In 2026, Large Language Models (LLMs) have become a core part of business operations, with companies using them to automate work, improve customer service, and support decision-making. The article compares top models for B2B use, including GPT-5, Claude, Gemini, Llama, Mistral, Cohere, and Qwen, noting that the market includes offerings from OpenAI, Anthropic, Google, Meta, Mistral, Cohere, Alibaba, and others. High-impact use cases include customer support, where AI assistants reduce response times; sales teams using LLMs to summarise meetings and draft follow-ups; the legal sector reviewing contracts and identifying risks; and marketing departments creating content and optimising SEO strategies.