diff --git a/packages/openai-adapters/src/apis/OpenAI.test.ts b/packages/openai-adapters/src/apis/OpenAI.test.ts
new file mode 100644
index 0000000000..9f2a5d05a0
--- /dev/null
+++ b/packages/openai-adapters/src/apis/OpenAI.test.ts
@@ -0,0 +1,33 @@
+import { describe, expect, test } from "vitest";
+import { OpenAIApi } from "./OpenAI.js";
+
+describe("OpenAIApi", () => {
+  test("converts Continue request timeout seconds to OpenAI SDK milliseconds", () => {
+    const api = new OpenAIApi({
+      provider: "openai",
+      apiKey: "test-api-key",
+      requestOptions: { timeout: 300 },
+    });
+
+    expect(api.openai.timeout).toBe(300_000);
+  });
+
+  test("preserves an omitted timeout so the OpenAI SDK default still applies", () => {
+    const api = new OpenAIApi({
+      provider: "openai",
+      apiKey: "test-api-key",
+    });
+
+    expect(api.openai.timeout).toBe(600_000);
+  });
+
+  test("preserves an explicit zero timeout instead of treating it as omitted", () => {
+    const api = new OpenAIApi({
+      provider: "openai",
+      apiKey: "test-api-key",
+      requestOptions: { timeout: 0 },
+    });
+
+    expect(api.openai.timeout).toBe(0);
+  });
+});
diff --git a/packages/openai-adapters/src/apis/OpenAI.ts b/packages/openai-adapters/src/apis/OpenAI.ts
index d0f8d30ca3..5012002dcf 100644
--- a/packages/openai-adapters/src/apis/OpenAI.ts
+++ b/packages/openai-adapters/src/apis/OpenAI.ts
@@ -32,6 +32,10 @@ import {
   toResponsesParams,
 } from "./openaiResponses.js";
 
+function toOpenAISdkTimeout(timeoutSeconds?: number): number | undefined {
+  return timeoutSeconds === undefined ? undefined : timeoutSeconds * 1000;
+}
+
 export class OpenAIApi implements BaseLlmApi {
   openai: OpenAI;
   apiBase: string = "https://api.openai.com/v1/";
@@ -45,7 +49,7 @@ export class OpenAIApi implements BaseLlmApi {
       apiKey: config.apiKey ?? "",
       baseURL: this.apiBase,
       fetch: customFetch(config.requestOptions),
-      timeout: config?.requestOptions?.timeout || undefined,
+      timeout: toOpenAISdkTimeout(config?.requestOptions?.timeout),
     });
   }
   modifyChatBody<T extends ChatCompletionCreateParams>(body: T): T {