diff --git a/packages/ai/src/utils/retry.ts b/packages/ai/src/utils/retry.ts
index a1e984032..eabf6c7de 100644
--- a/packages/ai/src/utils/retry.ts
+++ b/packages/ai/src/utils/retry.ts
@@ -28,6 +28,10 @@ const NON_RETRYABLE_PROVIDER_LIMIT_ERROR_PATTERN = buildProviderErrorPattern([
 	// Sign in with ChatGPT on a ChatGPT Business plan: a usage limit set by the
 	// workspace admin. Only the admin can raise it.
 	"subscription_sharing_workplace_individual_usage_limit_exceeded",
+
+	// Zhipu/Z.ai (open.bigmodel.cn) error code 1308: the plan's usage limit is
+	// reached, sent as HTTP 429. It resets after hours, not seconds (#11537).
+	'"code"\\s*:\\s*"?1308(?![0-9])',
 ]);
 
 const RETRYABLE_PROVIDER_ERROR_PATTERN = buildProviderErrorPattern([