Architecture
Retrieved 2026-09-13 at pinned commit cc594898137f; parameter count from the safetensors index at the same revision.
- Architecture
- qwen2_5_vl
- Layers
- 28
- Hidden size
- 3,584
- Attention heads
- 28
- KV heads
- 4
- Feed-forward width
- 18,944
- Vocabulary
- 152,064
- Context ceiling
- 128,000
- Sliding window
- 32,768
- RoPE theta
- 1,000,000
Where the memory goes
Grouped-query attention shares each key/value head across 7 query heads, so the KV cache is 14% of what multi-head attention would need at the same context.
This is a multimodal checkpoint (vision); the diagram and memory sizing above cover the text decoder. Encoder/audio/image activations are not included in the KV or weight figures.