# Qwen2.5

Qwen2.5 is an AI model released by Qwen on Sep 19 2024. It has 72B parameters, a 128k context window and open weight.

## Facts

| Field | Value |
| --- | --- |
| Model | Qwen2.5 |
| Developer | Qwen |
| Release date | Thursday, Sep 19 2024 |
| Licensing | Open Weight |
| Parameters | 72B |
| Context window | 128k |

## About Qwen2.5

Qwen2.5, released September 19, 2024, was the generation that made Qwen the default open-weight base model for the wider research community. It filled in the size ladder with 3B, 14B and 32B alongside the existing 0.5B, 1.5B, 7B and 72B, so there was a Qwen checkpoint sized for almost any deployment budget, and it shipped with a 128K-token context window across the line.

Licensing was the other half of the story: everything except the 72B flagship and the 3B model went out under Apache 2.0, which made Qwen2.5 far easier to build commercial products on than the Llama licence allowed. Alibaba released Qwen2.5-Coder and Qwen2.5-Math the same day, and by the time Qwen3 arrived the following April, Qwen2.5 derivatives and fine-tunes outnumbered those of any other base model family on Hugging Face.

## Questions and answers

### When was Qwen2.5 released?

Qwen2.5 was released by Qwen on Thursday, Sep 19 2024.

### Who made Qwen2.5?

Qwen2.5 was built by Qwen. Alibaba's AI lab, building the Qwen family. The most prolific publisher of open-weight models of any major lab, alongside a proprietary Max and Plus tier sold through Alibaba Cloud.

### What is the context window of Qwen2.5?

Qwen2.5 has a context window of 128k. That is the maximum amount of input plus output the model can hold in a single request.

### How many parameters does Qwen2.5 have?

Qwen2.5 is reported at 72B parameters.

### Is Qwen2.5 open source?

Partly. Qwen2.5 is an open-weight model: the trained weights are free to download and run locally or on your own infrastructure, but the training data and code are not fully released and the license may restrict some commercial uses. It is not open source in the strict sense.

### What came before and after Qwen2.5?

Qwen's previous tracked release was Qwen2 on Jun 6 2024, 105 days earlier. It was followed by Qwen2.5-Coder on Nov 12 2024.


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Canonical page: https://aireleasetracker.com/model/qwen/qwen2.5
Full dataset: https://aireleasetracker.com/llms-full.txt · JSON: https://aireleasetracker.com/models.json
Source: AI Release Tracker (https://aireleasetracker.com). Benchmark scores are the figures published by the releasing lab at launch.