ARC Prize Verified

Claude Fable 5.1

Anthropic·Sep 1, 2026·5 reasoning variants

At max effort, Claude Fable 5.1 scores 97.5% on ARC-AGI-1 Semi-Private at $1.40 per task and 90.0% on ARC-AGI-2 Semi-Private at $4.49 per task.

ARC-AGI 2 leaderboard

Claude Fable 5.1

Verified scores

VariantARC-AGI-1ARC-AGI-2ARC-AGI-3
Max
97.5%
90.0%
XHigh
96.5%
90.0%
High
96.0%
88.8%
Medium
94.5%
86.3%
Low
90.0%
78.3%

Tasks & environments

Pass/fail per reasoning level across each benchmark.

ARC-AGI-2 Public Eval

120 tasks
Task
Max
XHigh
High
Medium
Low

ARC-AGI-1 Public Eval

400 tasks
Task
Max
XHigh
High
Medium
Low