Ornith-1.5-397B: hardware requirements
Ornith-1.5-397B needs about 248 GB of memory at Q4 quantization — a 244 GB download plus room for context and overhead. That is beyond consumer hardware; use it through an API instead.
This is a mixture-of-experts model. Only a fraction of its 403B parameters are used for each token, so it runs faster than its size suggests — but all of it still has to fit in memory. The speed is that of a small model; the memory requirement is that of a large one. More on this →
Will it run on your machine?
Download sizes by quantization
Lower quantization means a smaller file and less memory, at some cost to quality. Q4_K_M is the usual starting point. What is this?
| Quant | Download | RAM @ 4K | RAM @ 32K | Source |
|---|---|---|---|---|
| Q4_K_Mrecommended | 244 GB | 248 GB | 252 GB | measured |
| Q5_K_M | 286 GB | 290 GB | 294 GB | measured |
| Q6_K | 331 GB | 335 GB | 338 GB | measured |
| Q8_0 | 429 GB | 432 GB | 436 GB | measured |
| BF16 | 807 GB | 811 GB | 814 GB | estimated |
“Measured” sizes are read from published GGUF files (ornith-ai/Ornith-1.5-397B-GGUF). “Estimated” sizes are derived from the parameter count and are typically within a few percent. The RAM columns add the context cache and runtime overhead to the download size.