Together AI raises $800M at $8.3B valuation to scale open-source AI

Key takeaway

• Together AI, which provides infrastructure to run open-source AI models cheaply and at scale, raised $800 million（約1300億円） at an $8.3 billion（約1.3兆円） valuation.

• The funding reflects surging demand from businesses seeking alternatives to expensive closed AI models—customers report cutting inference costs by 6x to 60x after switching to Together's platform, and open-source model usage across the industry has tripled in the past year.

3 Key Points

FAQ

What cost savings do Together AI customers see?

Customers report cost savings of 6x to 60x compared to closed-model pricing for equal or better performance. For example, Decagon cut inference costs sixfold after moving to Together.

Who are Together AI's customers?

The company now serves thousands of paying customers, including many of the biggest names in AI like Cursor, Cognition, and Decagon.

How fast is open-source AI adoption growing?

Open-source model usage across the industry has tripled in twelve months, and nearly three-quarters of organizations expect to increase their use of open-source AI according to McKinsey.