# lean-reason-heavy - leanmodels.ai

*Heavyweight class, v1.0, Qwen 3.5 base*

Near-frontier - deep reasoning, complex analysis, research

397B total, 17B active per token. Near-frontier reasoning from a massive expert pool, running entirely on your hardware.

## Specifications

- **Total params:** 397B
- **Active per token:** 17B
- **Base model:** Qwen3.5-397B-A17B
- **Architecture:** GDN hybrid MoE
- **Experts:** 256 experts, 8 active
- **Target VRAM / RAM:** 48 GB / 64 GB
- **Tier:** Paid

## Not yet verified

This model hasn't been benchmarked or verified on our hardware yet. Sizes and specs are targets, not measured results. No download or purchase until it clears the same verification the available models passed.

## Get the model

- **Download (target):** ~244.1 GB (single .lmpack, Q4_K_M)