ARC Prize Verified

GPT-5.6 Sol

OpenAI·Jul 9, 2026·5 reasoning variants

GPT-5.6 Sol is the standout model of the GPT-5.6 family. Sol at max reasoning effort is the only performant model (as of July 2026) averaging 13.33% on Public and 7.78% on Semi-Private. It is the first model to win an ARC-AGI-3 public game (ft09, 87%). Sol is able to read an unfamiliar scene correctly and in the game's own vocabulary. It treats a failed hypothesis as a reason to re-plan rather than thrash. Most agent failures are upstream of the code they write or the action they take. Sol is able to perform on ARC-AGI not because it executes better, but because it correctly orients itself in a new environment first.

Related models: GPT-5.6 Terra, GPT-5.6 Luna

ARC-AGI 3 leaderboard

GPT-5.6 Sol

Verified scores

VariantARC-AGI-1ARC-AGI-2ARC-AGI-3
Max
96.5%
92.5%
7.8%
Extra High
97.5%
90.0%
7.0%
High
97.0%
85.4%
2.1%
Medium
92.5%
67.1%
1.1%
Low
74.5%
42.5%
0.3%

Tasks & environments

Pass/fail per reasoning level across each benchmark. Hardest tasks (fewest levels solving) are listed first.

ARC-AGI-3 Public Demo

25 environments

ARC-AGI-2 Public Eval

120 tasks
Task
Max
Extra High
High
Medium
Low

ARC-AGI-1 Public Eval

400 tasks
Task
Max
Extra High
High
Medium
Low