DeepSeek: DeepSeek V3.1 Terminus

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 performance in coding and search agen...

49.6 Coding Index*$0.21/1M input tokens†
*Artificial Analysis‡Kilo Code Leaderboard†OpenRouter
Release Date
September 22, 2025
Context Window
163,840 tokens
Input Modalities
text

Coding Performance

Coding benchmarks and performance metrics for development tasks

Coding Benchmarks

Artificial Analysis Coding Index

49.6%

Overall coding capability score

LiveCodeBench

79.8%

Real-world coding task performance

SciCode

40.6%

Scientific computing & algorithms

TerminalBench Hard

28.4%

CLI & terminal command generation

LCR (Long Context Reasoning)

65.0%

Understanding large codebases

IFBench

57.0%

Instruction following accuracy

Performance metrics from Artificial Analysis

Real-World Usage

Real-world usage statistics from the Kilo Code community

Weekly Token Usage

Mode Rankings (Last Week)

Where this model ranks for each built-in mode

Architect

Plan and design before implementation

No data

Code

Write, modify, and refactor code

No data

Ask

Get answers and explanations

No data

Debug

Diagnose and fix software issues

#78

Orchestrator

Coordinate tasks across multiple modes

No data

Real-world metrics from the Kilo Code Leaderboard

Pricing

Cost per 1 million tokens

Input Tokens
$0.21
per 1M tokens
Output Tokens
$0.79
per 1M tokens

Example Cost

Analyzing a 10,000 line codebase (≈40k input tokens, 10k output tokens) costs approximately $0.0163

Coding Capabilities

Features and parameters relevant to coding tasks

Coding Features

Function Calling
Can call external functions/APIs
Tool Choice
Control over function selection
Structured Outputs
JSON schema validation
Reasoning Tokens
Extended thinking for complex problems

Pricing details from OpenRouter

Technical Details

Architecture and implementation specifications

Model ID
deepseek/deepseek-v3.1-terminus
Artificial Analysis Slug
deepseek-v3-1-terminus-reasoning
Created
September 22, 2025
Tokenizer
DeepSeek
Input Modalities
text
Context Window
163,840 tokens
Input Price
$0.21 per 1M tokens
Output Price
$0.79 per 1M tokens
Cache Read Price
$0.00 per 1M tokens
Content Moderation
Disabled

Ready to try DeepSeek: DeepSeek V3.1 Terminus?

Install Kilo Code and start using DeepSeek: DeepSeek V3.1 Terminus for your coding projects today. Choose from 400+ AI models with complete freedom.