You can now access Anthropic's latest model, Claude Opus 4.5, via Vercel's AI Gateway with no other provider accounts required.

Claude Opus 4.5 is suited for demanding reasoning tasks and complex problem solving. This model has improvements in general intelligence and vision compared to previous iterations. It excels at difficult coding tasks and agentic workflows, especially those with computer use and tool use, and can effectively handle context usage and external memory files. Frontend coding and design are established strengths, particularly for developing real-world web applications.

To use Claude Opus 4.5, set model to anthropic/claude-opus-4.5 in the AI SDK. There is a new effort parameter for this model. This parameter affects all types of tokens and controls the level of token usage when responding to a request. By default, effort is set to high and is independent of the thinking budget. To use it in AI Gateway with the AI SDK, set effort for the provider in providerOptions, as seen below in the example.

import { streamText } from 'ai';
const result = streamText({
  model: 'anthropic/claude-opus-4.5',
  prompt:
  `Design and build a production-ready SaaS web app with
   real-time analytics, feature flags, dashboards, alerts, RBAC,
   integrations, accessibility, and performance optimization.`,
  providerOptions: {
    anthropic: {
      effort: 'high',
  },
});

AI Gateway provides a unified API for calling models, tracking usage and cost, and configuring retries, failover, and performance optimizations for higher-than-provider uptime. It includes built-in observability, Bring Your Own Key support, and intelligent provider routing with automatic retries.

Read the docs, view the AI Gateway model leaderboard, or use Claude Opus 4.5 directly in our model playground.