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Claude Opus 4.1

Claude Opus 4.1 improves on Claude Opus 4 with targeted gains in agentic task execution, real-world coding, and multi-step reasoning, available on Vercel AI Gateway via anthropic, bedrock, vertexAnthropic with automatic retries and failover.

File InputReasoningTool UseVision (Image)Explicit Caching
index.ts
import { streamText } from 'ai'


const result = streamText({
  model: 'anthropic/claude-opus-4.1',
  prompt: 'Why is the sky blue?'
})
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Frequently Asked Questions

  • What specific improvements does Opus 4.1 make over Opus 4?

    Opus 4.1 improves agentic task execution, real-world coding, and reasoning over the Opus 4 baseline. It refines multi-step workflows and complex code generation while maintaining the same API interface.

  • How do I switch from Claude Opus 4 to Opus 4.1 in my existing code?

    Update the model string to anthropic/claude-opus-4.1 in your AI SDK v5 integration. No other code changes are required for the common case.

  • Which providers back Opus 4.1 on AI Gateway?

    AI Gateway routes Opus 4.1 through anthropic, bedrock, vertexAnthropic, with automatic failover between providers.

  • Is Opus 4.1 a significantly different model from Opus 4, or an incremental update?

    It's a targeted advance on the Opus 4 baseline, not a new architecture. Expect refinements in agentic task execution, coding, and reasoning rather than a fundamentally different model.

  • Does Opus 4.1 support extended thinking with tool use?

    Opus 4.1 is part of the Claude 4 generation, which introduced extended thinking with tool use. Check the API documentation for the specific capabilities available on the 4.1 checkpoint.

  • What latency should I expect from Opus 4.1 through AI Gateway?

    AI Gateway surfaces live performance metrics on this page, including throughput and time-to-first-token data that reflect real-time traffic conditions for this model.

  • When was Opus 4.1 made available on AI Gateway?

    May 22, 2025, the same day Anthropic released the model.