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Cognitive Revolution · October 10, 2025 · 75m

The Reasoning Revolution: o1 to o3 and Beyond

Deep dive into the reasoning model paradigm shift from o1 through o3, examining how chain-of-thought reasoning at inference time creates fundamentally different AI capabilities.

Canon

Chain-of-thought reasoning makes AI cognition legible in the same way biographies make human cognition legible: you can trace the steps that led to conclusions.
O3's benchmark scores that would have seemed impossible a year ago now feel like the bare minimum, illustrating hedonic adaptation in AI evaluation.