AI
best practice
Use DeepThink for Complex Reasoning and Error-Free Coding
Enable thinking mode for complex logical and coding tasks.
Switch your DeepSeek interface to 'DeepThink' or use the reasoner capability to handle complex tasks that require step-by-step verification.
DeepSeek
The Scenario
A developer needs to solve a complex coding logic error or a difficult math problem that requires multi-step verification.
Before & after
The old way
You would manually break the logic down on paper and verify each step, potentially taking 20–40 minutes for complex debugging.
With AI
Select 'DeepThink' mode in the chat interface to solve the problem in 1–2 minutes with visible reasoning steps.
The Prompt
[ACTIVATE_DEEPTHINK_MODE] Please analyze this complex logical problem and show your reasoning step-by-step: [INSERT_LOGIC_OR_CODE_PROBLEM]
DeepSeek V4 features a reasoning mode (similar to the previous deepseek-reasoner) that allows the model to 'think' before responding, which is ideal for coding and logic-heavy tasks.
Source
Change Log | DeepSeek API Docs"deepseek-reasoner corresponds to DeepSeek-V3.2's thinking mode. [DeepSeek V4 supports] deepseek-v4-pro or deepseek-v4-flash."