What is Together AI used for?

Together AI is a cloud platform for running, fine-tuning and training open-source and custom AI models, with serverless and dedicated inference plus GPU clusters. It is a good fit for serving open-source LLMs through an API, fine-tuning a model on company data and renting GPU clusters for model training.

How much does Together AI cost?

Together AI is a paid product with no free plan. Usage-based. Serverless models bill per million tokens (for example Qwen3.5 9B at $0.17 input and $0.25 output), dedicated H100 GPUs cost $5.49 per GPU-hour and on-demand cluster H100s $3.99.

Is Together AI open source?

No. Together AI is proprietary (closed-source) software and can't be self-hosted. Open-source alternatives to Together AI include Unsloth, vLLM and LocalAI.

What are some alternatives to Together AI?

Together AI competes with Fireworks AI, DeepInfra and Baseten. For open-source options, see Enlisted's ranked list of open-source Together AI alternatives.

Together AI: features, pricing and alternatives

About Together AI

Together AI is a cloud platform that covers the main stages of working with open-source and custom AI models. Developers can call models through APIs, tune them on their own data, or rent GPU capacity to train, all from one vendor that markets itself as an AI native cloud.

Its inference options include serverless APIs, batch inference, provisioned throughput with service levels, dedicated model endpoints on custom hardware and dedicated container inference for custom models. Model shaping covers fine-tuning, custom post-training and evaluations. On the compute side it offers GPU clusters and custom infrastructure, with managed storage for model weights and data and a sandbox for development environments.

Together AI is a proprietary commercial service with a published pricing page. It also maintains a model library of open-source chat, image, code, vision and video models, a research program that has produced projects such as FlashAttention, and cookbooks and demo apps for developers.

Key features

Serverless and batch inference APIs
Dedicated model and container endpoints
Fine-tuning and custom post-training
Model evaluations
GPU clusters for training
Managed storage for weights and data

Good fit for

→Serving open-source LLMs through an API
→Fine-tuning a model on company data
→Renting GPU clusters for model training

Tags: ai-inference; fine-tuning; gpu-cloud; open-source-models; llm-api; model-training; serverless; mlops

Together AI: questions and answers

What is Together AI used for?: Together AI is a cloud platform for running, fine-tuning and training open-source and custom AI models, with serverless and dedicated inference plus GPU clusters. It is a good fit for serving open-source LLMs through an API, fine-tuning a model on company data and renting GPU clusters for model training.
How much does Together AI cost?: Together AI is a paid product with no free plan. Usage-based. Serverless models bill per million tokens (for example Qwen3.5 9B at $0.17 input and $0.25 output), dedicated H100 GPUs cost $5.49 per GPU-hour and on-demand cluster H100s $3.99.
Is Together AI open source?: No. Together AI is proprietary (closed-source) software and can't be self-hosted. Open-source alternatives to Together AI include Unsloth, vLLM and LocalAI.
What are some alternatives to Together AI?: Together AI competes with Fireworks AI, DeepInfra and Baseten. For open-source options, see Enlisted's ranked list of open-source Together AI alternatives.