> Qwen3-4B is an open-weights AI model from Alibaba, released 29 Apr 2025.

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# Qwen3-4B

Alibaba

Released 29 Apr 2025

Open

[Compare](https://themodelindex.org/compare/qwen3-4b-vs-o3-2025-04/)

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Index score

Not yet evaluated independently

1/ 8

Core tests taken

1 of 6 areas · plus 0 anchor tests

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Versus the frontier at release

Replaced by [Qwen3.5-4B](https://themodelindex.org/models/qwen3-5-4b/)

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Price per million tokens

no public API price found

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Context window

tokens it reads at once

## Where it sits · on the frontier

_Chart: Model Index score of every scored model since late 2022, with the best closed and best open model over time_

o1-mini reached this score 8 months earlier.

## Test results · by area · tick = best by any model

Reasoning & knowledge

evidence

GPQA Diamond

52%

Humanity's Last Exam

no result

Maths

no evidence yet

FrontierMath T1-3

no result

Coding

no evidence yet

SWE-bench Verified

no result

Terminal-Bench

no result

Agents

no evidence yet

APEX-Agents

no result

Novel problems

no evidence yet

ARC-AGI-2

no result

Long tasks

no evidence yet

METR time horizon

no result

Independent results from the Epoch AI benchmarking hub, best reasoning setting. The core tests are shown here; anchor tests also inform the score and can be shown above.

## What others say · rank on each leaderboard

Not on any of the rankings we follow yet.

Further left is better. Leaderboards measure different things: LMArena is people voting blind between two answers, the others are test scores. Click any row for the source.

## Best at · top three among current models

Replaced by Qwen3.5-4B; it no longer leads any category among current models.

Where this model places in the top three of today's models, on category leaderboards and on our core tests.

## Where to use it · prices checked 1 Oct 2026

#### From the lab

Qwen Chat

app · subscription

↗

Alibaba Cloud Model Studio

API

↗

Provider prices come from OpenRouter's live listing; going direct to a provider can differ. Subscriptions are the lab's own apps.

## Facts and sources

Released

29 Apr 2025

Announcement

not linked yet

Release entry

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Scored as

Qwen3-4B

Artificial Analysis index

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Output speed

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Hugging Face

not linked

## Alibaba releases · around this one

Qwen

Closed

11 APR 2023

Tongyi Qianwen

Closed

11 APR 2023

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Source: https://themodelindex.org/models/qwen3-4b/ · The Model Index · data as of 2026-10-01