Claude Opus 4 is our most intelligent model to date, pushing the frontier in coding, agentic search, and creative writing.
We’ve also made it possible to run Claude Code in the background, enabling developers to assign long-running coding tasks for Opus to handle independently.
Advanced coding
Claude Opus 4 is a leader on SWE-bench, completing days-long engineering tasks in coherent, context-aware solutions across thousands of steps.
With improved code taste and 32K output token support, it adapts to specific coding styles while delivering exceptional quality for extensive generation and refactoring projects.