Single-agent AI systems peaked in 2025 — you gave one LLM a prompt, some tools, and a goal, and it did reasonably well on bounded tasks. In 2026, multi-agent systems have moved from research demos to production infrastructure. Gartner reports a 1,445% increase in multi-agent system inquiries from Q1 2024 to Q2 2025, while Salesforce's 2026 Connectivity Benchmark Report found organizations use an average of 12 agents, projected to grow 67% within two years. The AI Systems cluster covers the ...