Blockchains can support AI in multiple ways. They can host smart contracts that allow autonomous agents to hold funds and operate according to specific rules. They can also coordinate networks of independent computers that provide computing power or machine learning models. They can additionally record transactions and outputs in a transparent, verifiable way.
Because these tasks differ, most projects focus on one part of the technology stack. Some provide raw computing power, some run AI markets, while others build general-purpose networks where developers create agent-based applications. Understanding which layer you need is the first step in choosing a chain.