NLP & Language · intermediate · concept 87 of 176

🧩Reasoning Models & Test-Time Compute

LLMs trained to produce a long internal chain of reasoning before answering, spending extra compute at inference time to get better answers on math, code, and logic. OpenAI's o-series and DeepSeek-R1 established this as a second scaling axis alongside model size. Most frontier assistants now offer a thinking mode built on this idea.