---
title: "Discussion on \"Migrating v4 to v5 in Vercel's AI SDK\" | Hashnode"
description: "Discussion on \"Migrating v4 to v5 in Vercel's AI SDK\". Couple confusing breaking changes between the versions on streaming responses, image attachments and message parts."
url: "https://hashnode.com/posts/migrating-v4-to-v5-in-vercels-ai-sdk/68fa029c9cdab0e9279b853a"
---

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# [Migrating v4 to v5 in Vercel's AI SDK](https://lukasnotes.dk/migrating-v4-to-v5-in-vercels-ai-sdk?utm_source=hashnode&utm_medium=feed)

Couple confusing breaking changes between the versions on streaming responses, image attachments and message parts.

Oct 23, 2025 · 11 min read · lukasnotes.dk  
Updated Oct 28, 2025  
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## Written by

[Lukas](https://hashnode.com/@flexchar)

@flexchar · Copenhagen, DK

  
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A developer you can trust.

I've discovered coding back in 2013 and three years later I spent all my summer building my first Laravel app which is still in production by the non-profit I've built for. Now I'm struggling to find the balance between enjoying the power of "I can build this myself" and not chocking myself to death trying to build everything myself. As it is common for developers to be less articulate, I decided to leverage writing about my endeavours, to keep me up.

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