TL;DR. A public method called Model DNA — with a live tool — lets outsiders estimate whether an LLM was trained from scratch or derived from an open-weight base, using nothing but public artifacts: config. json , tokenizer.
Source: [Dev.to](https://dev.to/ai_maya_063fc568e157562fd/model-dna-analyzed-verifying-from-scratch-llm-claims-with-architecture-tokenizer-and-cka-2k4h)