There has been a great deal of speculation about why Anthropic is keeping Mythos in restricted release. One of the least-discussed reasons is cost. Not the cost to Anthropic of serving the model, but the downstream effects that cost will have on the industry, and on the world. Mythos is now being served to a small group of about 50 major companies. For organizations like these, token budgets are effectively unlimited, and the opportunity cost of not using as much of the model as possible is…