The battle for AI supremacy has intensified once again with Anthropic’s release of Claude Opus 4.5, a model the company boldly claims is the “best in the world” for coding, and agents. Opus 4.5 arrives with impressive credentials, reportedly outperforming major competitors like GPT-5.1 and Gemini 3 Pro on key benchmarks. Anthropic is positioning this release as a fundamental shift toward agentic workflows. For developers and enterprise users, this promises a level of autonomy that could redefine how software is built and how data is managed.
The headline feature of Opus 4.5 is its sheer prowess in software development, underscored by a record-breaking score of 80.9% on the SWE-bench Verified test. This metric sees Opus 4.5 becoming the first model to cross the 80% threshold, edging out its closest rivals. Beyond synthetic benchmarks, Anthropic asserts that the model has outperformed human candidates on internal technical assessments designed to test judgment and problem-solving under pressure.
Accompanying the model is the expansion of “Claude Code,” a tool designed to bring this intelligence directly into the developer’s native environment: the terminal. By integrating deeply with command-line workflows and offering a new Visual Studio Code extension, Claude Code allows the AI to act as an autonomous agent that can plan, write, debug, and commit code independently. The system supports running multiple parallel sessions, meaning a developer could have the AI fixing a bug in one window while running a test suite in another.
One of the most innovative introductions with Opus 4.5 is the new “effort parameter,” which gives users direct control over how the model approaches a task. Users can toggle between Low, Medium, and High effort settings, effectively deciding whether they want a quick, cost-effective answer or a deep, reasoned analysis that might take longer and cost more.
Claude Opus 4.5 is available immediately across Anthropic’s API, web interface, and major cloud providers including AWS, Google Cloud, and Microsoft Azure. With pricing set at $5 per million input tokens and $25 per million output tokens, it offers a competitive option for high-end intelligence.
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