Claude Opus 5 Integrated into Cursor AI Code Editor
Cursor has integrated the new Claude Opus 5 model, which matches the performance of Claude Fable 5 on the CursorBench benchmark at half the cost. Additionally, this new model supports Zero Data Retention, a feature not available with Fable 5. This integration provides developers with a highly capable coding assistant at a significantly lower price point while ensuring strict data privacy. It allows enterprises with strict compliance requirements to leverage advanced AI capabilities without risking data exposure. On the CursorBench benchmark at default effort, Claude Opus 5 scored 66.7 compared to Fable 5's 66.5. The Zero Data Retention compatibility ensures that user prompts and code snippets are not stored or used for model training.
## BACKGROUND
Cursor is an AI-powered code editor designed for software development, utilizing its own benchmark, CursorBench, to evaluate AI agents on complex, multi-file coding tasks. Zero Data Retention (ZDR) is a privacy policy where AI providers guarantee that user data is immediately discarded after processing, which is crucial for enterprise security. Claude Fable 5 and Claude Opus 5 are advanced language models developed by Anthropic.