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DeepSeek V3.1 Terminus Model Specs, Costs & Benchmarks (November 2025)

DeepSeek V3.1 Terminus, developed by DeepSeek, features a context window of 163.8K tokens. The model costs $0.23 per million tokens for input and $0.90 per million tokens for output. It was released on September 22, 2025, and has achieved impressive scores in various benchmarks.
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Overview

DeepSeek V3.1 TerminusDeepSeek V3.1 Terminus
Model Provider
The organization behind this AI's development
DeepSeek logoDeepSeek
Input Context Window
Maximum input tokens this model can process at once
163.8K
tokens
Output Token Limit
Maximum output tokens this model can generate at once
163.8K
tokens
Release Date
When this model first became publicly available
September 22nd, 2025

Pricing

DeepSeek V3.1 TerminusDeepSeek V3.1 Terminus
Input Token Cost
Cost per million input tokens
$0.23
per million tokens
Output Token Cost
Cost per million output tokens
$0.90
per million tokens

Capabilities & Features

DeepSeek V3.1 TerminusDeepSeek V3.1 Terminus
Input Types
Supported input formats
text
Output Types
Supported output formats
text
Tokenizer
Text encoding system
DeepSeek
Key Features
Advanced capabilities
✓ Function Calling✓ Structured Output✓ Reasoning Mode
Open Source
Model availability
Available on HuggingFace →

Benchmarks

DeepSeek V3.1 TerminusDeepSeek V3.1 Terminus
MMLU
Measures knowledge across 57 subjects like law, math, history, and science
Not available
MMMU
Measures understanding of combined text and images across various domains
Not available
HellaSwag
Measures common sense reasoning by having models complete sentences about everyday situations
Not available