Together AI

About Together AI

Together AI is a cloud platform for running, fine-tuning, and training open and open-weight AI models at scale. It provides fast, cost-efficient inference APIs for a large catalog of popular open models — covering chat, code, embeddings, image generation, and more — so developers can build on open models with the convenience of a managed endpoint. For teams that need customization, Together offers fine-tuning to adapt models to their data, and dedicated GPU clusters for training or high-throughput, low-latency serving. Its inference stack is optimized for performance, aiming to deliver competitive speed and price compared with running models yourself. Because it focuses on open models, Together appeals to organizations that want flexibility, transparency, and the ability to avoid lock-in to a single proprietary provider, while still getting reliable infrastructure. The platform also supports building agentic and RAG applications by combining model APIs with tools and retrieval. Researchers and startups use Together to experiment cheaply and then scale the same workloads to production. By packaging GPU infrastructure, optimized serving, and a broad open-model library into one platform, Together AI lowers the barrier to building with open-source AI.

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