Together AI announces strategic partnership with Moonshot AI to natively serve Kimi models

Kimi K3, Moonshot AI's 2.8-trillion-parameter open model is live on Together AI, with a commitment to land all future open Moonshot models.

40+ Models Chosen for Production...40+ Models Chosen for Production...40+ Models Chosen for Production...

Today we're announcing a strategic partnership with Moonshot AI, one of the leading model labs pushing the open source frontier with large-scale MoE architectures. Under this partnership, Together AI becomes a launch platform for Moonshot's model releases, starting with Kimi K3 and extending to every open weights model Moonshot ships going forward.

For developers building on open models, this means day zero access to Moonshot's frontier releases through Together AI’s US-hosted infrastructure, pricing model, and tooling, while ensuring zero data retention and compliant access to models and data. Developers can also post train these models with their own data to deliver the quality and performance for their app.

Kimi K3 is the largest open model released to date: a 2.8T parameter sparse Mixture-of-Experts model with native vision support and a 1M token context window. Moonshot built it around two new architectural components:

Layered on top are a set of optimizer refinements, including per-head Muon and quantile-based expert load balancing, that Moonshot says combine to deliver roughly 2.5x better scaling efficiency compared to Kimi K2. The result is a model built for long-horizon coding, agentic workflows, game development, and knowledge-intensive tasks, with benchmark results that put it in direct competition with the leading proprietary systems on the market today.