diff --git a/tests/model-alias-map.test.cjs b/tests/model-alias-map.test.cjs
new file mode 100644
index 000000000..1e21960d6
--- /dev/null
+++ b/tests/model-alias-map.test.cjs
@@ -0,0 +1,27 @@
+/**
+ * GSD Tools Tests - MODEL_ALIAS_MAP
+ *
+ * Verifies that model aliases map to current Claude model IDs.
+ * Regression test for #1690: aliases were pointing to outdated model versions.
+ *
+ * Uses node:test and node:assert/strict (NOT Jest).
+ */
+
+const { test, describe } = require('node:test');
+const assert = require('node:assert/strict');
+
+const { MODEL_ALIAS_MAP } = require('../get-shit-done/bin/lib/core.cjs');
+
+describe('MODEL_ALIAS_MAP (#1690 regression)', () => {
+  test('opus maps to claude-opus-4-6', () => {
+    assert.equal(MODEL_ALIAS_MAP.opus, 'claude-opus-4-6');
+  });
+
+  test('sonnet maps to claude-sonnet-4-6', () => {
+    assert.equal(MODEL_ALIAS_MAP.sonnet, 'claude-sonnet-4-6');
+  });
+
+  test('haiku maps to claude-haiku-4-5', () => {
+    assert.equal(MODEL_ALIAS_MAP.haiku, 'claude-haiku-4-5');
+  });
+});