DeepSeekPaidOperational

DeepSeek V3.1 Think

API model name: deepseek-v3-1-think-250821

DeepSeek V3.1 Think is DeepSeek's chat model, served on the Api.Airforce unified API. Capabilities include Reasoning. It is priced at $0.62 per million input tokens and $1.87 per million output tokens. That is below the provider's $0.59 official input rate. Access it through the OpenAI-compatible API with one key, alongside 100+ other models on Api.Airforce.

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Pricing

Input / 1M tokens

$0.62

Output / 1M tokens

$1.87

Cache read / 1M tokens

$0.11

Official input rate

$0.59

Official output rate

$1.78

Api.Airforce price vs. the provider's official rate.

Specifications

Provider: DeepSeek
Type: chat model

Capabilities

Reasoning

What is DeepSeek V3.1 Think used for?

Chatbots & assistants — conversational AI, drafting, summarizing and Q&A.
Complex reasoning — math, coding and step-by-step problem solving.

DeepSeek V3.1 Think vs. similar models

Model	Intelligence	Context	Input / 1M	Output / 1M
DeepSeek V3.1 Think	—	—	$0.62	$1.87
DeepSeek	—	—	$0.44	$1.72
DeepSeek Chat	—	—	$2.31	$3.47
DeepSeek OCR	—	—	$0.07	$0.29

Prices are Api.Airforce pay-as-you-go rates per 1M tokens. Context is the maximum input length.

Related models

DeepSeekDeepSeek · $0.44 / 1M DeepSeek ChatDeepSeek · $2.31 / 1M DeepSeek OCRDeepSeek · $0.07 / 1M DeepSeek R1DeepSeek · $1.41 / 1M DeepSeek R1DeepSeek · $1.14 / 1M DeepSeek R1DeepSeek · $1.32 / 1M DeepSeek ReasonerDeepSeek · $0.89 / 1M DeepSeek V3DeepSeek · $0.38 / 1M DeepSeek V3DeepSeek · $0.25 / 1M DeepSeek V3DeepSeek · $0.66 / 1M DeepSeek V3.1DeepSeek · $0.62 / 1M DeepSeek V3.1 TerminusDeepSeek · $0.61 / 1M

DeepSeek V3.1 Think — frequently asked questions

How much does DeepSeek V3.1 Think cost?: DeepSeek V3.1 Think is billed pay-as-you-go at $0.62 per 1M input tokens and $1.87 per 1M output tokens. There is no subscription — you only pay for what you use.
What can DeepSeek V3.1 Think do?: DeepSeek V3.1 Think supports Reasoning.
Is DeepSeek V3.1 Think free to use?: DeepSeek V3.1 Think is a paid, pay-as-you-go model — no subscription, you are only charged for usage.
How do I use DeepSeek V3.1 Think via the API?: DeepSeek V3.1 Think is OpenAI-compatible. Point any OpenAI SDK at https://api.airforce/v1 and pass the model ID deepseek-v3-1-think-250821 with your Api.Airforce API key.
Who makes DeepSeek V3.1 Think?: DeepSeek V3.1 Think is DeepSeek's chat model, served through the unified Api.Airforce gateway alongside 100+ other models.

All models·Quickstart·Chat API reference

Use DeepSeek V3.1 Think via the API

OpenAI-compatible — point any OpenAI SDK at https://api.airforce/v1 and pass deepseek-v3-1-think-250821 as the model.

cURL

curl https://api.airforce/v1/chat/completions \
  -H "Authorization: Bearer $AIRFORCE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "deepseek-v3-1-think-250821",
    "messages": [{ "role": "user", "content": "Hello!" }]
  }'

Python

from openai import OpenAI
client = OpenAI(base_url="https://api.airforce/v1", api_key="$AIRFORCE_API_KEY")
r = client.chat.completions.create(
    model="deepseek-v3-1-think-250821",
    messages=[{"role": "user", "content": "Hello!"}],
)
print(r.choices[0].message.content)

JavaScript

import OpenAI from "openai";
const client = new OpenAI({ baseURL: "https://api.airforce/v1", apiKey: process.env.AIRFORCE_API_KEY });
const r = await client.chat.completions.create({
  model: "deepseek-v3-1-think-250821",
  messages: [{ role: "user", content: "Hello!" }],
});
console.log(r.choices[0].message.content);