---
name: Qwen3.5 4B
slug: qwen-3-5-4b
type: Multimodal
providers:
  - qvac
  - empiriolabs
  - siliconflow-cn
description: >-
  Qwen3.5 4B is a low-cost multimodal reasoning model with 256K context, image
  and video input, function tools, and structured output.
tags:
  - open-source
  - reasoning
  - tool-use
  - multimodal
  - qwen
is_open_source: true
context_window: 262144
max_output: 65536
pricing:
  - image: 0
    input: 0.04
    output: 0.07
    provider: empiriolabs
  - image: 0
    input: 0
    output: 0
    provider: qvac
  - image: 0
    input: 0
    output: 0
    provider: siliconflow-cn
release_date: '2026-03-02'
capabilities:
  audio: false
  vision: true
  tool_use: true
  citations: false
  reasoning: true
---
Qwen3.5 4B is a Multimodal model.
Qwen3.5 4B is a low-cost multimodal reasoning model with 256K context, image and video input, function tools, and structured output.