You can now access Anthropic's latest model, Claude Haiku 4.5 using Vercel's AI Gateway with no other provider accounts required. Haiku 4.5 matches Sonnet 4's performance on coding, computer use, and agent tasks at substantially lower cost and faster speeds.

AI Gateway lets you call the model with a consistent unified API and just a single string update, track usage and cost, and configure performance optimizations, retries, and failover for higher than provider-average uptime.

To use it with the AI SDK v5, set the model to anthropic/claude-haiku-4.5:

import { streamText } from 'ai'
const result = streamText({
  model: "anthropic/claude-haiku-4.5",
  prompt: "Write me a haiku about Claude Haiku 4.5." 
})

Includes built-in observability, Bring Your Own Key support, and intelligent provider routing with automatic retries.

To deliver high performance and reliability to Claude Haiku 4.5, AI Gateway leverages multiple model providers under the hood, including Anthropic, Bedrock and Vertex AI.

Learn more about AI Gateway, view the AI Gateway model leaderboard or try it in our model playground.