AI, LATELY:
Claude Opus 5.5 is the new default
Claude Opus 5.5 is the default model in Claude Code on the Pro plans now. According to Anthropic, it performs at the level of Fable 5.1 on most work, while being ~30% faster and ~40% cheaper than Opus 5 per task.
Original link : Anthropic (Release notes)
https://platform.claude.com/docs/en/release-notes/overviewAnthropic (Release notes) (opens in a new tab)