The breakneck pace of developing more sophisticated LLMs appears to have also hit a proverbial brick wall at Google, in which its Gemini software has not lived up to expectations, according to sources, adding Anthropic also faces challenges with its long-awaited Claude model called 3.5 Opus.

Bloomberg noted one of the top obstacles these tech firms have encountered has been "finding new, untapped sources of high-quality, human-made training data that can be used to build more advanced AI systems."