# Announcing our $800M Series C to accelerate the shift to open-source AI

DevFeed: [Announcing our $800M Series C to accelerate the shift to open-source AI](<https://devfeed.tech/articles/announcing-our-800m-series-c-to-accelerate-the-shift-to-open-source-ai-80158.md>)

Original publisher: [Read original article](<https://www.together.ai/blog/announcing-our-series-c>)

Author: Vipul Ved Prakash

Published: 2026-07-01T00:00:00Z

Content type: news

Language: en

Sources: [Together.ai](<https://devfeed.tech/sources/together-ai.md>)

Topics: [Open Source Models & Datasets](<https://devfeed.tech/topics/open-source-models-datasets.md>), [Open Source](<https://devfeed.tech/topics/open-source.md>)

Tags: [ai](<https://devfeed.tech/tags/ai.md>), [apis](<https://devfeed.tech/tags/apis.md>), [blackwell](<https://devfeed.tech/tags/blackwell.md>), [capacity](<https://devfeed.tech/tags/capacity.md>), [compilers](<https://devfeed.tech/tags/compilers.md>), [compute](<https://devfeed.tech/tags/compute.md>), [cost](<https://devfeed.tech/tags/cost.md>), [developers](<https://devfeed.tech/tags/developers.md>), [flashattention](<https://devfeed.tech/tags/flashattention.md>), [funding](<https://devfeed.tech/tags/funding.md>), [models](<https://devfeed.tech/tags/models.md>), [open-source](<https://devfeed.tech/tags/open-source.md>), [series-c](<https://devfeed.tech/tags/series-c.md>)

## AI overview

Together AI announced an $800 million Series C and plans to expand compute capacity for its open and custom AI platform. The company argues that inference costs can become unsustainable as AI applications move from prototypes into production, and says open-weight models and optimization across the inference stack can lower costs while maintaining performance. It cites a customer that reduced inference costs sixfold after moving to its platform.

## Source excerpt

We raised $800M to accelerate the shift to open-source AI. Here's why the economics of closed models don't scale, and what we're building next.