All Models

Claude Sonnet 4.5

anthropic/claude-sonnet-4.5

Claude Sonnet 4.5 is the newest model in the Sonnet series, offering improvements and updates over Sonnet 4.

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


const result = streamText({
  model: 'anthropic/claude-sonnet-4.5',
  prompt: 'Why is the sky blue?'
})