Select DeepSeek Thinking Mode for Advanced Logic and Reasoning Tasks
Toggle between chat and reasoner modes for complex problem solving.
Use the 'deepseek-reasoner' model identifier when you need the model to engage its 'thinking mode' for complex logical or reasoning tasks.
The Scenario
You are troubleshooting a complex software bug or designing a multi-step project plan that requires rigorous logical validation.
Before & after
Users would manually draft step-by-step logic chains or use multiple prompts to force logical consistency, often taking 15-20 minutes for a single complex problem.
Use 'deepseek-reasoner' to toggle the thinking mode, which handles complex logic via the V3.2 architecture. It takes about 2 minutes to switch the parameter.
The Prompt
Use the deepseek-reasoner model to solve this logical puzzle or complex architectural decision: [INSERT_COMPLEX_PROBLEM]
DeepSeek's hybrid reasoning architecture allows you to choose between standard chat for speed and 'reasoning mode' for deep logical tasks using the same API underlying DeepSeek-V3.2.
Source
Change Log | DeepSeek API Docs"deepseek-reasoner' corresponds to DeepSeek-V3.2's thinking mode... A single model supports both thinking mode and non-thinking mode."