Unsloth ships DeepSeek-V4.1-Flash-1017 dynamic GGUFs: a 250 GB 1-bit quant runs on 128 GB+ RAM, with the Engram table offloaded to SSD
On Oct 19 (UTC) Unsloth released dynamic GGUF quants and a run-locally guide for DeepSeek-V4.1-Flash-1017. Per Unsloth, the 1-bit UD-IQ1_M quant is 250.4 GB (vs 508.4 GB for lossless Q8), keeps 88.2% top-1 agreement with the official weights on long17k, and runs on 128 GB+ RAM machines, because the model's 110.6–202.8 GB Engram n-gram table can stay on SSD via mmap. Running it currently requires Unsloth's llama.cpp PR build or Unsloth Desktop.

Key Takeaways
- 1-bit UD-IQ1_M is 250.4 GB, about 51% smaller than lossless UD-Q8_K_XL (508.4 GB), with 88.2% top-1 agreement on long17k and 87.1% on wiki1100 (Unsloth-reported)
- The smallest UD-IQ1_S (233.0 GB) targets 128 GB RAM machines such as a Mac or DGX Spark at 82.8–85.1% agreement; 3-bit UD-IQ3_XXS needs ~256 GB (e.g. Mac Studio) at 94.6–95.1%
- The model pairs a 552B backbone with 196B Engram parameters; the 110.6–202.8 GB Engram n-gram table can stay on SSD via mmap, saving RAM but not disk
- Unsloth claims ~3x faster inference than other CPU/VRAM/ngram-focused repos on top of llama.cpp (vendor claim, no independent test yet)
- The Hugging Face repo is MIT-licensed with 9 quant levels from IQ1_S to Q8_K_XL plus standalone Engram files at different precisions