It is entirely due to Opus 4.5 being an inflection point codingwise over previous LLMs. Most of the buzz there has been organic word of mouth due to how strong it is.
Opus 4.5 is expensive to put it mildly, which makes Claude Code more compelling. But even now, token providers like Openrouter have Opus 4.5 as one of its most popular models despite the price.
