Six Ways AI Agents Communicate in 2026. I Benchmarked All of Them. (opens in new tab)

Every few weeks someone asks me how their agents should talk to each other. The answer I give depends on what they're actually trying to do, and I've noticed most people pick a method based on what they already know rather than what fits the problem. So I sat down and actually tested all six approaches I've seen in production. Same test each time: Agent A sends a request, Agent B processes it and responds, I measure round-trip time and what breaks under real network conditions. Both agents ru...