A thoughtful AI collaborator for writing, analysis, coding, and long-form work.
Full evaluationGlossary · Updated Sep 2, 2026
Reasoning model
A model trained to spend extra computation thinking through steps before answering, improving accuracy on complex problems.
Definition
Reasoning models generate intermediate reasoning, sometimes shown as a summary, before the final answer, trading speed and cost for better performance on maths, code, planning, and multi-step analysis. Many assistants let users switch between fast and reasoning modes or adapt automatically to task difficulty.
Why it matters when choosing a tool
Choose reasoning modes for hard, verifiable tasks and fast modes for drafting and simple lookups to balance quality, latency, and cost.
Where you will meet it
AI Assistants, AI Coding & Development, AI Data & Analytics
Related terms
Tools where this matters
Reviewed products in the related categories
A broad multimodal assistant for research, creation, analysis, and agentic work.
Full evaluation
AI writing, search, and task assistance inside a connected workspace and knowledge base.
Full evaluation
An AI-native code editor for repository-aware agents, edits, review, and automation.
Full evaluation
Automated code quality and security verification platform across IDE, CI/CD, and AI agent workflows.
Full evaluation
AI developer platform for tracking experiments, managing models, and evaluating agentic applications.
Full evaluation