diff --git a/.changeset/slimy-cherries-shake.md b/.changeset/slimy-cherries-shake.md
new file mode 100644
index 00000000000..4daed11d0b1
--- /dev/null
+++ b/.changeset/slimy-cherries-shake.md
@@ -0,0 +1,5 @@
+---
+'ai': patch
+---
+
+Fix regression with generated ids
diff --git a/packages/core/react/use-chat.ts b/packages/core/react/use-chat.ts
index 5e0db495cf9..29d7085f9e3 100644
--- a/packages/core/react/use-chat.ts
+++ b/packages/core/react/use-chat.ts
@@ -1,4 +1,4 @@
-import { useCallback, useEffect, useRef, useState } from 'react'
+import { useCallback, useEffect, useId, useRef, useState } from 'react'
 import useSWRMutation from 'swr/mutation'
 import useSWR, { KeyedMutator } from 'swr'
 import { nanoid, createChunkDecoder } from '../shared/utils'
@@ -8,9 +8,14 @@ import type {
   CreateMessage,
   Message,
   UseChatOptions,
+  RequestOptions,
   ChatRequestOptions
 } from '../shared/types'
-import { ChatCompletionRequestMessageFunctionCall } from 'openai-edge'
+import {
+  ChatCompletionRequestMessageFunctionCall,
+  CreateChatCompletionRequestFunctionCall
+} from 'openai-edge'
+import { ChatCompletionFunctions } from 'openai-edge/types/api'
 export type { Message, CreateMessage, UseChatOptions }
 
 export type UseChatHelpers = {
@@ -207,7 +212,8 @@ export function useChat({
   body
 }: UseChatOptions = {}): UseChatHelpers {
   // Generate a unique id for the chat if not provided.
-  const chatId = id || `chat-${nanoid()}`
+  const hookId = useId()
+  const chatId = id || hookId
 
   // Store the chat state in SWR, using the chatId as the key to share states.
   const { data, mutate } = useSWR<Message[]>([api, chatId], null, {
diff --git a/packages/core/react/use-completion.ts b/packages/core/react/use-completion.ts
index 521dd39323f..8a3336ea8e9 100644
--- a/packages/core/react/use-completion.ts
+++ b/packages/core/react/use-completion.ts
@@ -1,8 +1,8 @@
-import { useCallback, useEffect, useRef, useState } from 'react'
+import { useCallback, useEffect, useId, useRef, useState } from 'react'
 import useSWRMutation from 'swr/mutation'
 import useSWR from 'swr'
 
-import { createChunkDecoder, nanoid } from '../shared/utils'
+import { createChunkDecoder } from '../shared/utils'
 import { UseCompletionOptions, RequestOptions } from '../shared/types'
 
 export type UseCompletionHelpers = {
@@ -67,7 +67,9 @@ export function useCompletion({
   onFinish,
   onError
 }: UseCompletionOptions = {}): UseCompletionHelpers {
-  const completionId = id || `completion-${nanoid()}`
+  // Generate an unique id for the completion if not provided.
+  const hookId = useId()
+  const completionId = id || hookId
 
   // Store the completion state in SWR, using the completionId as the key to share states.
   const { data, mutate } = useSWR<string>([api, completionId], null, {
diff --git a/packages/core/svelte/use-chat.ts b/packages/core/svelte/use-chat.ts
index 51d94c69cec..8d8600144e7 100644
--- a/packages/core/svelte/use-chat.ts
+++ b/packages/core/svelte/use-chat.ts
@@ -50,6 +50,8 @@ export type UseChatHelpers = {
   isLoading: Writable<boolean>
 }
 
+let uniqueId = 0
+
 const store: Record<string, Message[] | undefined> = {}
 
 export function useChat({
@@ -66,7 +68,7 @@ export function useChat({
   body
 }: UseChatOptions = {}): UseChatHelpers {
   // Generate a unique ID for the chat if not provided.
-  const chatId = id || `chat-${nanoid()}`
+  const chatId = id || `chat-${uniqueId++}`
 
   const key = `${api}|${chatId}`
   const { data, mutate: originalMutate } = useSWR<Message[]>(key, {
diff --git a/packages/core/svelte/use-completion.ts b/packages/core/svelte/use-completion.ts
index 90ea7be402a..f5840584816 100644
--- a/packages/core/svelte/use-completion.ts
+++ b/packages/core/svelte/use-completion.ts
@@ -4,7 +4,7 @@ import { Readable, get, writable } from 'svelte/store'
 import { Writable } from 'svelte/store'
 
 import type { UseCompletionOptions, RequestOptions } from '../shared/types'
-import { createChunkDecoder, nanoid } from '../shared/utils'
+import { createChunkDecoder } from '../shared/utils'
 
 export type UseCompletionHelpers = {
   /** The current completion result */
@@ -42,6 +42,8 @@ export type UseCompletionHelpers = {
   isLoading: Writable<boolean>
 }
 
+let uniqueId = 0
+
 const store: Record<string, any> = {}
 
 export function useCompletion({
@@ -57,7 +59,7 @@ export function useCompletion({
   onError
 }: UseCompletionOptions = {}): UseCompletionHelpers {
   // Generate an unique id for the completion if not provided.
-  const completionId = id || `completion-${nanoid()}`
+  const completionId = id || `completion-${uniqueId++}`
 
   const key = `${api}|${completionId}`
   const { data, mutate: originalMutate } = useSWR<string>(key, {
diff --git a/packages/core/vue/use-chat.ts b/packages/core/vue/use-chat.ts
index 0bfd886508d..f6818253c04 100644
--- a/packages/core/vue/use-chat.ts
+++ b/packages/core/vue/use-chat.ts
@@ -49,6 +49,8 @@ export type UseChatHelpers = {
   isLoading: Ref<boolean>
 }
 
+let uniqueId = 0
+
 // @ts-expect-error - some issues with the default export of useSWRV
 const useSWRV = (swrv.default as typeof import('swrv')['default']) || swrv
 const store: Record<string, Message[] | undefined> = {}
@@ -67,7 +69,7 @@ export function useChat({
   body
 }: UseChatOptions = {}): UseChatHelpers {
   // Generate a unique ID for the chat if not provided.
-  const chatId = id || `chat-${nanoid()}`
+  const chatId = id || `chat-${uniqueId++}`
 
   const key = `${api}|${chatId}`
   const { data, mutate: originalMutate } = useSWRV<Message[]>(
diff --git a/packages/core/vue/use-completion.ts b/packages/core/vue/use-completion.ts
index b0e67d66752..1d49c1f5c3a 100644
--- a/packages/core/vue/use-completion.ts
+++ b/packages/core/vue/use-completion.ts
@@ -3,7 +3,7 @@ import { ref } from 'vue'
 import type { Ref } from 'vue'
 
 import type { UseCompletionOptions, RequestOptions } from '../shared/types'
-import { createChunkDecoder, nanoid } from '../shared/utils'
+import { createChunkDecoder } from '../shared/utils'
 
 export type UseCompletionHelpers = {
   /** The current completion result */
@@ -41,6 +41,8 @@ export type UseCompletionHelpers = {
   isLoading: Ref<boolean>
 }
 
+let uniqueId = 0
+
 // @ts-expect-error - some issues with the default export of useSWRV
 const useSWRV = (swrv.default as typeof import('swrv')['default']) || swrv
 const store: Record<string, any> = {}
@@ -58,7 +60,7 @@ export function useCompletion({
   onError
 }: UseCompletionOptions = {}): UseCompletionHelpers {
   // Generate an unique id for the completion if not provided.
-  const completionId = id || `completion-${nanoid()}`
+  const completionId = id || `completion-${uniqueId++}`
 
   const key = `${api}|${completionId}`
   const { data, mutate: originalMutate } = useSWRV<string>(