Nebius acquires AI model optimization startup Eigen AI for $643M
$643M. That's what Nebius just paid for model optimization—a signal that inference efficiency is the new infrastructure battleground.

Why it matters
Nebius's acquisition of Eigen AI signals a strategic consolidation in the AI infrastructure stack, where compute providers are now bundling software optimization to compete directly with cloud giants and improve unit economics on GPU clusters.
The key facts
6 to knowNebius acquires Eigen AI for $643M
Deal financed with cash and stock
Expected close in weeks
Nebius operates AI data centers with GPU cluster access
Eigen AI specializes in model optimization software
Strategic move to vertically integrate inference efficiency into infrastructure offering
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Publisher excerpt: Nebius Group NV, a Dutch operator of artificial intelligence data centers, today announced plans to buy software maker Eigen AI Inc. for $643 million. The company will finance the acquisition with cash and stock. It expects to close the deal in a few weeks. Nebius provides access to graphics card…