GPT-5.6 Series (2 minute read)

# GPT-5.6 - ARC-AGI Results Source: [https://arcprize.org/results/openai-gpt-5-6](https://arcprize.org/results/openai-gpt-5-6) ## GPT\-5\.6Series OpenAI·Jul 9, 2026·3models·15reasoning 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\. ## ARC\-AGI 3leaderboard GPT\-5\.6 SolGPT\-5\.6 TerraGPT\-5\.6 Luna ## Verified scores ModelVariantARC\-AGI\-1ARC\-AGI\-2ARC\-AGI\-3[Sol](https://arcprize.org/results/openai-gpt-5-6-sol)Max96\.5% 92\.5% 7\.8% Extra High97\.5% 90\.0% 7\.0% High97\.0% 85\.4% 2\.1% Medium92\.5% 67\.1% 1\.1% Low74\.5% 42\.5% 0\.3% [Terra](https://arcprize.org/results/openai-gpt-5-6-terra)Max96\.5% 83\.9% 0\.8% Extra High94\.0% 74\.2% 0\.7% High92\.0% 67\.1% 0\.5% Medium77\.0% 37\.5% 0\.1% Low60\.2% 18\.8% 0\.0% [Luna](https://arcprize.org/results/openai-gpt-5-6-luna)Max88\.0% 59\.5% 0\.2% Extra High87\.7% 47\.6% 0\.0% High76\.5% 29\.3% 0\.1% Medium56\.5% 7\.4% 0\.2% Low34\.2% 5\.1% 0\.2% ## Tasks & environments Pass/fail per reasoning level across each benchmark\. Hardest tasks \(fewest levels solving\) are listed first\. Model ### ARC\-AGI\-3 Public Demo 25environments ### ARC\-AGI\-2 Public Eval 120tasks ### ARC\-AGI\-1 Public Eval 400tasks [All results](https://arcprize.org/results)