Microsoft's 2023 OpenAI expansion was not simply an equity bet. It tied frontier-model development to Azure supercomputing, cloud distribution, product integration, and a commercial relationship that kept evolving as both companies grew.
Stability AI's $101 million 2022 round showed how quickly open-model excitement could create a unicorn. It also exposed the harder economics of turning widely distributed open technology into durable revenue and organizational stability.
Inflection AI's $1.3 billion 2023 round financed a vertically integrated personal-AI company with its own giant compute cluster. Less than a year later, Microsoft hired much of the founding team, turning the deal into a cautionary case about financing talent, models, and product at once.