Perplexity's Decisions API is designed for rapid and structured decision-making that can be directly utilized by software applications. Rather than producing unstructured free-form text, it interprets various inputs such as natural-language text, JSON, or images as a shared context and delivers typed responses accompanied by probabilities. Developers have the flexibility to append multiple named questions to a single input, selecting from three distinct question types. The "noul" type provides yes-or-no evaluations, offering the probability of a "yes" response ranging from 0 to 1. The "choice" type allows developers to specify options and returns the most probable selection, along with the probabilities for each option and a confidence measure. Meanwhile, the "score" type assesses content based on a predetermined rubric, delivering a probability-weighted score, the complete probability distribution, and a confidence level. This API is particularly suited for various applications including classification, routing, rubric-based grading, severity assessments, sentiment analysis, and any decision-making process that can be evaluated against a certain threshold, making it a versatile tool for developers. Additionally, its structured approach enhances the reliability of the decisions made by the software, ensuring that outcomes are both accurate and consistent.