DeepSeek V3.1 Terminus

DeepSeek chatreasoningtool_use

API ID: deepseek/deepseek-v3.1-terminus

Input Price
$0.21
/1M tokens
Output Price
$0.79
/1M tokens

About DeepSeek V3.1 Terminus

DeepSeek V3 represents the latest evolution of DeepSeek's flagship model, delivering exceptional performance at remarkably low costs. Using an efficient Mixture-of-Experts architecture with 671 billion total parameters but only 37 billion active per token, it achieves GPT-4-class capability while maintaining industry-leading affordability. The model excels at complex reasoning, coding, mathematics, and multilingual tasks. DeepSeek V3 features a 128K context window and demonstrates strong performance across major benchmarks. Its open weights enable self-hosting for organizations with data privacy requirements. The model has disrupted market expectations about AI pricing, proving that frontier capability doesn't require frontier costs. For developers seeking maximum capability per dollar, DeepSeek V3 offers compelling economics that have influenced pricing across the industry.

๐Ÿ’ฐ
Price Ranking
#416 lowest price among 599 Chat models

Model Specifications

Context Length
164k
Max Output
โ€”
Release Date
2025-09-22
Capabilities
chat reasoning tool_use
Input Modalities
text
Output Modalities
text

Best For

  • Complex reasoning, math problems, multi-step logic
  • Conversations, content writing, general assistance

Consider Alternatives For

  • Image understanding (needs vision capability)
  • Simple Q&A (cheaper models available)

๐Ÿ’ฐ Real-World Cost Examples

Estimated monthly costs for common use cases

Personal AI Assistant
$0.33
/month
50 conversations/day, ~500 tokens each
Customer Service Bot
$10.26
/month
1000 tickets/day, ~800 tokens each
Data Analysis Pipeline
$14.20
/month
500 analyses/day, ~2k tokens each

DeepSeek Model Lineup

Compare all models from DeepSeek to find the best fit

Model Input Output Context Capabilities
DeepSeek V3.1 Terminus Current Free Free 164k chat reasoning tool_use
DeepSeek V3 Base Free Free 131k chat
DeepSeek V2.5 Free Free 128k chat
R1 Distill Llama 8B Free Free - chat reasoning
R1 0528 Free Free 164k chat reasoning tool_use
DeepSeek V3.1 Base Free Free 164k chat reasoning

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๐Ÿš€ Quick Start

Get started with DeepSeek V3.1 Terminus API

OpenAI-compatible SDK
from openai import OpenAI

client = OpenAI(
    base_url="https://api.provider.com/v1",
    api_key="YOUR_API_KEY"
)

response = client.chat.completions.create(
    model="deepseek/deepseek-v3.1-terminus",
    messages=[
        {"role": "user", "content": "Hello!"}
    ]
)
print(response.choices[0].message.content)