Together AI just raised $800M at $8.3B. Open-source AI just ate your closed-model budget.

Together AI closed an $800M Series C yesterday at an $8.3B valuation.

Aramco Ventures led. NVIDIA, Vista Equity, and General Catalyst followed.

Here's why your CFO cares: $1.15B in annual bookings. Customers running open-source models on Together's platform are paying 6x to 60x less than closed-model equivalents.

Decagon cut inference costs sixfold by migrating off proprietary APIs.

Open-source model usage has tripled in 12 months across the industry. McKinsey says nearly three-quarters of organizations plan to increase open-source AI adoption.

Together is planning 50x capacity growth over five years. Investors committed 500 MW of compute capacity on top of the equity.

The structural shift is simple. Three years ago, enterprises bought closed models because they had no alternative. Today, open models like DeepSeek, Nemotron, and Kimi match or beat frontier performance at a fraction of the cost.

Microsoft, OpenAI, and Anthropic are now spending billions embedding engineers inside customer orgs because they know: the model is no longer the moat. Deployment is.

If you're locked into a single-vendor AI contract with usage-based pricing, your cost curve is about to break. Audit your inference spending today. Run a parallel test on open models. The gap between what you're paying and what you could be paying is now measured in multiples, not percentages.

SOURCE: https://theaiinsider.tech/2026/07/02/together-ai-raises-800m-at-8-3b-valuation-to-make-frontier-ai-accessible-to-all
VERIFIED: TechCrunch, SiliconANGLE, TheSaaSNews, AI Insider
SIGNAL: The $8.3B valuation for an open-source AI inference company signals the enterprise cost crisis with closed-model APIs has reached a tipping point. Your AI vendor's pricing power just collapsed.