Together AI, which offers access to open-source models, raised $800M led by Saudi Aramco's Prosperity7 at an $8.3B valuation, taking its total funding to $1.3B
Together AI, which specializes in open-source artificial intelligence models, is now worth more than $8 billion.
Context & Ripple Effects
Together AI has moved from funding for more efficient pre-training and fine-tuning of open-source foundation models to a broader AI-computing access business. Its valuation rose from $1.25B in its 2024 round to $3.3B in 2025, alongside continued backing from Prosperity7.
The new round substantially exceeds the financing and valuation discussed in March, when reports tied the company’s momentum to sharply higher annualized revenue. It gives Together AI far more capital to pursue that growth path.
First-order effects
- Together AI gains $800M of additional capacity to fund compute infrastructure and its platform for training, fine-tuning, and serving open-source models; total disclosed funding reaches $1.3B.
- Prosperity7 deepens its role as a repeat backer, while the $8.3B valuation resets the financial benchmark for the company after its $3.3B valuation in 2025.
Second-order effects
- The financing strengthens Together AI’s ability to compete for customers and infrastructure access in the market for AI compute and managed open-source-model services, raising the pressure on similarly positioned providers to demonstrate growth or secure capital.
- A larger, well-funded intermediary for open models can give developers another route to Nvidia-based training capacity and model tooling, rather than building those capabilities entirely in-house.
Third-order effects
- If revenue growth and funding continue to reinforce each other, the open-model ecosystem may increasingly be organized around capital-intensive platforms that package compute, training, and fine-tuning rather than around model access alone.
- Repeat investment from a Saudi-linked fund points to the growing strategic role of large pools of patient capital in AI infrastructure; whether that produces durable market concentration will depend on customer retention and the cost of supplying compute.
The trend: This is one data point in the capitalization of open-source AI into full-stack compute platforms, where access to infrastructure and financing increasingly determines who can commercialize open models at scale.