Reference · Glossary
Reasoning model
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An LLM configuration that spends **extra compute on stepwise thinking** before answering — better on hard logic, slower and pricier than fast chat models.
When to use
Multi-step planning, constraint puzzles, tasks where cheaper models fail evals.
When not to
Bulk classification, simple rewrites, latency-sensitive high-QPS paths.
Example
A migration planner that must respect budget + downtime windows — run on reasoning tier; headline variants — fast tier.