Anthropic released Claude Opus 5.5 on September 22, its most capable model to date, arriving the same week competitors refreshed their own flagships. The near-simultaneous launches underline how quickly the top tier of AI models now moves, with each lab pushing capability and lowering the cost of the previous generation as it does.
For buyers, the practical effect of this pace is that last quarter's premium model often becomes this quarter's cheaper default.
What it means: there is little advantage in locking a business tightly to one AI model, because a better or cheaper option tends to appear within months. Choosing tools that let you switch the underlying model, and revisiting that choice a few times a year, captures the improvements without a rebuild each time.