Additional Opus 5.5 usage data after 1 week: - best Opus launch by far thru 6 days - a third of users who’ve tried it have made it their top model by usage already - check back in another week to see if the early switching from other leading models holds

OpenRouter@OpenRouterSep 28

Checking in on Opus 5.5 ~1 week after launch. It's the #1 model in share of spend and share of tokens among Anthropic models on OpenRouter Switching from Opus 5 has been particularly rapid