Together AI

Paid

together.ai

A specialized AI cloud platform that provides incredibly fast, low-cost API access to the world's best open-source language models.

About Together AI

Together AI is a leading infrastructure provider heavily focused on optimizing and accelerating open-source artificial intelligence. As the open-source community rapidly produces models that rival proprietary giants (like OpenAI), developers need a reliable, extremely fast way to access them without buying $30,000 server GPUs.

Together AI hosts over 100 of the most powerful open-source models—including Llama 3, Mixtral, and Qwen—and provides access to them via a unified, frictionless API. Their primary competitive advantage is speed and cost. By engineering highly customized routing and inference architectures at the hardware level, they frequently serve text generated by these models faster and cheaper than any other cloud provider.

Beyond simple inference, the platform offers robust fine-tuning infrastructure. An enterprise can upload a secure dataset of internal corporate documents, and Together AI will seamlessly fine-tune a massive Llama model on that exact data, hosting the resulting custom model on a private, dedicated API endpoint.

Key Features

Core capabilities and technical highlights of Together AI

Unified API providing frictionless, instant access to over 100 of the world's most powerful open-source generative AI models.

Industry-leading inference optimization architecture resulting in blistering generation speeds and significantly lower compute costs.

Seamless fine-tuning platform allowing developers to easily train massive models on custom datasets securely in the cloud.

Dedicated instance hosting providing enterprise customers with private, guaranteed GPU compute for massive production workloads.

Popular Use Cases

How teams, developers, and creators get value from Together AI

1Instantly switch a software application's backend from a slow, expensive proprietary API to the incredibly fast Mixtral open-source model.

2Fine-tune the Llama 3 language model on a massive dataset of legal documents to create a highly specialized, highly accurate internal AI lawyer.

3Build a real-time conversational voice agent that relies on the platform's ultra-low latency inference to respond to users instantly.

4Deploy a custom, fine-tuned model on dedicated GPU instances to ensure absolute data privacy and guaranteed uptime for an enterprise client.

Frequently Asked Questions

Common questions and answers regarding Together AI

Is Together AI free?

The platform offers a generous initial free credit balance for developers to test the API speed. Production usage operates on a highly competitive pay-as-you-go model.

Is the API compatible with OpenAI's code?

Yes, the API is intentionally designed to be OpenAI-compatible, meaning developers can switch their backend to Together AI by simply changing one line of code in their app.

Why not just run the models locally?

Running massive 70-billion parameter models requires incredibly expensive, specialized hardware (massive VRAM GPUs) which is often impractical for independent developers or small startups.

Are my API requests used to train their models?

No, Together AI explicitly states they do not use customer API data or fine-tuning datasets to train their foundational models.

Does it support image generation models?

Yes, while famous for large language models (LLMs), the platform also hosts incredibly fast inference endpoints for popular open-source image models like Stable Diffusion.