How to use Claude Opus 4.5 with Cursor and Claude Code — a in-depth guide
This article explains Anthropic's newest Claude Opus 4.5 model, its features and performance, and how to use it with Cursor (an AI-powered IDE) and Claude Code (Anthropic's command-line coding tool).
Why it matters
Opus 4.5 is a significant upgrade for developers and teams looking to leverage a powerful, cost-efficient coding assistant in their workflows and tools.
Key Points
- 1Claude Opus 4.5 is Anthropic's newest flagship model focused on coding, agentic workflows, and advanced computer use
- 2It offers token efficiency, improved coding performance, and better agentic/tool use capabilities
- 3Benchmarks show Opus 4.5 outperforming previous models on coding and multi-step reasoning tasks
- 4The article provides a step-by-step guide on how to obtain and use Opus 4.5 through the CometAPI platform
Details
Claude Opus 4.5 is Anthropic's newest release in the Claude 4.5 line, positioned as a broadly capable, production-grade model for high-quality natural language and coding outputs. It introduces features like an 'effort' parameter to trade compute/thinking budget for latency/cost, improved code generation and debugging performance, and better agentic and tool-use capabilities. Benchmarks show Opus 4.5 outperforming previous models, with a focus on practical improvements rather than just synthetic score gains. The article explains how to access Opus 4.5 through the CometAPI platform, which provides a unified interface to many large language models and can offer pricing/access advantages.
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