Subquadratic, a Miami-based AI company developing a novel generative artificial intelligence model, has raised $29 million in Seed funding. 

Investors 

The funding round included investors such as Javier Villamizar, Justin Mateen of JAM Fund, as well as early investors in Anthropic, OpenAI, Stripe, and Brex. 

Subquadratic Use of Funds 

The company will use the funding to expand development of its SubQ long-context AI model, launch its developer API and coding tools, and scale enterprise AI applications powered by its sparse-attention transformer architecture. 

About Subquadratic 

Founded by Justin Dangel and Alexander Whedon, Subquadratic is an AI infrastructure company developing a new generation of large language models designed to overcome the scaling limitations of traditional transformer architectures. Its flagship model, SubQ, leverages a proprietary sparse-attention architecture that can handle context windows of up to 12 million tokens. In addition to its API platform, Subquadratic is also developing SubQ Code, a coding agent built for repository-scale AI development tasks. Headquartered in Miami, Florida, Subquadratic's mission is to develop AI that is powerful, trustworthy, and accessible.

Funding Details 

Company: Subquadratic, Inc. 

Raised: $29.0M 

Round: Seed 

Funding Date: May 2026 

Investors: Javier Villamizar, Justin Mateen (JAM Fund), and early investors in Anthropic, OpenAI, Stripe, and Brex 

Company Website: https://subq.ai/  

Software Category: AI Infrastructure / Large Language Models 

Source: https://siliconangle.com/2026/05/05/subquadratic-launches-29m-bring-12m-token-context-windows-ai/