DeepSeek V3.1 Terminus

DeepSeek· released 22 Sept 2025

deepseek/deepseek-v3.1-terminus

Input / 1M tokens: $0.27
Output / 1M tokens: $1

Context window164K tokens

Longest answer: 147K tokens

reads textopen weightstool callingreasoning

About

DeepSeek-V3.1 Terminus is an update to [DeepSeek V3.1](/deepseek/deepseek-chat-v3.1) that maintains the model's original capabilities while addressing issues reported by users, including language consistency and agent capabilities, further optimizing the model's...

Details

Lab: DeepSeekopenrouter.ai · 3 Oct 2026
Context: 164Kopenrouter.ai · 3 Oct 2026
Input price: $0.27 / 1Mopenrouter.ai · 3 Oct 2026
Output price: $1 / 1Mopenrouter.ai · 3 Oct 2026
Max output: 147,456 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-v3.1-terminus· checked 3 Oct 2026