Sovereign AI infrastructure development took a significant step forward on April 10, 2026, when Rebellions, SK Telecom (SKT), and Arm announced a three-way collaboration to build AI inference infrastructure for sovereign AI and telecommunications-focused data centers.
The three companies plan to develop an AI server that combines the Arm AGI CPU, the first data center CPU designed by Arm, with Rebellions’ AI chips. The system will be validated inside SKT’s AI data center before any expansion into global markets.
What the Collaboration Covers
The Arm AGI CPU, built on Arm Neoverse CSS V3, will be paired with Rebellions’ RebelCard accelerator to form high-performance server infrastructure. Beyond hardware, the partners will co-develop a full software stack, including firmware, and deploy the solutions in SKT’s live data center environments. The goal is to verify performance and stability for sovereign AI models and telco-specific large-scale data processing workloads.
The partners also plan to evaluate running SKT’s proprietary foundation model, A.X K1, on these servers. Following technical validation, the companies intend to explore broader commercial deployment opportunities across global telecommunications companies and public sector organizations that require independent AI infrastructure.
Sovereign AI Infrastructure: The Market Opportunity
The alliance targets the growing demand in the AI inference market, with a particular focus on Asia. Rebellions said it intends to supply customized, stability-tested solutions to telecom operators and government bodies that need to own and control their AI systems rather than simply access third-party services.
Rebellions is backed by Aramco, Arm, Samsung, SK Hynix, SK Telecom, KT, Mirae Asset Group, and Kindred Ventures. The company is headquartered in South Korea with operations in the United States.
About the RebelCard Hardware
The Rebellions RebelCard is a module-type card built around the company’s Rebel 100 AI semiconductor, formerly known as Rebel-Quad. It integrates four NPU chiplets with fifth-generation High Bandwidth Memory (HBM3E). Rebellions said the card delivers performance comparable to current flagship GPUs while exceeding them in power efficiency, making it suited for large-scale AI data centers running ultra-large multimodal and Mixture of Experts (MoE) models.
Quotes from the Three Partners
“By providing our RebelCard, which offers strong performance and power efficiency, alongside our full-stack software, Rebellions has become a core pillar supporting next-generation AI data centers. We expect this one-team collaboration of experts to serve as a significant precedent in the industry for building AI-specialized infrastructure.”
Jinwook Oh, CTO, Rebellions
“By providing a full package that combines inference-optimized infrastructure with our proprietary foundation model, A.X K1, we will further strengthen our competitiveness in the AI data center market.”
Jaeshin Lee, Vice President and Head of AI Business Development, SK Telecom
“As AI infrastructure expands globally, CPUs play a critical role in coordinating workloads across accelerators, memory and networking. Arm AGI CPU, built on Arm Neoverse CSS V3, was designed to deliver the performance and efficiency required for large-scale AI deployments. Together with Rebellions and SK Telecom, we are enabling scalable infrastructure for sovereign AI and telecommunications markets.”
Eddie Ramirez, Vice President of Go-to-Market, Cloud AI Business Unit, Arm
The collaboration spans the full value chain, from infrastructure design through real-world deployment and validation. No timeline for commercial availability was specified in the announcement, though the partners said technical validation at SKT’s data center is the immediate next step before any broader commercial rollout.
