Dunamu & Partners, an investment-focused unit of Dunamu, said on Monday it invested $5 million in a funding round by British AI inference optimisation company Callosum.

The round totalled $100 million and was led by European venture capital firm Atomico. Participants included Plural, DCVC and the UK government’s UK Sovereign AI fund, which selected Callosum as its first equity investment target, in addition to Dunamu & Partners.

Callosum is a startup founded in 2024 by Danyal Akarca (다냘 아카르카) and Jascha Achterberg (야샤 아흐터베르크), both former Cambridge University neuroscientists.

AI inference is typically run by operating a large model on a single type of chip. Callosum, by contrast, breaks work into smaller units and allocates them to different models and chips based on cost, power and speed conditions. In AI agent tasks in the finance sector, processing speed was 4 times faster than the existing single-model approach on GPU infrastructure, computing costs fell 70 percent and task success rates improved 10 percent.

Callosum is working with global semiconductor and AI infrastructure companies including Cerebras Systems, Rebellions, Axelera AI, Tendrils and Supermicro.

Lee Kang-jun (이강준), chief executive of Dunamu & Partners, said he expects multiple winners to emerge in both the semiconductor layer and the AI foundation model layer. He said the firm judged that an orchestration layer that finds the most effective and cost-efficient combinations for specific tasks will become a crucial area for value creation as AI advances. He said this is a system-level issue rather than simple software, and that the founders’ and team’s strong research track record and early commercialisation results are drawing attention from service providers, semiconductor firms and hyperscalers worldwide.