Invoke 'DeepThink' Reasoning for High-Difficulty Technical Tasks
Switch to DeepThink mode for math and complex coding.
Use the 'deepseek-reasoner' model endpoint or 'DeepThink' UI toggle when accuracy in math and logic is more important than speed.
The Scenario
You are working on a highly complex math benchmark or a difficult coding challenge where standard AI models frequently make logical errors.
Before & after
Users would struggle with complex logic or math problems using standard "chat" models, often having to verify results manually for 15-20 minutes.
Enable DeepThink in the app/web UI or use the 'deepseek-reasoner' endpoint to invoke high-compute logic. This takes roughly 15-30 seconds to toggle.
The Prompt
Perform a deep reasoning analysis on this problem: [DESCRIBE_COMPLEX_MATH_OR_CODING_PROBLEM]. Walk through every logical step before providing the final solution.
Select the 'thinking mode' (deepseek-reasoner) specifically for tasks where the AI needs to 'show its work' or handle extreme technical depth.
Source
Change Log | DeepSeek API Docs"deepseek-reasoner corresponds to DeepSeek-V3.2's thinking mode... matched GPT-5 in reasoning."