About

Together AI is a cloud platform that provides fast and affordable access to leading open-source AI models through an API, along with infrastructure for fine-tuning and training custom models. Founded in 2022 by a team of AI researchers from Stanford, the company operates a high-performance GPU cluster optimized for inference and training of open-source models. Together AI offers API access to a wide selection of popular open-source language models including LLaMA, Mistral, Mixtral, DeepSeek, Qwen, and many others, as well as image generation, code, and embedding models. The platform is known for its competitive pricing and fast inference speeds, achieved through custom inference engine optimizations and efficient GPU utilization. Together AI provides several key services. Its Inference API enables developers to run open-source models with OpenAI-compatible endpoints, making it straightforward to integrate into existing applications. The Fine-tuning API allows users to customize models on their own data with support for full fine-tuning, LoRA, and QLoRA methods, all managed through a simple API or web interface. Together also offers dedicated GPU clusters for organizations that need guaranteed capacity and custom deployments. The platform supports function calling, JSON mode, streaming, and chat completion formats that are compatible with the OpenAI API specification, simplifying migration for developers already using OpenAI. Together AI has contributed to several open-source projects and research efforts in efficient AI training and inference. Pricing follows a pay-per-token model that varies by model size and type, with rates generally lower than many competing inference providers. The platform is used by startups, enterprises, and researchers who prefer open-source models with the flexibility to fine-tune and customize.

AI GPU Cloud

Together AI operates high-performance GPU clusters optimized for AI inference and training. It offers dedicated GPU capacity for organizations needing guaranteed resources, as well as serverless inference that efficiently shares GPU resources across users for cost-effective model serving.

AI Model Hosting

Together AI hosts and serves hundreds of open-source AI models on optimized infrastructure. Developers can deploy models through the shared inference API for cost-effective serving or provision dedicated endpoints for guaranteed capacity, with the platform handling all infrastructure management.

AI Training Platforms

Together AI provides managed fine-tuning and training infrastructure for customizing open-source models. Users can fine-tune models using full fine-tuning, LoRA, or QLoRA methods through a simple API, with Together handling GPU provisioning, distributed training, and optimization.

LLM APIs

Together AI provides API access to a wide catalog of open-source language models with OpenAI-compatible endpoints, competitive pricing, and fast inference speeds. Developers can access models like LLaMA, Mistral, and DeepSeek through a standardized API with support for streaming, function calling, and JSON mode.

Open Source LLMs

Together AI specializes in hosting and serving open-source language models, providing fast and affordable API access to models from Meta, Mistral, DeepSeek, and other open-source providers. Its platform makes it easy to run, compare, and integrate open-source LLMs without managing GPU infrastructure.

Tool Details Paid

Pricing Pay-per-token API pricing (varies by model)
Platform API
Headquarters San Francisco, CA
Founded 2022
API Available Yes
Enterprise Plan Yes
4.5 2 reviews

AI Reviews

🤖
4.5 /5

Together AI has established itself as a leading platform for accessing open-source LLMs through a fast, developer-friendly API. Their inference engine delivers impressive speed, often outperforming competitors on throughput for popular models like Llama 3, Mixtral, and Qwen. The pay-per-token pricing is competitive and transparent, making it accessible for both prototyping and production workloads.

The platform excels at model hosting with an extensive catalog of open-source models available out of the box, plus support for custom fine-tuning and dedicated deployments. Their fine-tuning pipeline is straightforward, though advanced training customization options are somewhat limited compared to dedicated MLOps platforms. GPU cloud offerings are solid but less flexible than pure infrastructure providers like Lambda or CoreWeave.

Strengths include exceptional inference speed, OpenAI-compatible API endpoints for easy migration, and strong open-source model support. Limitations include less granular control over infrastructure, and costs can escalate at very high volumes compared to self-hosting. Overall, Together AI is an excellent choice for teams wanting fast, reliable access to the best open-source models without managing infrastructure.

Category Ratings

AI GPU Cloud
4.3
AI Model Hosting
4.6
AI Training Platforms
4.2
LLM APIs
4.7
Open Source LLMs
4.8
Feb 15, 2026
AI-Generated Review Generated via Anthropic API. This is an automated evaluation, not a consumer review. Learn more
🤖
4.5 /5

Together AI has established itself as a premier platform for accessing open-source LLMs through a unified API. Their inference speeds are consistently impressive, often outperforming competitors on popular models like Llama, Mixtral, and Qwen. The pay-per-token pricing is competitive and transparent, making it accessible for projects of varying scales.

The platform excels at model hosting with excellent uptime and low latency. Their fine-tuning capabilities are solid, though the training platform could benefit from more advanced customization options. GPU cloud access is available but feels secondary to their core API offering.

Strengths include an extensive model library, excellent documentation, and seamless API integration. The Together Embeddings and reranking models add significant value. Limitations include less flexibility for custom deployments compared to dedicated GPU providers, and enterprise features could be more robust.

For developers prioritizing fast, cost-effective access to open-source models, Together AI delivers exceptional value and remains a top choice in the inference API space.

Category Ratings

AI GPU Cloud
4.3
AI Model Hosting
4.6
AI Training Platforms
4.2
LLM APIs
4.7
Open Source LLMs
4.8
Feb 12, 2026
AI-Generated Review Generated via Anthropic API. This is an automated evaluation, not a consumer review. Learn more