More than 50,000 monthly active users now use ChatGPT and API tooling inside Deutsche Telekom, according to OpenAI's own customer case study on the telecom operator's AI programme.

The same case study records a 546% increase in AI tool usage since the start of 2026.

It describes the company as a telecom group with more than 300 million customers across Europe and the United States and more than 200,000 employees.

This article is based on OpenAI's own customer case study, so the adoption figures, workflow examples and executive comments remain source-owned.

The business outcome and performance claims are not independently verified in the public record.

50,000 Monthly Users Anchor The Case Study

The case study says the first phase gave employees access to ChatGPT Enterprise and encouraged experimentation across internal teams.

It says adoption then created demand for broader access and new capabilities.

Customer care was an early workflow area named in the case study.

Jonathan Abrahamson, Deutsche Telekom's chief product and digital officer, told OpenAI that AI-powered support remains in an early stage.

He said systems with more context could reduce handoffs and wait times in some service scenarios.

The programme also covers live translation, in-call assistants and post-call summaries.

Those functions are described as communications features inside customer interactions rather than a separate consumer application.

Voice And Network Workflows Carry The Next Phase

Voice communications form a separate part of the plan.

Abrahamson said the operator wants to bring intelligence into the voice network, and the case study lists real-time translation, intelligent call assistance and automated summarisation as areas under exploration.

Network operations are included as another workstream.

The case study says the telecom group uses AI with several partners to optimise mobile network performance in real time, including resource adjustments during commuter periods and major sporting events.

The public account keeps those network claims at programme level rather than naming the partner systems, mobile markets or service-level results behind the adjustments.

Public Record Still Stops At Programme Evidence

The source identifies adoption figures, internal workflow areas, voice features, network-operation examples and one named executive.

It also names OpenAI in customer-interaction work while saying other partners are involved in network optimisation.

The public record still lacks customer-satisfaction scores, cost savings, deployment budgets, vendor contract terms, model-selection rules, independent performance audits and a timetable for broad availability of the voice features.