# Qwen3.5 4B

Qwen3.5 4B is a model from Alibaba with open weights, first recorded on 7 Oct 2026; its release date is not established. The context window is 262,144 tokens.

- Developer: Alibaba
- Id: Qwen/Qwen3.5-4B
- Sighting: 2026-10-07T19:40:57.899Z
  - [evidence link](https://huggingface.co/Qwen/Qwen3.5-4B)
- Status: Released
- Weights version: 2026-02-27
  - [evidence link](https://huggingface.co/api/models/Qwen/Qwen3.5-4B/paths-info/851bf6e806efd8d0a36b00ddf55e13ccb7b8cd0a)
- Canonical: https://alexgetman.com/models/alibaba/qwen3-5-4b/

## Questions

### What is the context window of Qwen3.5 4B?

The context window is 262,144 tokens.

### Are the weights of Qwen3.5 4B publicly available?

Yes. Alibaba publishes the weights.

### When was Qwen3.5 4B released?

Its release date is not established. Signal Forge first recorded it on 7 Oct 2026.

## Timeline

**Confirmed use**
- 2026-11-13T17:22:10.244Z · [Qwen · official article bodies · Qwen-Robot Suite: A Foundation Model Suite for Physical World Intelligence](https://qwen.ai/blog?id=5a7f82b6-fcdf-4358-a92f-d6975ccb7cad)
> Qwen-RobotManip, built on Qwen3.5-4B VL with a flow-matching DiT action head, introduces three mechanisms to solve this

## Evidence links

- [review](https://huggingface.co/Qwen/Qwen3.5-4B)
- [hf-author-artifacts:Qwen](https://huggingface.co/api/models/Qwen/Qwen3.5-4B/paths-info/851bf6e806efd8d0a36b00ddf55e13ccb7b8cd0a)
- [Qwen · official article bodies · Qwen-Robot Suite: A Foundation Model Suite for Physical World Intelligence](https://qwen.ai/blog?id=5a7f82b6-fcdf-4358-a92f-d6975ccb7cad)

## Signals