Tech entrepreneurs seeking the next AI frontier are pivoting from chatbots to 'world models'
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Finance
June 26, 2026
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Computer scientist Louis Castricato was in his eighth year studying large-language models (LLM) â the artificial intelligence technology behind chatbots like ChatGPT and Claude â when he started to feel like he was hitting a dead end.
"We basically have passed the point of doing real fundamental LLM research," Castricato said. "Now it's just applications."
The researcher quit his doctoral studies at Brown University and started a new company, called Overworld. Its ambition is in its name: AI that can understand and navigate a world, not just words.
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