Together AI's $800M Round Signals Open-Source AI's Rise
Together AI raised $800 million at an $8.3 billion valuation, according to Reuters, one of the largest bets yet on open-source AI infrastructure. The round signals that investors see real, durable demand in helping companies run open-weight models outside the big proprietary labs. It's a sign that vendor lock-in has become a boardroom-level risk, not just an engineering preference. For PMs, it means the case for open-source model infrastructure, on cost and control, just got a lot harder to ignore.