Introduction

What is Crucible

Crucible is a high-performance reasoning API built for developers and teams that need reliable, structured intelligence at scale. Unlike standard language model APIs, Crucible is optimized specifically for multi-step reasoning tasks — contract analysis, research synthesis, document extraction, and complex decision workflows.

This documentation covers everything from initial setup to advanced configuration. If you're new, start with the Quickstart guide. If you're migrating from another API provider, the Authentication and Rate Limits pages will get you oriented quickly.

What Crucible is built for

Crucible performs best on tasks that require the model to reason across multiple steps before producing an output. This includes:

• Extracting structured data from unstructured documents

• Answering questions that require weighing multiple sources

• Generating outputs that follow strict logical or procedural constraints

• Running classification and scoring pipelines at volume

What Crucible is not

Crucible is not optimized for casual chat interfaces or creative generation. If your use case is conversational UI or general-purpose writing assistance, a standard language model API will serve you better.