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DeepSeek V3.1 Terminus

Model family: DeepSeek
V3.1-Terminus is built to prioritize correctness and step-by-step logic over speed. It absorbs large prompts—multi-document briefs, repositories, and long chats—then plans, checks intermediate steps, and integrates retrieved evidence before composing an answer. The model follows instructions precisely, emits schema-true JSON when automations require it, and calls tools to run calculations, query knowledge bases, or execute code in the loop. Bilingual by design, it handles Chinese and English comfortably across technical and business domains. In practice, teams route routine queries to lighter siblings and reserve Terminus for the hardest tasks: complex analytics, formal reasoning, repository-scale refactors, policy-aware drafting, and investigations where grounded, auditable outputs matter more than latency.
New Text Gen 7
Released: September 22, 2025

Overview

DeepSeek-V3.1-Terminus is DeepSeek’s flagship reasoning model, tuned for difficult analysis, math, and coding. It supports very long context, function/tool calling, reliable JSON outputs, and an optional extended-thinking mode—ideal for enterprise RAG, agents, and high-stakes workflows.

About DeepSeek

DeepSeek is a Chinese AI firm specializing in large language models, based in Hangzhou.

Industry: Artificial Intelligence
Company Size: N/A
Location: Hangzhou, Zhejiang, CN
View Company Profile

Tools using DeepSeek V3.1 Terminus

Last updated: February 25, 2026
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