diff --git a/packages/llms/vitest.config.js b/packages/llms/vitest.config.js
index 4ba2a14..0585a75 100644
--- a/packages/llms/vitest.config.js
+++ b/packages/llms/vitest.config.js
@@ -4,6 +4,8 @@ export default defineConfig({
 	test: {
 		name: 'llms',
 		include: ['src/**/*.test.ts'],
+		// Keep live provider suites under OpenRouter's ~20 req/min free-route cap.
+		maxConcurrency: 2,
 		// Suppress console output from passing tests; failed tests still get their logs.
 		silent: 'passed-only',
 	},