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?'})Providers
Route requests across multiple providers. Copy a provider slug to set your preference. Visit the docs for more info. Using a provider means you agree to their terms, listed under Legal.
| Provider |
|---|
 DeepInfra | 164K | 9.7s | 10tps | $0.21/M | $0.79/M | Read:$0.13/M Write:— | — | — | 08/21/2025 | |||
 Novita AI | 164K | 1.6s | 34tps | $0.27/M | $1.00/M | Read:$0.14/M Write:— | — | — | 08/21/2025 | |||
 Fireworks | 164K | $0.56/M | $1.68/M | Read:$0.28/M Write:— | — | — | 08/21/2025 | |||||
 Together AI | 128K | $0.60/M | $1.70/M | — | — | 08/21/2025 | ||||||
 SambaNova | 128K | $3.00/M | $4.50/M | — | — | 08/21/2025 |