-question limit, and reasoning setting high. They do not predict results on other subjects or settings.

This page always shows the model’s newest ranked run.

See all 35 rounds → All models

Every question, answer, guess, and source.

Rank: Rank 2of 18 models
Question score: 12.11 Lower is better. 95% confidence interval 8.81 to 15.41.
Rounds solved: 34 of 35 1 format error
Guesser cost per round: $0.5014 Model time 3m 17s.

See how Claude Fable 5.1 (high) played. All 35 rounds, with every question, answer, guess, and source.

Observations

What stood out in this run.

Counts and ranks from this run only. A subject rank compares this model’s average on that subject with every other model in this edition. Each item links to its rounds.

Best ranks vs other models

Genghis Khan: best of 18 models, average 9.00 questions. round 1, round 2, round 3, round 4, round 5
Stephen King: 2nd of 18 models, average 11.60 questions. round 1, round 2, round 3, round 4, round 5

Lowest ranks vs other models

Garfield: 11th of 18 models, average 17.40 questions. round 1, round 2, round 3, round 4, round 5
Albert Einstein: 8th of 18 models, average 9.80 questions. round 1, round 2, round 3, round 4, round 5

Single rounds

Fewest questions in a solved round: 4, on Mario. round 1
Most questions in a solved round: 32, on Albert Schweitzer. round 2
Largest spread between rounds: Garfield, from 7 to 51 questions. round 1, round 2, round 3, round 4, round 5
31 wrong guesses in 35 rounds, up to 26 in one round on Garfield. round 5

Failed rounds and format errors

Not solved: Garfield. Question limit reached after 50 questions; scored as 51. round 5
1 format error in 1 round. Each one before the question limit used a counted turn. Garfield round 5

Subjects

Results by subject.

Failed rounds count as 51 questions. Rank compares this subject's average with the other models in edition 1.0. Select a subject or a round to see the game.

Subject	Average questions	Subject rank	Solved	Rounds
Albert Einstein	9.80	8 of 18	5 of 5	9, 9, 9, 8, 14
Albert Schweitzer	24.40	5 of 18	5 of 5	21, 32, 19, 22, 28
Stephen King	11.60	2 of 18	5 of 5	13, 11, 11, 12, 11
Garfield	17.40	11 of 18	4 of 5	9, 7, 7, 13, not solved
Achilles	7.60	5 of 18	5 of 5	9, 7, 7, 8, 7
Genghis Khan	9.00	1 of 18	5 of 5	8, 11, 9, 8, 9
Mario	5.00	5 of 18	5 of 5	4, 6, 5, 5, 5

Runs

Runs of this model.

Each edition ranks only the newest complete run of a model. Earlier runs are not ranked and their details are not published.

Current run in edition 1.0: BX-20260902-official-M0020-001, completed 2 Sep 2026.
Edition 1.1: rank 5 of 20, question score 15.10. Different rules and subjects, so scores are not comparable across editions.