Test-Time Compute (System 2)

What is Test-Time Compute (System 2)?

Test-Time Compute refers to models that spend time generating hidden 'thinking tokens' before producing a final answer, effectively trading time for increased intelligence (similar to human System 2 thinking).

Where did the term "Test-Time Compute (System 2)" come from?

Popularized by OpenAI's o1 and DeepSeek R1.

How is "Test-Time Compute (System 2)" used today?

A new scaling law for reasoning capabilities.

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