diff --git a/config/models.js b/config/models.js
index 16742bee..8391ff4f 100644
--- a/config/models.js
+++ b/config/models.js
@@ -5,6 +5,7 @@
 
 const CLAUDE_MODELS = [
   { value: 'claude-opus-4-6', label: 'Claude Opus 4.6' },
+  { value: 'claude-sonnet-4-6', label: 'Claude Sonnet 4.6' },
   { value: 'claude-opus-4-5-20251101', label: 'Claude Opus 4.5' },
   { value: 'claude-sonnet-4-5-20250929', label: 'Claude Sonnet 4.5' },
   { value: 'claude-sonnet-4-20250514', label: 'Claude Sonnet 4' },
diff --git a/tests/modelsConfig.test.js b/tests/modelsConfig.test.js
new file mode 100644
index 00000000..0d3ce5ed
--- /dev/null
+++ b/tests/modelsConfig.test.js
@@ -0,0 +1,10 @@
+const { CLAUDE_MODELS } = require('../config/models')
+
+describe('models config', () => {
+  it('places Claude Sonnet 4.6 as the second Claude model option', () => {
+    expect(CLAUDE_MODELS[1]).toEqual({
+      value: 'claude-sonnet-4-6',
+      label: 'Claude Sonnet 4.6'
+    })
+  })
+})