Model X-Ray — case studies - a tetracta Collection

tetracta 's Collections

Model X-Ray — case studies

Model X-Ray — case studies

updated 8 days ago

Layer-by-layer scans of open checkpoints: what fine-tuning, quantization and merging actually change. Free open beta at tetracta.ai/xray.html

tetracta/llm-xray-twin-study-1b

Updated 3 days ago • 2

Note Twin study: same data, two architectures — structural portraits
Qwen/Qwen2.5-3B

Text Generation • 3B • Updated Sep 20, 2024 • 317k • • 202

Note Case study subject (base) — see the layer map in our scan
Qwen/Qwen2.5-3B-Instruct

Text Generation • 3B • Updated Sep 25, 2024 • 5.97M • • 564

Note Scanned vs base: change starts at layer 4, ~89% of depth; 0 facts broken; fabrication-avoidance 13/20 -> 18/20 (discussion #19)
tetracta/llm-xray-lesion-scans

Viewer • Updated 3 days ago • 6 • 159 • 1

Note Lesion scans: controlled damage, measured response
Running

Model X-Ray — sample reports (Part 3, 7 September 2026, Europe/Istanbul)

🩻

Compare two AI model versions and locate their differences

Note Sample reports, exactly as the tool produces them (trial watermark included)