DeepSeek's advanced reasoning model from the R1 series, released May 2025. Built for deep chain-of-thought reasoning, it excels at complex mathematical, logical, and analytical problems. With 131K context and 32K output window, it handles substantial reasoning tasks. Superseded by the V3.2 Speciale model which achieves stronger reasoning at lower cost.
Try NowComplex mathematical reasoning
Multi-step logical deductions
Problems requiring extended thinking
131,072 tokens
32,768 tokens
$0.55 per 1M tokens
$2.15 per 1M tokens
$0.35 per 1M tokens
$15 per 1K calls
$0.19 per 1K calls
Superseded by V3.2 Speciale with superior reasoning capabilities