Add support for vercel ai-sdk v5

[eli-front]

The AI SDK v5 introduces some breaking changes for the providers

• https://ai-sdk.dev/docs/announcing-ai-sdk-5-alpha

[markwitt1]

Hey Cloudflare team, thanks for your work on this. Would be great to prioritize this issue, as AI SDK v5 is now generally available

[jahands]

+1 would really like to see this. Everything will be much nicer once we can use Zod 4 everywhere.

[whoiskatrin]

hey, thanks everyone, we are looking into this and will try to land it ASAP

[jjrise]

thanks @whoiskatrin !

[davidsoderberg]

This blocks me from upgrading to v5

[threepointone]

should be released this week via https://github.com/cloudflare/ai/pulls, but you can try it out today with workers-ai-provider@beta, please try it and lemme know if you find any issues

[threepointone]

sorry, I mean via npm i https://pkg.pr.new/cloudflare/ai/workers-ai-provider@269

[threepointone]

released in 2.0.0!