DeepSeek-V3.1 Terminus API

DeepSeek-V3.1 is the latest advanced LLM with improved architecture and performance across various natural language tasks.

Modalities
TextText
In / Out price
$0.2857/$1.06per 1M
Context window
125K tokens
Released
Aug 28, 2025

DeepSeek-V3.1 Terminus overview

The pelican test: one prompt, every text model, unedited SVG output from Nov 3, 2026.

SVG of a pelican riding a bicycle, written by DeepSeek-V3.1 Terminus through AI/ML API

DeepSeek-V3.1 Terminus specs

Model ID
deepseek/deepseek-non-reasoner-v3.1-terminus
Developer
DeepSeek
Context window
128,000 tokens
Max output
8,000 tokens
Input
Text
Output
Text
API
OpenAI-compatible, base URL https://api.aimlapi.com/v1

DeepSeek-V3.1 is the latest advanced LLM with improved architecture and performance across various natural language tasks.

Coding and code review
Generate, debug, and review code across languages, reading whole files or repos in a single prompt.

Agentic and multi-step workflows
Reliable tool-calling and instruction-following suit agent loops that plan, call tools, and iterate.

Long-document analysis
Summarize and extract from contracts, papers, and reports without aggressive chunking.

Use cases

  • Fast customer support and chatbot responses
  • Multilingual marketing copy and content generation
  • Automated coding assistance and script execution
  • Knowledge base querying with long context
  • Tool-assisted task automation workflows
  • Quick summarization of long documents without deep explanation

Capabilities

  • Streaming
  • Structured outputs
  • Function calling

DeepSeek-V3.1 Terminus benchmarks by Artificial Analysis

See how DeepSeek-V3.1 Terminus scores on independent evaluations. Data retrieved Nov 3, 2026.

Benchmark results

Compare 7 models available on AI/ML API across 5 independent benchmarks.

Humanity's Last Exam

Expert-written questions across academic subjects.

DeepSeek-V3.1 Terminus API pricing

DeepSeek-V3.1 Terminus pricing in US dollars
UsagePriceUnit
Input$0.28571M tokens
Output$1.061M tokens
Cached input$0.28571M tokens

Prices from the AI/ML API price list, checked on Nov 4, 2026.

DeepSeek-V3.1 Terminus vs other models: token prices

AI/ML API input and output rates for 5 models, per million tokens.

AI/ML API model prices in USD per million tokens
ModelInputOutput
DeepSeek-V3.1 Terminus$0.2857$1.06
DeepSeek Chat (V4.1 Flash)$0.3$1.2
DeepSeek V4.1 Flash$0.3$1.2
DeepSeek V4 Flash Vision Exp$0.44$1.32
DeepSeek V4.1 Flash 1017$0.39$1.56

How to use the DeepSeek-V3.1 Terminus API

View docs

Build with your agent

Give your agent the model details, code and documentation.

1Get your API key

Create API key
export AIMLAPI_KEY="8f2b4c7d9a1e6b3f…"

2Make your first request

curl 'https://api.aimlapi.com/v1/chat/completions' \
  -H "Authorization: Bearer $AIMLAPI_KEY" \
  -H 'Content-Type: application/json' \
  -d '{
  "model": "deepseek/deepseek-non-reasoner-v3.1-terminus",
  "messages": [
    {
      "role": "user",
      "content": "Write a haiku about the ocean."
    }
  ]
}'

Related articles

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DeepSeek-V3.1 Terminus FAQ

What is the context window of DeepSeek-V3.1 Terminus?

DeepSeek-V3.1 Terminus has a 128,000 tokens context window and can return up to 8,000 tokens.

What inputs and outputs does DeepSeek-V3.1 Terminus support?

DeepSeek-V3.1 Terminus takes text as input and returns text.

What is the model ID for DeepSeek-V3.1 Terminus?

Use deepseek/deepseek-non-reasoner-v3.1-terminus as the model id. Requests go to https://api.aimlapi.com/v1/chat/completions.

How much does DeepSeek-V3.1 Terminus cost?

DeepSeek-V3.1 Terminus costs $0.2857 input and $1.06 output per 1M tokens on AI/ML API, billed as you go with no subscription.

Does DeepSeek-V3.1 Terminus support streaming?

Yes, DeepSeek-V3.1 Terminus can stream responses as they are generated.

Who created DeepSeek-V3.1 Terminus?

DeepSeek-V3.1 Terminus was built by DeepSeek.

Start building with DeepSeek-V3.1 Terminus

DeepSeek-V3.1 Terminus API

deepseek/deepseek-non-reasoner-v3.1-terminus

Build with your agent

Give your agent the model details, code and documentation.

1Get your API key

Create API key
export AIMLAPI_KEY="8f2b4c7d9a1e6b3f…"

2Make your first request

curl 'https://api.aimlapi.com/v1/chat/completions' \
  -H "Authorization: Bearer $AIMLAPI_KEY" \
  -H 'Content-Type: application/json' \
  -d '{
  "model": "deepseek/deepseek-non-reasoner-v3.1-terminus",
  "messages": [
    {
      "role": "user",
      "content": "Write a haiku about the ocean."
    }
  ]
}'