Anthropic has announced Claude Opus four point five, its new flagship artificial intelligence model. It is designed to improve software development, reasoning and complex multi step work. The model is now available through the Claude apps, the application programming interface and select cloud platforms. It will compete with other leading models, including GPT five point one and Gemini three. Anthropic has also introduced the Claude Code desktop app for Windows, macOS and Windows Arm sixty four.
What is new in Claude Opus four point five
Anthropic says Opus four point five shows its largest improvements in software engineering tasks. These include debugging and working with multi system codebases. Internal testing shared by the company says the model can manage more ambiguity and technical trade offs. It can also complete tasks that earlier models found difficult. Beyond programming, the model is designed to handle document heavy tasks more effectively. These tasks include reviewing slides, spreadsheets and long research work.
The company says Opus four point five improves in several key areas. These include vision, mathematics and multi step reasoning. Anthropic shared test examples where the model produced workable solutions that outperformed standard expectations. One example included solving an airline itinerary issue by identifying an alternative procedural path.
Anthropic also says the model offers stronger protection against prompt injection attacks. These attacks attempt to make artificial intelligence systems ignore their instructions. The company describes Opus four point five as its most robustly aligned model. It includes upgrades that aim to detect and avoid harmful or deceptive inputs.
Updates across Anthropic products
The launch of Opus four point five comes with updates to Anthropic’s wider product ecosystem. Claude Code now includes more structured planning tools and is available in the desktop app. This allows users to run several coding or research sessions at the same time.
For general users, the Claude apps can now support longer conversations by automatically summarising earlier context. Claude for Chrome is being expanded to more subscribers. The company has also widened beta access to Claude for Excel for Max, Team and Enterprise customers.
Anthropic has adjusted usage limits so users with access to Opus four point five can run it at levels similar to the earlier Sonnet tier.
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