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Claude Sonnet 4

Claude Sonnet 4 supports a context window of 1M tokens on Vercel AI Gateway, enabling full codebase analysis of 75,000+ lines or large document sets, while scoring 72.7% on SWE-bench Verified with hybrid extended thinking and enhanced steerability.

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


const result = streamText({
  model: 'anthropic/claude-sonnet-4',
  prompt: 'Why is the sky blue?'
})
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