# Saif 4B v2 decision model by GyrTechnology > Saif 4B v2 is a Qwen3.5-4B decision fine-tune with public weights. Read its non-commercial licence, typed questions and reported benchmark results. Updated 2026-11-07 (Australia/Adelaide) ## Quick answers ### What is Saif 4B v2 by GyrTechnology? [Saif 4B v2](): A Qwen3.5-4B full decision fine-tune that returns probabilities for typed questions in one forward pass. [Saif 4B v2 facts]() [Source]() ### Who makes Saif 4B v2? [Saif 4B v2](): GyrTechnology [Saif 4B v2 facts]() [Source]() ### Are Saif 4B v2's weights open? [Saif 4B v2](): Public decision weights, runtime and Decision Index engine Licence: CC BY-NC 4.0; non-commercial [Saif 4B v2 facts]() [Source]() By GyrTechnology · v2 decision-only package release: 2026-11-05 · NON-COMMERCIAL A Qwen3.5-4B full decision fine-tune that returns probabilities for typed questions in one forward pass. The v2 release replaces the earlier full-model files with a decision-only package; v1 remains tagged. Its licence restricts use to non-commercial purposes because some training sources are research-only. ## Facts - Base: Qwen/Qwen3.5-4B - Inputs: Text state; choice, noul and score - Licence: CC BY-NC 4.0; non-commercial - Access: Public decision weights, runtime and Decision Index engine ## Claims and sources - **VENDOR-REPORTED**: GyrTechnology reports 57.71 chance-corrected skill and 68.61 raw on the complete public Decision Index 0.3 suite, with no unsupported requests. This is the maker’s run, not an independently reproduced full-index rank. [source]() ## Links - [Source: Model card and files]() [Other models by GyrTechnology: Saif 0.8 Lightening]() ## Related projects No related projects are listed in the registry.