diff --git a/packages/ai/src/providers/openai-codex/request-transformer.ts b/packages/ai/src/providers/openai-codex/request-transformer.ts
index df0e8be0d..91abe9dc5 100644
--- a/packages/ai/src/providers/openai-codex/request-transformer.ts
+++ b/packages/ai/src/providers/openai-codex/request-transformer.ts
@@ -40,10 +40,6 @@ export interface RequestBody {
 	presence_penalty?: number;
 	repetition_penalty?: number;
 	reasoning?: Partial<ReasoningConfig>;
-	stream_options?: {
-		include_obfuscation?: boolean;
-		[key: string]: unknown;
-	};
 	text?: {
 		verbosity?: "low" | "medium" | "high";
 	};
@@ -165,8 +161,6 @@ export async function transformRequestBody(
 ): Promise<RequestBody> {
 	body.store = false;
 	body.stream = true;
-	body.stream_options ??= {};
-	body.stream_options.include_obfuscation = false;
 
 	if (body.input && Array.isArray(body.input)) {
 		body.input = filterInput(body.input);
diff --git a/packages/ai/test/openai-codex-stream.test.ts b/packages/ai/test/openai-codex-stream.test.ts
index 9de1fb94f..2904b6a10 100644
--- a/packages/ai/test/openai-codex-stream.test.ts
+++ b/packages/ai/test/openai-codex-stream.test.ts
@@ -435,11 +435,7 @@ describe("openai-codex streaming", () => {
 		expect(outbound).toBeDefined();
 		expect(outbound.raw[0]).toMatch(/^: ws → /);
 		expect(outbound.data.length).toBeGreaterThan(0);
-		const outboundRequest = JSON.parse(outbound.data) as Record<string, unknown>;
-		expect(outboundRequest).toMatchObject({
-			type: "response.create",
-			stream_options: { include_obfuscation: false },
-		});
+		expect(() => JSON.parse(outbound.data)).not.toThrow();
 
 		// Inbound frames mirror the Codex response sequence emitted by `emitCodexResponse`.
 		expect(inbound.map(e => e.event)).toEqual([