# Together AI raises $800M at $8.3B valuation for open-source AI inference

> Together AI has raised an $800 million Series C led by Aramco Ventures, vaulting the company to an $8.3 billion valuation on the strength of a simple wager: that enterprises increasingly want to run open-source models themselves rather than rent closed ones from the big labs. The company says annual bookings have already passed $1.15 billion, a figure that helps explain why investors including Nvidia, General Catalyst and Vista Equity piled in. Together's platform lets companies deploy and scale open models cheaply, competing directly on price with the frontier labs' premium APIs. As open models keep closing the quality gap, the economics get more attractive: why pay top-tier per-token rates when a capable open alternative running on efficient infrastructure does the job for less. The presence of Aramco Ventures as lead is its own signal, tying oil-money capital to the compute-and-energy hungry future of AI. The round is another data point in one of this year's clearest trends, the steady rise of an open-source inference economy positioned as the pragmatic, cost-conscious counterweight to the closed frontier.

_Section: [AI Funding Tracker](https://www.wortins.com/funding) · Source: Tech Funding News · Published Tuesday, September 1, 2026_

## Wortins' read

Together AI has raised an $800 million Series C led by Aramco Ventures, vaulting the company to an $8.3 billion valuation on the strength of a simple wager: that enterprises increasingly want to run open-source models themselves rather than rent closed ones from the big labs. The company says annual bookings have already passed $1.15 billion, a figure that helps explain why investors including Nvidia, General Catalyst and Vista Equity piled in. Together's platform lets companies deploy and scale open models cheaply, competing directly on price with the frontier labs' premium APIs. As open models keep closing the quality gap, the economics get more attractive: why pay top-tier per-token rates when a capable open alternative running on efficient infrastructure does the job for less. The presence of Aramco Ventures as lead is its own signal, tying oil-money capital to the compute-and-energy hungry future of AI. The round is another data point in one of this year's clearest trends, the steady rise of an open-source inference economy positioned as the pragmatic, cost-conscious counterweight to the closed frontier.

## Source

[Read the full story at Tech Funding News](https://techfundingnews.com/together-ai-raises-800m-at-8-3b-valuation-as-enterprises-ditch-closed-models-for-open-source/)

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