The article discusses the pros and cons of building a large language model (LLM) from scratch or tuning an existing one for use in telco AI solutions. It highlights the benefits of full control and customization, data privacy, and optimized performance for building an LLM, while also acknowledging the potential challenges of cost, development time, and scalability. On the other hand, tuning an existing LLM offers advantages such as faster time-to-market, cost effectiveness, and access to pre-built capabilities, but may also have limitations in customization and data privacy concerns. The article also mentions the Global Telco AI Alliance, a joint venture between several telecom companies, which aims to develop LLMs tailored to the needs of the industry.