Claude Opus 4

Claude Opus 4 is positioned as the best coding model in the world, scoring 72.5% on SWE-bench and 43.2% on Terminal-bench. It sustains focus for several hours on demanding projects spanning thousands of steps, and excels at creating and maintaining memory files that keep it aware of long-term task context. Opus 4 demonstrates a 65% reduction in taking shortcuts compared to prior versions, handling multi-step problem solving that challenges competing models. It supports extended thinking with integrated tool use and parallel tool execution, enabling sophisticated agentic workflows and demanding reasoning tasks. With vision capabilities and a 200K token context window, Opus 4 is built for knowledge workers and engineers tackling high-stakes projects that require sustained reasoning and reliability across long-running work.