Claude Sonnet 5.5 is here. This prompt stops it from wasting your usage

When you purchase through links in our articles, we may earn a small commission. Claude Sonnet 5.5 is here. This prompt, straight from Anthropic's own docs, helps curb that bad habit. The latest version of Claude Sonnet--Anthropic's workhorse AI model--has just landed, and with it comes a prompt that could help keep any AI agent from leaping into action before making a plan first. Available now on the web, the Claude desktop app, and other Claude platforms, Claude Sonnet 5.5 is Anthropic's middle-of-the-road model, It's a step below Opus 5.5 but apparently just as capable as Fable 5.1 (Anthropic's pricey frontier flagship) and a step above Haiku 5 (a fast but basic Claude model that's due for a 5.5 upgrade).