Models are not commodities and are famously non fungible. Each model has its quirks and strengths, weaknesses and idiosyncrasies.

I know because I see how people went over the 4o model. I can see opus behaving clearly differently enough that I pick it for certain tasks.

Is this really for comparable models though? Will folks at scale continue to choose Anthropic frontier AI model if OpenAI releases a similar generation at a 90% discount with comparable capabilities? It feels like the fungibility assumes delineation by capability _and_ cost. No one is choosing sonnet over opus at similar price points.