How much does Qwen3 4b cost?

Qwen3 4b is billed pay-as-you-go at $0.05 per 1M input tokens and $0.57 per 1M output tokens. There is no subscription — you only pay for what you use.

Is Qwen3 4b free to use?

Qwen3 4b is a paid, pay-as-you-go model — no subscription, you are only charged for usage.

How do I use Qwen3 4b via the API?

Qwen3 4b is OpenAI-compatible. Point any OpenAI SDK at https://api.airforce/v1 and pass the model ID qwen3-4b with your Api.Airforce API key.

Qwen3 4b is Alibaba's chat model, served through the unified Api.Airforce gateway alongside 100+ other models.

AlibabaPaidOperational

Qwen3 4b

API model name: qwen3-4b

Qwen3 4b is Alibaba's chat model, served on the Api.Airforce unified API. Capabilities include Reasoning. It is priced at $0.05 per million input tokens and $0.57 per million output tokens. That is below the provider's $0.04 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

$0.05

Output / 1M tokens

$0.57

Cache read / 1M tokens

$0.01

Official input rate

$0.04

Official output rate

$0.18

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

Specifications

Provider: Alibaba
Type: chat model

Capabilities

Reasoning

Benchmarks

Independent evaluations and measured speed from Artificial Analysis.

Measured atSame model, different reasoning effort.

Intelligence Index

8.2/100

Math Index

22.3/100

MMLU-Pro70%

GPQA Diamond52%

Humanity's Last Exam4%

LiveCodeBench47%

AIME 202522%

MATH-50093%

Qwen3 4B (Reasoning) · 6.5–8.2

Source: Benchmark data by Artificial Analysis (artificialanalysis.ai)

What is Qwen3 4b used for?

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

Qwen3 4b vs. similar models

Model	Intelligence	Context	Input / 1M	Output / 1M
Qwen3 4b	8.2	—	$0.05	$0.57
Qvq Max Latest	—	—	$0.84	$3.36
Qvq Plus	—	—	$0.28	$0.69
Qwen Coder Plus	—	—	$0.46	$0.91

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

Qwen3 4b — frequently asked questions

How much does Qwen3 4b cost?: Qwen3 4b is billed pay-as-you-go at $0.05 per 1M input tokens and $0.57 per 1M output tokens. There is no subscription — you only pay for what you use.
What can Qwen3 4b do?: Qwen3 4b supports Reasoning.
Is Qwen3 4b free to use?: Qwen3 4b is a paid, pay-as-you-go model — no subscription, you are only charged for usage.
How do I use Qwen3 4b via the API?: Qwen3 4b is OpenAI-compatible. Point any OpenAI SDK at https://api.airforce/v1 and pass the model ID qwen3-4b with your Api.Airforce API key.
Who makes Qwen3 4b?: Qwen3 4b is Alibaba's chat model, served through the unified Api.Airforce gateway alongside 100+ other models.

All models·Quickstart·Chat API reference

Use Qwen3 4b via the API

OpenAI-compatible — point any OpenAI SDK at https://api.airforce/v1 and pass qwen3-4b as the model.

cURL

curl https://api.airforce/v1/chat/completions \
  -H "Authorization: Bearer $AIRFORCE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "qwen3-4b",
    "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="qwen3-4b",
    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: "qwen3-4b",
  messages: [{ role: "user", content: "Hello!" }],
});
console.log(r.choices[0].message.content);