model-architecture
Reasoning Model
A reasoning model is an LLM specifically fine-tuned or trained to prioritize extended, multi-step chain-of-thought processing over immediate response generation.
Reasoning models (like Anthropic's Opus with thinking or OpenAI's o-series) do not just predict the next token. They perform a 'thinking' or 'reasoning' step, often involving multiple internal drafts or verification loops before producing the final response. This shift significantly reduces hallucination rates for complex tasks like multi-file coding or multi-agent orchestration.
Related terms
Learn more