Category primer

Cheap judgment.Hard decisions.

Decision Models (System One / classifier models) return typed answers with calibrated probabilities — not prose. Use them for the fast gate; keep frontier LLMs for the hard calls.

Live contrast

System 2 · LLM

Thinking…

System 1 · Decision

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Orders of magnitude, not vibes

Illustrative for a classification-shaped task — not a vendor benchmark. Real products vary by schema, state size, and hosting.

Latency

Decision Model

~0.2s

Frontier LLM

~8s

Relative cost

Decision Model

1×

Frontier LLM

~200×

Dual-process in one glance

Gate first. Escalate only when the decision is hard or uncertain.

Judgment meter (demo)

Pick a scenario. Bars are a teaching mock — not a live API call.

transactional0%
marketing0%
phishing0%

Go deeper

Dual-process architecture in productionCombine a System One Decision Model with a frontier LLM — fast classifier first, deep reasoning only when needed.
What is a System One model?System One models return typed decisions with calibrated probabilities — they do not generate text.