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DeepSeek V3.1

DeepSeek V3.1 is DeepSeek's August 21, 2025 model update introducing hybrid inference with selectable thinking and non-thinking modes in one endpoint. It strengthens tool use and multi-step agent capabilities over DeepSeek-V3.

ReasoningTool Use
index.ts
import { streamText } from 'ai'


const result = streamText({
  model: 'deepseek/deepseek-v3.1',
  prompt: 'Why is the sky blue?'
})
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