Do they? With Fable/Opus duo they have a better product and their customers are paying for quality. They want to be the premium LLM provider letting others compete for the commoditized part of the market.
Even more so has been what appears to be a miss with Opus 5 in Claude Code.
Opus 5 is amazing if you use it as an autonomous agent as opposed to a pair programmer. It's like Fable at a much lower price.