> Wasn't LLaMA or Llama 2 the first ever open weight LLM through a leak

No. GPT-2, I think, was the first, four(ish) years before Llama, and there were a bunch in between GPT-2 and the Llama leak and later open release. The Llama leak was a substantial leap forward in capacity for local LLMs, but not the first, and it wasn’t open.

The open licensed release was Llama 2 several months after the Llama leak.