ModelSpec is an analysis of alternatives for AI models: it decides which models fit a job from your requirements, sourced benchmarks and real cost, and shows its work.

Guides

Choose models for a job and understand which decision tools fit.

Start with How to choose an AI model for a job to turn a job into requirements and read a worked decision from the delayed public image.

Read Analysis of alternatives, model router or hard-coded model: which job each does to decide when each category fits. The comparison covers the timing of the decision, the evidence it needs, constraints, operating overhead and failure modes.

These guides explain how to evaluate a job. For depth, read the method; for entity facts, read about ModelSpec.

Human lookup is free on Decide. CLI, API, and MCP access requires a key. Access and pricing.

Guides · Use-case examples · Model comparisons · How we decide