"Anthropic has announced Claude Opus 4.5, its most advanced model to date and the new industry leader for AI code generation. The leading AI lab has claimed the new model is a strong contender for all agentic workflows, including code generation and autonomous computer use. Opus 4.5 scored 80.9% in SWE-Bench Verified, cementing it as the new state of the art model for code generation."
"Via the Claude API, developers can use a new 'effort' parameter to determine how many tokens they want the model to use for a given task. This affects how long the output will take and how expensive it will be. In tests, Opus 4.5 set to 'medium' was able to match Claude Sonnet 4.5 scores on SWE-bench Verified while using 76% fewer output tokens."
"Aside from its coding capabilities, Anthropic underlined the overall improvement Opus 4.5 brings to various enterprise tasks. For example, the model is capable of complex information retrieval, agentic tool use, and deep analysis, as well as Excel automation. Across agentic tool use benchmarks, Opus 4.5 was found to consistently outclass rival models."
Claude Opus 4.5 is Anthropic's most advanced model, positioned as the industry leader for AI code generation and agentic workflows. Opus 4.5 achieved 80.9% on SWE-Bench Verified, outperforming GPT-5.1 Codex Max (77.9%) and Gemini 3 Pro (76.2%). The model provides developers a configurable 'effort' parameter via the Claude API to control output token usage, latency, and cost. At 'medium' effort Opus 4.5 matched Sonnet 4.5's SWE-Bench scores while using 76% fewer output tokens. Opus 4.5 also demonstrates improvements in information retrieval, agentic tool use, deep analysis, Excel automation, and consistently outperforms rivals on agentic tool benchmarks.
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