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Qwen3 4B InstructWork with me

Qwen3 4B Instruct

byQwen

Qwen3 4B Instruct is a reasoning model from Qwen released on Jul 31, 2025. It reads text and writes text, with a 33K token context window and up to 33K tokens per reply.

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It costs $0.20 per million input tokens and $0.20 per million output tokens. Cached input bills at $0.20, 0% less than fresh input.

It supports tool calling and prompt caching.

Modalities
In / out price
$0.20 / $0.20 per 1M
Context
33K
Max output
33K
Released
Jul 31, 2025
Knowledge cutoff
n/a
  • Tool calling
  • Structured output
  • Reasoning
  • Prompt caching
  • Open weights
  • Free to use

Qwen3 4B Instruct pricing

USD, as listed on Oct 15, 2026. Most bills are input heavy, so the cached input rate matters as much as the headline price.

Input$0.20 / 1M tokens
Output$0.20 / 1M tokens
Cached input (read)$0.20 / 1M tokens
Cache write$0.20 / 1M tokens

What Qwen3 4B Instruct costs per month

Pick a workload close to yours or type your own volumes.

Qwen3 4B Instruct per month
$17.10
Without caching
$17.10
Per request
$0.0006

Supported request parameters

What you can set when you call Qwen3 4B Instruct through an OpenAI compatible API.

  • Toolstools
  • Reasoningreasoning
  • Temperaturetemperature

Alternatives to Qwen3 4B Instruct

Models that take the same inputs and call tools, closest in price, cheaper ones first.

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    by openaiSep 22, 20261.05M context$0.10/M input tokens$0.50/M output tokens27 providers

  • Google: Gemma 4 26B A4B IT

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    by googleApr 1, 2026$0.13/M input tokens$0.40/M output tokens28 providers

  • Xiaomi: MiMo-V2.6-Flash

    Index 37.9

    Reads text, images, audio and video. Tool calling, structured output, reasoning. Served by 17 providers.

    by xiaomiSep 22, 20261.05M context$0.14/M input tokens$0.28/M output tokens17 providers

  • Google: Gemini 2.5 Flash-Lite

    Reads text, images, files, audio and video. Tool calling, structured output, reasoning. Served by 23 providers.

    by googleJun 17, 2025$0.10/M input tokens$0.40/M output tokens23 providers

  • OpenAI: GPT 6 Luna Pro

    Reads text, images and files. Tool calling, structured output, reasoning. Served by 2 providers.

    by openaiSep 22, 2026$0.10/M input tokens$0.50/M output tokens2 providers

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Qwen3 4B Instruct questions

How much does the Qwen3 4B Instruct API cost?

$0.20 per million input tokens and $0.20 per million output tokens, with cached input at $0.20. The estimator on this page turns that into a monthly bill for your own workload.

What is the context window of Qwen3 4B Instruct?

32,768 tokens of input, and it can write up to 32,768 tokens in one reply. As a rough guide, a million tokens is around 750,000 English words.

Does Qwen3 4B Instruct support tool calling?

Yes. It accepts tool definitions, which is what an agent needs to call your APIs.

Is Qwen3 4B Instruct open source?

No. Qwen serves it through an API only, so you cannot download the weights or host it yourself.

When was Qwen3 4B Instruct released?

Jul 31, 2025.

Catalog data from models.dev (MIT licensed), refreshed daily, last on Oct 15, 2026. The summary is written from these facts.

Building on Qwen3 4B Instruct?

I test your real tasks on it and the two closest alternatives, then ship the agent on whichever wins on cost and accuracy.

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