Claude Opus 4.5 became available on Vercel AI Gateway on November 24, 2024. The model adds a new effort parameter that affects all token types and governs how much token usage the model applies per request. It defaults to high and operates independently of the thinking budget, giving you a separate lever for token efficiency without adjusting extended thinking configuration.
Difficult coding tasks and agentic workflows are core strengths, especially those combining computer use and tool use. The model handles context from external memory files effectively. Frontend coding and design for real-world web applications are established strengths of this checkpoint.
To use the model, set anthropic/claude-opus-4.5 and configure effort through providerOptions in the AI SDK. The effort setting is independent of the thinking budget. Set both separately to manage the cost-quality tradeoff for different request types in the same application.
Anthropic designed Opus 4.5 for the demanding end of the agent capability spectrum: workflows involving computer use, external tool calls, memory file management, and frontend development where design quality and code correctness both matter.