# Qwen2.5 LLM series open-sourced, 0.5B to 72B parameters

> Qwen open-sourced seven decoder-only dense models in the Qwen2.5 series, spanning 0.5B to 72B parameters. The release targets production use (10-30B range) and mobile applications (3B).

| | |
|---|---|
| **Tool** | Qwen |
| **Version** | — |
| **Kind** | announcement |
| **Published** | 2024-09-18 |
| **Observed** | 2026-08-11 |
| **Significance** | 5/5 |
| **Breaking** | no |
| **Categories** | new-model, feature |

## What changed


- Seven decoder-only dense models open-sourced
- Size range: 0.5B to 72B parameters
- 10-30B range aimed at production use cases
- 3B models aimed at mobile applications


## Sources

- [blog_rss](https://qwenlm.github.io/blog/qwen2.5-llm/) — retrieved 2026-08-11


## Community

_No curated reactions recorded. Facts and community takes are kept in separate layers
and never blended._

---
Canonical: https://changelogs.info/qwen/qwen2-5-llm-series-open-sourced-0-5b-to-72b-parameters
Entity: https://changelogs.info/qwen
Event ID: `evt_2024-09-18_qwen_qwen2-5-llm-extending-the-boundary-of-llms`
Licence: event synthesis © changelogs.info, CC BY 4.0. Linked sources belong to their vendors.