AT&T uses Microsoft Foundry for telecom AI scaling

AT&T has announced that it used Microsoft Foundry Managed Compute to build and scale its OTel2.0 telecom-focused AI models.

• AT&T used approximately 530 GPUs through Microsoft Foundry Managed Compute, including 430 AMD Instinct™ MI300X GPUs, to support OTel2.0 development across multiple GPU architectures.
• The company processed about 1T tokens for OTel2.0 and says using open-source models like Phi-4 for synthetic data generation saved tens of millions of dollars versus frontier models; Microsoft also said deployment could happen in days rather than weeks.
• AT&T deployed models including Phi-4, OSS-120B, and Gemma-4 for synthetic data generation, data preparation, reasoning workloads, and broader model development.