On November 24, 2025 (local time), Anthropic made an official announcement, rolling out the latest iteration of its premier AI model, Claude Opus 4.5. This launch represents the culmination of the Claude 4.5 series, building on the previous introductions of Sonnet 4.5 and Haiku 4.5.

Opus 4.5 stands out as a global leader in coding, intelligent agent operations, and computer application performance. It demonstrates remarkable superiority over other models in handling everyday tasks, including in-depth research, slideshow management, and spreadsheet operations. In the SWE-bench test, which evaluates programming prowess, Opus 4.5 outperforms both Google's Gemini 3 Pro and OpenAI's GPT-5.1. Moreover, it has even achieved higher scores than all human participants in closed-book exams, a testament to its advanced capabilities.

Microsoft has also stepped into the spotlight by announcing plans to integrate this cutting-edge model into several of its key products. These include Microsoft Foundry, the premium versions of GitHub Copilot, and Microsoft Copilot Studio, signaling a significant advancement in AI-powered productivity tools.