Claude-4 Opus represents Anthropic's most advanced AI model, specifically engineered for complex reasoning, coding excellence, and sustained long-horizon task execution. Leading the industry with a 72.5% score on SWE-bench and 43.2% on Terminal-bench, it stands as the world's best coding model. The model excels at multi-step engineering tasks, capable of working autonomously for up to seven hours on complex projects while maintaining coherent, context-aware solutions across thousands of steps. With advanced reasoning capabilities, 32K output token support, and improved code taste, Claude-4 Opus adapts to specific coding styles while delivering exceptional quality for extensive generation and refactoring projects. Beyond coding, it demonstrates superior performance in agentic search, creative writing, and complex research synthesis, making it ideal for demanding enterprise applications where accuracy and capability matter more than speed or cost. The model features hybrid reasoning modes, allowing users to choose between near-instant responses and extended thinking for deeper analysis.