If you were to imagine the kind of startup likely to snag the largest seed round of all time, it would probably look something like Thinking Machines Lab. Launched and led by former OpenAI CTO Mira Murati, and joined by AI heavy hitters from Meta, OpenAI, Google and Mistral AI, the San Francisco company certainly has a founding team that investors ought to like. And given prevailing valuations for  leading AI unicorns, a $2 billion seed deal doesn’t even sound that big in context. In reality, ho...