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AI SDK by Vercel - build apps like ChatGPT, Claude, Gemini, and more with a single interface for any model using the Vercel AI Gateway or go direct to OpenAI, Anthropic, Google, or any other model provider.
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title: Model is not assignable to type "LanguageModelV1"
description: Troubleshooting errors related to incompatible models.
# Model is not assignable to type "LanguageModelV1"
## Issue
I have updated the AI SDK and now I get the following error: `Type 'SomeModel' is not assignable to type 'LanguageModelV1'.`
<Note>Similar errors can occur with `EmbeddingModelV4` as well.</Note>
## Background
Sometimes new features are being added to the model specification.
This can cause incompatibilities with older provider versions.
## Solution
Update your provider packages and the AI SDK to the latest version.