DeepSeek-V3.1-Terminus

deepseek

DeepSeek-V3.1 Terminus is an update to DeepSeek 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 performance in coding and search agents. It is a large hybrid reasoning model (671B parameters, 37B active) that supports both thinking and non-thinking modes. It extends the DeepSeek-V3 base with a two-phase long-context training process. Users can control the reas...

Context
164K
Input price
$0.27/1M tokens
Output price
$0.95/1M tokens

Capabilities

Reasoning & Interaction
Tool Calling
Output Control
Structured Output
JSON Mode
Infrastructure
Streaming
Fine-tuning

Details

Model IDdeepseek-ai/DeepSeek-V3.1-Terminus
Provider DeepInfra
Creator DeepSeek
Licensedeepseek
Statusactive
Typechat
Input modalitiestext
Output modalitiestext
Open weightYes
Parameters—
Architecture—
Context window164K tokens
Max input—
Max output—
Reasoning tokens—
Knowledge cutoff—
Release date—
Sourceofficial

Tools

Function Callingfunction_calling
Call external functions and APIs

Endpoints

Chat CompletionsPOST
Generate chat responses with messageshttps://api.deepinfra.com/v1/openai/v1/chat/completions

Pricing

Input
$0.27
Output
$0.95
Cache write
—
Cache read
$0.13
Batch in
—
Batch out
—

Family Comparison: deepseek-v3

ModelContextMax outPricing
DeepSeek-V3-0324164K—$0.24$0.9
DeepSeek-V3.1164K—$0.25$0.95
DeepSeek-V3.2164K—$0.26$0.38
DeepSeek-V3.1-Terminus164K—$0.27$0.95
DeepSeek-V3164K—$0.32$0.89

API

GET/v1/models/deepinfra/deepseek-ai/DeepSeek-V3.1-Terminus

DeepSeek-V3.1-Terminus

deepseek-ai/DeepSeek-V3.1-Terminus

DeepSeek-V3.1 Terminus is an update to DeepSeek 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 performance in coding and search agents. It is a large hybrid reasoning model (671B parameters, 37B active) that supports both thinking and non-thinking modes. It extends the DeepSeek-V3 base with a two-phase long-context training process. Users can control the reas...

Changes · 3 entries
deepseek-ai/DeepSeek-V3.1-Terminusupdateca7a400Nov 2, 2026, 03:02 AM
pricinginput$0.21→$0.27output$0.79→$0.95
deepseek-ai/DeepSeek-V3.1-Terminusupdate80c574aJun 3, 2026, 07:05 AM
pricinginput$0.21→$0.27output$0.79→$0.95
deepseek-ai/DeepSeek-V3.1-Terminuscreate3e56cf1Apr 26, 2026, 07:23 PM