We are featured on Product Hunt today!Support Us & Vote on Product Hunt ↗
ModelVaultModel Finder
All Models Index11k+Cloud API ModelsAPIsLocal Models (Ollama)Free
Find a modelNewPlaygroundWebGPUTelemetry ⚡
AI Cost CalculatorCalculatorVRAM Hardware EstimatorGPUToken CounterTokensContext CapacityContextFind a modelFinder
SavedCompare
Compare
Models/DeepSeek V3.1 Terminus
DeepseekPaid API✓ Verified Spec & Code

DeepSeek V3.1 Terminus

Cloud API • Released 2024-01-01 • Last Verified 2026-08-06

Try PlaygroundDocs

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...

Context Window164k
LicenseCommercial API
Deployment
Cloud Only
API AvailableYes (REST/SDK)
💡

Plain English Summary (What is this model & who is it for?)

Think of DeepSeek V3.1 Terminus as a versatile AI assistant for writing, research, and brainstorming. It helps you draft emails, write essays, summarize long articles, and generate creative ideas on any topic.

💡 Real-World Use Cases & Practical Examples

✍️ Email & Article Drafting: Draft professional emails, blog posts, and press releases in seconds.
📚 Long Document Summarization: Condense 50-page PDF reports into actionable bullet points.
💡 Brainstorming & Strategy: Generate marketing ideas, product names, and event outlines.
🎓 Learning Partner: Ask questions and get step-by-step explanations on any topic.

🚀 How to Run & Use This Model (Step-by-Step Guide)

Simple setup instructions for everyday users and developers.

1

Sign Up & Get API Access

Create a account on Deepseek's official developer portal and obtain your API Key.

2

Try the Interactive Playground

Click the "Try Playground" button at the top of this page to test prompts instantly inside your web browser.

3

Send Your First Request

Use standard HTTP cURL requests or official Python/Node.js SDKs to send prompts to the endpoint.

4

Integrate Into Your App

Pass the model ID "openrouter-deepseek-deepseek-v3-1-terminus" into your code payload to power chatbots, workflows, and web applications.

Benchmark Performance

MMLU (Knowledge)79.5
GSM8K (Math)83.1
HumanEval (Coding)73.4
HellaSwag (Reasoning)85.9

Strengths

  • •Cloud API Endpoint
  • •Instant Inference
  • •Zero Hardware Setup

Limitations & Weaknesses

  • •Requires API Key & Per-Token Pricing
Integration Code (text-chat)
import openai

client = openai.OpenAI()

response = client.chat.completions.create(
    model="openrouter-deepseek-deepseek-v3-1-terminus",
    messages=[
        {"role": "system", "content": "You are an expert AI assistant."},
        {"role": "user", "content": "Explain quantum computing in 2 sentences."}
    ]
)

print(response.choices[0].message.content)

Pricing Overview

$0.27/1M in, $1.00/1M out

Prices subject to provider tiers and volume discounts. Check documentation for current token rates.

Model Tags

#cloud-api#openrouter#deepseek

Did this model work for you?

Your feedback helps others find the right model.

Similar Models from Deepseek

DeepSeek
Open Weights

DeepSeek-R1

Reasoning Model

DeepSeek-R1 - DeepSeek open-source frontier model for math, reasoning, and code.

Context Window128k
MATH / Code80
Cloud API Local Run
#deepseek#mit-license
DeepSeek
Open Weights

DeepSeek-R1-Zero

Reasoning Model

DeepSeek-R1-Zero - DeepSeek open-source frontier model for math, reasoning, and code.

Context Window128k
MATH / Code81
Cloud API Local Run
#deepseek#mit-license
DeepSeek
Open Weights

DeepSeek-V3

MoE LLM

DeepSeek-V3 - DeepSeek open-source frontier model for math, reasoning, and code.

Context Window128k
MATH / Code82
Cloud API Local Run
#deepseek#mit-license
ModelVault

Find a suitable AI model for your task, budget and hardware, with sources and practical setup guidance.

Curated recommendations · Source-backed specifications
ProductAll AI Models IndexComparison MatrixLocal Models (Ollama)Cloud API ModelsFind a modelLive API Telemetry ⚡WebGPU AI Playground 🎮AI Cost Calculator
ResourcesReasoning ModelsCoding AgentsVision-LanguageEmbeddings & RAG
Management & LegalAdmin Console ↗Privacy PolicyTerms of ServiceDisclaimerAbout ModelVaultContact Us
© 2026 ModelVault AI Directory. Review model sources before deployment.
Made with❤️by Gaurav Kushwaha
Built for high-performance AI workflows