The investment was announced by Liz Kendall, Secretary of State for Science, Innovation and Technology.

Artificial intelligence has scaled on a single bet: that more chips, more data, and larger models would keep delivering. That approach is reaching its limits, just as the most important problems - in healthcare, defence, and enterprise - are proving too complex and too heterogeneous for any one model on any one chip to solve.

Callosum is building the infrastructure for what comes next. We call it Heterogeneous Intelligence: a paradigm where different models run across diverse chip architectures, orchestrated as a unified system. The result is a step change on the Pareto frontier of cost, latency, and quality. This is the kind of foundational technology Sov AI is designed to back: building the future of AI, not just adopting it. As the Department for Science, Innovation and Technology team put it, they "are proud to be backing Danyal, Jascha, and the team as they build one of the defining layers of next-generation AI systems."

The fund is also a statement about where this future gets built. Callosum is a London-based company, built by a team with rare cross-stack expertise from Cambridge, Oxford, MIT, Imperial, and ETH, and from DeepMind, Microsoft, and Intel. We are now backed by $10.25M in funding led by Plural, with support from ARIA (Advanced Research + Invention Agency) and the Sov AI Fund.

Advancing AI capability is not just a technological challenge but a national one. It requires long-term strategy, new institutions, and the willingness to back fundamentally new approaches. The next paradigm of computing is heterogeneity - and it will be built by those willing to rethink the system itself. We are building it.

Read the Department for Science, Innovation and Technology press release here.