Fabrizio Mazzei

Nov 1, 2026 · 7 min read

Is it worth building more sophisticated agents if they cost three times as much and solve the same tasks?

More elaborate harnesses don't raise the pass rate, but they triple the bill: the cost lies entirely in the prefix resent at every step. Meanwhile Meta asks the market for 35 billion, Google compresses its releases and Mistral opens the weights of a trillion-parameter model.