AI21 Labs, an Israeli generative AI company, today announced its latest large language model (LLM), called Jurassic-2. Up till now, the base model of AI21 Labs has been Jurassic-1, the largest version of which has 178 billion parameters. That made it among the largest LLMs on the market -- slightly bigger than OpenAI's 175B parameter GPT-3 davinci model. However, when I spoke this week to AI21 Labs co-founder and co-CEO, Ori Goshen, he was reluctant to tell me how large Jurassic-2 is. LLM size "plays a factor, but it's not the only factor," said Goshen. "So we've stopped referring to the size, because it can be misleading about the actual performance of the model."