diff --git a/.changeset/brown-clocks-dream.md b/.changeset/brown-clocks-dream.md
new file mode 100644
index 000000000..b86452ff1
--- /dev/null
+++ b/.changeset/brown-clocks-dream.md
@@ -0,0 +1,5 @@
+---
+"@assistant-ui/react": patch
+---
+
+feat(runtimes/edge): dynamic model creator functions
diff --git a/packages/react/src/runtimes/edge/EdgeRuntimeRequestOptions.ts b/packages/react/src/runtimes/edge/EdgeRuntimeRequestOptions.ts
index de5d43417..3ca4065dc 100644
--- a/packages/react/src/runtimes/edge/EdgeRuntimeRequestOptions.ts
+++ b/packages/react/src/runtimes/edge/EdgeRuntimeRequestOptions.ts
@@ -1,7 +1,13 @@
 import { CoreMessage } from "../../types";
 import { LanguageModelV1FunctionTool } from "@ai-sdk/provider";
 
-export type EdgeRuntimeRequestOptions = {
+export type LanguageModelConfig = {
+  apiKey?: string | undefined;
+  baseUrl?: string | undefined;
+  modelName?: string | undefined;
+};
+
+export type EdgeRuntimeRequestOptions = LanguageModelConfig & {
   system?: string | undefined;
   messages: CoreMessage[];
   tools: LanguageModelV1FunctionTool[];
diff --git a/packages/react/src/runtimes/edge/createEdgeRuntimeAPI.ts b/packages/react/src/runtimes/edge/createEdgeRuntimeAPI.ts
index e78b57396..8fd35e028 100644
--- a/packages/react/src/runtimes/edge/createEdgeRuntimeAPI.ts
+++ b/packages/react/src/runtimes/edge/createEdgeRuntimeAPI.ts
@@ -10,7 +10,10 @@ import {
 } from "@ai-sdk/provider";
 import { CoreAssistantMessage, CoreMessage } from "../../types/AssistantTypes";
 import { assistantEncoderStream } from "./streams/assistantEncoderStream";
-import { EdgeRuntimeRequestOptions } from "./EdgeRuntimeRequestOptions";
+import {
+  EdgeRuntimeRequestOptions,
+  LanguageModelConfig,
+} from "./EdgeRuntimeRequestOptions";
 import { toLanguageModelMessages } from "./converters/toLanguageModelMessages";
 import { z } from "zod";
 import { Tool } from "../../types";
@@ -53,8 +56,12 @@ type FinishResult = {
     | undefined;
 };
 
+type LanguageModelCreator = (
+  config: LanguageModelConfig,
+) => Promise<LanguageModelV1> | LanguageModelV1;
+
 type CreateEdgeRuntimeAPIOptions = LanguageModelSettings & {
-  model: LanguageModelV1;
+  model: LanguageModelV1 | LanguageModelCreator;
   system?: string;
   tools?: Record<string, Tool<any, any>>;
   toolChoice?: LanguageModelV1ToolChoice;
@@ -70,7 +77,7 @@ const voidStream = () => {
 };
 
 export const createEdgeRuntimeAPI = ({
-  model,
+  model: modelOrCreator,
   system: serverSystem,
   tools: serverTools = {},
   toolChoice,
@@ -86,6 +93,9 @@ export const createEdgeRuntimeAPI = ({
       system: clientSystem,
       tools: clientTools,
       messages,
+      apiKey,
+      baseUrl,
+      modelName,
     } = (await request.json()) as EdgeRuntimeRequestOptions;
 
     const systemMessages = [];
@@ -101,6 +111,11 @@ export const createEdgeRuntimeAPI = ({
       }
     }
 
+    const model =
+      typeof modelOrCreator === "function"
+        ? await modelOrCreator({ apiKey, baseUrl, modelName })
+        : modelOrCreator;
+
     let stream: ReadableStream<ToolResultStreamPart>;
     const streamResult = await streamMessage({
       ...(settings as Partial<StreamMessageOptions>),