DeepSeek: DeepSeek V3.1 Terminus

by DeepSeek

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...

*Artificial Analysis‡Kilo Code Leaderboard†OpenRouter
Release Date
September 22, 2025
Context Window
163,840 tokens
Max Output
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

0

Performance metrics from Artificial Analysis

Real-World Usage

Real-world usage statistics from the Kilo Code community

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Real-world metrics from the Kilo Code Leaderboard

Pricing

Cost per 1 million tokens

Input Tokens
$1.64
per 1M tokens
Output Tokens
$2.75
per 1M tokens
Blended (3:1 ratio)
$1.91
per 1M tokens

Example Cost

Analyzing a 10,000 line codebase (≈40k input tokens, 10k output tokens) costs approximately $0.0929

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
Created
September 22, 2025
Tokenizer
DeepSeek
Input Modalities
text
Context Window
163,840 tokens
Max Completion Tokens
163,840 tokens
Input Price
$1.64 per 1M tokens
Output Price
$2.75 per 1M tokens
Content Moderation
Disabled

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