Together AI

A cloud platform for training, fine-tuning and serving open-source models at scale, with fast inference APIs across hundreds of checkpoints.

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Overview

Together AI runs open-source models at scale: hundreds of checkpoints served behind fast inference APIs, plus fine-tuning pipelines that turn a base model into a specialized one.

It grew out of open research and remains the most credible place to deploy open weights when you want performance close to self-hosting without operating GPUs yourself.

Pros / Cons

Pros

Huge catalog of open models served fast
Fine-tuning into custom endpoints
Dedicated-capacity options
Credible open-source pedigree

Cons

No proprietary frontier models
Costs need monitoring at scale
Enterprise compliance still maturing

Who it's for

Serving open models in production

Fine-tuning a domain-specific model

Benchmarking open-weight performance

Bottom line

Together AI is the de-facto home for serious open-weight deployment — research credibility plus production plumbing.

Key Features

Hundreds of open models served

Fine-tuning pipelines

Fast dedicated inference

Open research roots

Compare Together AI with alternatives

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Frequently asked questions

What is Together AI?

Together AI is a AI Platforms tool developed by Together AI. The company was founded in 2022 and is headquartered in San Francisco, USA. A cloud platform for training, fine-tuning and serving open-source models at scale, with fast inference APIs across hundreds of checkpoints.