FrontierThe story, in brief
How enabling two settings tripled our scores on the ARC-AGI-3 benchmark
Two API toggles tripled GPT-5.6's score on ARC-AGI-3. Here's what changed.
The KeyNews take
Why it matters
OpenAI disclosed a significant capability unlock on a major reasoning benchmark by toggling reasoning retention and compaction settings — practical tuning that practitioners may need to adopt to match published performance claims.
The key facts
6 to knowGPT-5.6 scores tripled on ARC-AGI-3 with two API settings
Settings: reasoning retention and compaction enabled
Benchmark: ARC-AGI-3 (abstract reasoning task)
Source: OpenAI official blog post
Date: July 29, 2026
Implication: published benchmarks may depend on non-default configurations
Go to the source
OpenAI Blogopenai.com
Publisher excerpt: How two API settings improved GPT-5.6 performance on ARC-AGI-3, boosting scores and efficiency by retaining reasoning and enabling compaction.