Anthropic has unveiled Claude Opus 4.5, a new flagship model positioned as the company’s most capable system to date. The launch marks a defining shift in the pricing and performance ecosystem, with the company reducing token costs and highlighting advances in reasoning, software engineering accuracy, and enterprise-grade automation.
Anthropic says the new model delivers improvements across both technical benchmarks and real-world testing. Internal materials reviewed by industry reporters show that Opus 4.5 surpassed the performance of every human candidate who previously attempted the company’s most difficult engineering assignment, when the model was allowed to generate multiple attempts and select its strongest solution. Without a time limit, the model’s best output matched the strongest human result on record through the company’s coding environment. While these tests do not reflect teamwork or long-term engineering judgment, the company views the results as an early indicator of how AI may reshape professional workflows.
Pricing is one of the most notable shifts. Opus 4.5 is listed at roughly five dollars per million input tokens and twenty-five dollars per million output tokens, a substantial decrease from the rates attached to earlier Opus models. Anthropic states that this reduction is meant to broaden access to advanced capabilities and push competitors to re-evaluate their own pricing structures.
In performance testing, Opus 4.5 achieved an 80.9 percent score on the SWE-bench Verified benchmark, which evaluates a model’s ability to resolve practical coding tasks. That score places it above recently released systems from other leading AI labs, including Anthropic’s own Sonnet 4.5 and models from Google and OpenAI. Developers involved in early testing also reported that the model shows stronger judgment in multi-step tasks. Several testers said Opus 4.5 is more capable of identifying the core issue in a complex request and structuring its response around what matters operationally.
A key focus of this generation is efficiency. According to Anthropic, Opus 4.5 can reach or exceed the performance of earlier Claude models while using far fewer tokens. Depending on the task, reductions in output volume reached as high as seventy-six percent. To give organisations more control over cost and latency, the company introduced an effort parameter that lets users determine how much computational work the model applies to each request.
Enterprise customers participating in early trials reported measurable gains. Statements from companies in software development, financial modelling, and task automation described improvements in accuracy, lower token consumption, and faster completion of complex assignments. Some organisations testing agent workflows said the system was able to refine its approach over multiple runs, improving its output without modifying its underlying parameters.
Anthropic launched several product updates alongside the model. Claude for Excel is now available to higher-tier plans and includes support for charts, pivot tables, and file uploads. The Chrome extension has been expanded, and the company introduced an infinite chat feature that automatically compresses earlier conversation history, removing traditional context window limitations. Developers also gained access to new programmatic tools, including parallel agent sessions and direct function calling.
The release comes during an intense period of competition across the AI sector, with major firms accelerating release cycles and investing heavily in infrastructure. For organisations, the arrival of lower-cost, higher-accuracy systems could further accelerate the adoption of AI for coding, analysis, and automated operations, though careful validation remains essential before deploying such capabilities in critical environments.