GPT-5.2 Pro Scores Higher on ARC-AGI Than o3 Did — at 400x Lower Cost
OpenAI's cost per task on the ARC-AGI benchmark dropped from $4,500 to under $12 in roughly a year, while accuracy actually improved — a stunning efficiency gain that reshapes the economics of frontier reasoning.
The cost of frontier AI reasoning on the ARC-AGI benchmark has collapsed by nearly 400x in a single year, as @rohanpaul_ai highlighted on Monday. When OpenAI's o3 model was evaluated on ARC-AGI roughly a year ago, it scored 88% accuracy at a cost of approximately $4,500 per task. GPT-5.2 Pro now scores 90.5% — a modest but real accuracy improvement — at just $11.64 per task.
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