Code editor startup Anysphere has closed a $900 million funding round. Anysphere is now worth $9.9 billion, nearly four times what it was worth after its previous funding round in December. Anysphere offers a popular code editor called Cursor that uses artificial intelligence to automate programming tasks. An embedded chatbot allows developers to generate code, ask for technical explainers and perform related tasks. The software processes user requests using more than a half dozen large language models. Cursor is based on VS Code, one of the most popular open-source code editors on the market. As a result, developers can bring over keybindings from their existing VS Code environments. Keybindings are user-defined keyboard shortcuts that speed up tasks such as jumping to the start of a code file. Cursor also works with VS Code extensions. Using Cursor, developers can describe the task they wish to perform in natural language and have an AI model generate the corresponding terminal command. The code editor also functions as a kind of spell checker. It can automatically spot and correct mistyped characters, which removes the need for developers to interrupt their workflow in order to perform troubleshooting. Mistyped characters render the code file that contains them unusable, which makes them fairly easy to detect. Developers spot the issue as soon as they attempt to run the file. According to Anysphere, Cursor can also spot more subtle bugs that don’t render a code snippet unusable but lead to unexpected behavior or slow performance.