Model index
DeepSeek·DeepSeek V / R

DeepSeek-V3.1-Terminus

A refined V3.1 release improving language consistency, tool use, and agent performance.

LegacyReasoningCodingAgentOpen weights
MODEL NUMBER228
First public date
2025-09-22
Organization
DeepSeek
Family
DeepSeek V / R
01

Specifications

Only published specifications are shown.

Input modalities
Text
Output modalities
Text
Open weights
Yes
Status
Legacy
02

Overview

Overview

A refined V3.1 release improving language consistency, tool use, and agent performance.

03

Changes from predecessor

Compared with DeepSeek-V3.1

PreviousDeepSeek-V3.1 · 128K ctx
CurrentDeepSeek-V3.1-Terminus · ctx
04

Architecture & capabilities

05

Release history

Open weights

DeepSeek-V3.1-Terminus released model weights.

View source
06

Related models

Select a card to view the related model.

07

Sources