# Qwen2.5 foundation model family announced

> Qwen announced Qwen2.5, the successor to Qwen2, calling it the largest open-source release in their history. The raw announcement contains no details on model sizes, capabilities, or benchmarks.

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

## What changed


- Described as "the largest opensource release in history"
- No specific model sizes, capabilities, or benchmarks disclosed in this post


## Sources

- [blog_rss](https://qwenlm.github.io/blog/qwen2.5/) — 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-foundation-model-family-announced
Entity: https://changelogs.info/qwen
Event ID: `evt_2024-09-18_qwen_qwen2-5-a-party-of-foundation-models`
Licence: event synthesis © changelogs.info, CC BY 4.0. Linked sources belong to their vendors.