OpenAI's GPT-5.2, released in December 2025, marked a significant milestone in AI abstract reasoning by achieving approximately a 53–54% success rate on the ARC-AGI-2 benchmark. This performance far exceeded the prior state of the art, where no closed-model system had previously cleared even 5% success on these tasks.
- GPT-5.2 was the first model to breach the 50% threshold on ARC-AGI-2, a benchmark designed to measure fluid intelligence and generalization rather than narrow skills.
- The ARC-AGI-2 benchmark consists of diverse visual puzzles requiring conceptual abstraction, with human subjects solving 100% of tasks while earlier AI models scored virtually zero.
- Subsequent systems like GPT-5.4 Pro and Google's Gemini 3 "Deep Think" later pushed scores above 83%, though the newly launched ARC-AGI-3 benchmark has reset the frontier to near-zero.
GPT-5.2's breakthrough represented the pivotal moment when AI first demonstrated the ability to cross the 50% success rate on this rigorous test of abstract reasoning.