DeepSeek V3.1

DeepSeek· released 21 Aug 2025

deepseek/deepseek-chat-v3.1

Input / 1M tokens: $0.25
Output / 1M tokens: $0.95

Context window164K tokens

Longest answer: 33K tokens

reads textopen weightstool callingreasoning

About

DeepSeek-V3.1 is a large hybrid reasoning model (671B parameters, 37B active) that supports both thinking and non-thinking modes via prompt templates. It extends the DeepSeek-V3 base with a two-phase long-context...

Details

Lab: DeepSeekopenrouter.ai · 3 Oct 2026
Context: 164Kopenrouter.ai · 3 Oct 2026
Input price: $0.25 / 1Mopenrouter.ai · 3 Oct 2026
Output price: $0.95 / 1Mopenrouter.ai · 3 Oct 2026
Max output: 32,768 tokensopenrouter.ai · 3 Oct 2026
Inputs: textopenrouter.ai · 3 Oct 2026
Open weights: Yesopenrouter.ai · 3 Oct 2026

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Sources

openrouter.ai/deepseek/deepseek-chat-v3.1· checked 3 Oct 2026