Claude Opus 4.5

Claude Opus 4.5 by Anthropic excels in the Coding category, where it ranks #9 with a composite score of 70/100. Claude Opus 4.5 is Anthropic’s frontier reasoning model optimized for complex software engineering, agentic workflows, and long-horizon computer use. It offers strong multimodal capabilities, competitive performance across real-world coding and reasoning benchmarks, and improved robustness to prompt injection. The model is designed to operate efficiently across varied effort levels, enabling developers to trade off speed, depth, and token usage depending on task requirements. It comes with a new parameter to control token efficiency, which can be accessed using the OpenRouter Verbosity parameter with low, medium, or high. Opus 4.5 supports advanced tool use, extended context management, and coordinated multi-agent setups, making it well-suited for autonomous research, debugging, multi-step planning, and spreadsheet/browser manipulation. It delivers substantial gains in structured reasoning, execution reliability, and alignment compared to prior Opus generations, while reducing token overhead and improving performance on long-running tasks. It is particularly strong in areas highlighted by its top benchmark performance and adoption metrics, making it suitable for both individual developers and enterprise teams looking for a reliable coding solution.

Claude Opus 4.5 is priced at $5.00 per million input tokens and $25.00 per million output tokens (USD). Contact the provider for volume discounts and enterprise pricing. Pricing is competitive within the coding category and reflects the model's quality-to-cost ratio.

In the Coding category, Claude Opus 4.5 holds rank #9 out of 6 models tracked. Its quality rank is #9 and adoption rank is #9. You can use our comparison tool at /compare to see detailed side-by-side metrics with specific alternatives. Key differentiators include its composite scoring across benchmarks, community sentiment, and real-world adoption rates.

Claude Opus 4.5 has been evaluated across 6 different signals. Its strongest areas include Capabilities (86/100), Context Window (84/100), Output Capacity (80/100). These scores are derived from industry-standard benchmarks, community ratings, and real-world performance metrics. The composite score of 70/100 reflects a weighted combination of all tracked signals.

Claude Opus 4.5 is a paid model, though some providers may offer trial credits or limited free tiers for evaluation. Check Anthropic's website for current free tier availability and promotional offers.