Baseten's Charlie O'Neill predicts 3 to 5 new two-to-four-trillion-parameter open source models in the next 6 months: "The baseline is now, okay, your frontier offering needs to be a multi-trillion parameter model that is engineered for long-running work and long-running tasks. And to be useful to the open source ecosystem, it needs to be geared around post-training." "Inkling from Thinking Machines is a great example. They've explicitly said the design of the model's capabilities was to make…