08/17/2026
(Mixture of Experts: Why a Collection of Agents Beats a Single One)
Let me tell you why a single agent will fail on a complicated task: what you need is a collection of agents. Even with the same model, when you tell one agent it generates text and another that it generates visuals, they behave differently, because you have given them an identity. Without that identity, the model does not reliably know how to generate the image or video properly, but tell it "this is your job" and it suddenly does better. And there is a technical reason for it.
These models may have a trillion parameters, but they do not use all of them on every query. Under the hood they are mixture-of-experts models, so only part of the network is active at a time. You can think of a model not as one model, but as a collection of around 10 models trained together, with a router that decides which experts, maybe 2 or 3 of the 10, will answer your request. So "generate an image" routes to a different collection of experts than code does.
Giving each agent a distinct identity, one to write code and another to test it, works with that routing rather than against it. If you have used a single agent or a collection of agents, I would love to hear how you used it and what effect it had on your final output. Let me know in the comments.