The open-weight reasoning model that put long chain-of-thought in everyone's hands.
DeepSeek R1 is the open-weight reasoning model that popularized accessible long chain-of-thought. It trades speed for deliberate, step-by-step problem solving and remains a favourite for math, logic, and planning-heavy agent tasks at low cost.
Reasoning-heavy planning where cost matters.
The model picks the moves; the agent runs the loop, the tools, and the guardrails. Once you've chosen a model, see which agent gets the most out of it.