Future-Proof Naming: A Magnum Opus Leaves Nowhere to Go

The obvious problem with naming your best model Opus is that you eventually have to build a better one. A magnum opus is supposed to be the work someone is remembered for. Anthropic’s original Claude hierarchy—Haiku, Sonnet, Opus—was memorable and reasonably intuitive. A haiku is short, a sonnet is more substantial, and an opus is a major work (in terms of impact, but that’s often correlated with…