Together AI
By Together AI
Together AI is a cloud platform that provides API access to open-source large language models for inference and fine-tuning, along with GPU cloud infrastructure for training AI models at scale.
Definition
Together AI is a cloud platform that provides API access to open-source large language models for inference and fine-tuning, along with GPU cloud infrastructure for training AI models at scale.
Overview
Together AI focuses on making open-source models — such as Llama, Mixtral, and other community-released LLMs — as easy to use as proprietary APIs like OpenAI's. Developers call hosted models through a standard API for chat, completion, embeddings, and image generation, without needing to provision or manage GPU servers themselves. Beyond hosted inference, Together AI offers fine-tuning services so teams can customize open-source models on their own data, and dedicated GPU cloud infrastructure for larger training and inference workloads that need more control than a shared API endpoint. This combination of managed inference plus raw compute access positions it between fully managed model APIs and infrastructure-only providers like RunPod. Because it specializes in optimizing inference speed and cost for open large language models, Together AI is often compared with other open-model inference platforms such as Groq and Fireworks AI, with competition centered on latency, throughput, pricing, and the breadth of supported models.
Key Features
- Hosted API access to a wide range of open-source large language models
- Fine-tuning services for customizing open models on proprietary data
- Dedicated GPU cloud instances for training and large-scale inference
- Optimized inference infrastructure for lower latency and cost
- Support for embeddings, chat, and image-generation model endpoints
- Compatibility with common API formats used by other LLM providers
- Usage-based pricing without requiring long-term infrastructure commitments