Next.js ai Package Error: 'OpenAIStream' and 'StreamingTextResponse' Not Exported

The error indicates that the ai package version 4.0.22 no longer exports StreamingTextResponse. In earlier versions or examples the code used both legacy functions like OpenAIStream and StreamingTextResponse, but in version 4.0.22 these exports have been removed (or replaced) as part of a migration to the new AI SDK patterns.

Below are two suggested paths:

1. Migrate to the New AI SDK Provider

The documentation now recommends using the new AI SDK OpenAI Provider (and its corresponding streaming helpers). For instance, instead of using OpenAIStream and StreamingTextResponse, you’d use the new streaming functions (e.g. streamText) as documented. An updated example might look like:

JSCopied
import { openai } from '@ai-sdk/openai'
import { streamText } from 'ai'

export async function POST(req) {
  const { messages } = await req.json()
  const result = await streamText({
    model: openai('gpt-4-turbo'),
    messages,
  })
  
  return new Response(result.toAIStream())
}

2. Use a Compatible ai Version

If you prefer to keep your existing code using OpenAIStream and StreamingTextResponse, you may pin your package version to one that still exports these functions. For example, you might downgrade to a version below 4.x (if your project and dependencies allow it).

Summary

Your error occurs because in version 4.0.22 the legacy export StreamingTextResponse has been removed. Either update your code to follow the latest patterns by migrating to the AI SDK OpenAI Provider (and its streaming helpers) or downgrade the package to a version that supports your current functions.