That may reduce the ability of developers to customise its models. It is better than nothing, though. This also raises the question of whether or not Meta might change its approach, leaving developers that rely on its models high and dry. Meta is not a charity, and building LLMs can be costly. Investors have shown in their hostile reaction to Mr Zuckerberg's metaverse ambitions that, despite his control of the company's voting shares, he does not have a blank cheque to splurge on whatever he likes. If Meta does not get the commercial benefits it expects, it may be forced to reconsider its approach. Openness, meanwhile, raises two big safety concerns. The first is harm-prevention. Though Meta has probed Llama 3.1 for dangers, the bigger models get, the more risk there is that they could go rogue or be misused. Once released, such models do not have a kill switch. That, in turn, raises the issue of liability. Who bears responsibility if these models fall into the hands of bad actors?