Inside Decision Models: How Perplexity's Decider Works and When to Use One
antoine_chaffin · x · 2026-10-31
Perplexity researcher Antoine Chaffin shares a deep-dive article by Joseph Barrow explaining how decision models work and how Perplexity trained its Decider, with more details promised in an upcoming discussion with Joe.
Decision models blew up after Jev's release: general-purpose classification had a moment, arXiv saw an explosion of "Jevology" papers, and OpenAI quickly shipped its own version. The article walks through how Perplexity Decider works, training considerations, and when and how to use decision models in practice, illustrated with Excalidraw diagrams.
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