feat: add Sonnet 5 to Claude provider catalog

src/cliproxy/__tests__/model-catalog.test.js

@@ -132,7 +132,19 @@ describe('Model Catalog', () => {
     });
     it('has correct default model', () => {
       const { MODEL_CATALOG } = modelCatalog;
-      assert.strictEqual(MODEL_CATALOG.claude.defaultModel, 'claude-sonnet-4-6');
+      assert.strictEqual(MODEL_CATALOG.claude.defaultModel, 'claude-sonnet-5');
+    });
+
+    it('includes Claude Sonnet 5 with adaptive levels and extended context', () => {
+      const { MODEL_CATALOG } = modelCatalog;
+      const sonnet = MODEL_CATALOG.claude.models.find((m) => m.id === 'claude-sonnet-5');
+      assert(sonnet, 'Should include Claude Sonnet 5');
+      assert.strictEqual(sonnet.name, 'Claude Sonnet 5');
+      assert.strictEqual(sonnet.thinking.type, 'levels');
+      assert.deepStrictEqual(sonnet.thinking.levels, ['low', 'medium', 'high', 'xhigh', 'max']);
+      assert.strictEqual(sonnet.thinking.maxLevel, 'max');
+      assert.strictEqual(sonnet.nativeImageInput, true);
+      assert.strictEqual(sonnet.extendedContext, true);
     });
 
     it('includes Claude Sonnet 4.6', () => {

src/cliproxy/__tests__/thinking-validator.test.ts

@@ -69,6 +69,13 @@ describe('Thinking Validator', () => {
       expect(result.warning).toBeUndefined();
     });
 
+    it('should treat max as a distinct top tier on Claude Sonnet 5', () => {
+      const result = validateThinking('claude', 'claude-sonnet-5', 'max');
+      expect(result.valid).toBe(true);
+      expect(result.value).toBe('max');
+      expect(result.warning).toBeUndefined();
+    });
+
     it('should still alias max -> xhigh for models without a max level (backcompat)', () => {
       // Codex catalog uses ['low','medium','high','xhigh'] with maxLevel 'xhigh'.
       // User input "max" should map down to xhigh rather than be rejected.

src/cliproxy/model-catalog.ts

@@ -367,8 +367,22 @@ export const MODEL_CATALOG: Partial<Record<CLIProxyProvider, ProviderCatalog>> =
   claude: {
     provider: 'claude',
     displayName: 'Claude (Anthropic)',
-    defaultModel: 'claude-sonnet-4-6',
+    defaultModel: 'claude-sonnet-5',
     models: [
+      {
+        id: 'claude-sonnet-5',
+        name: 'Claude Sonnet 5',
+        description: 'Latest Sonnet model',
+        nativeImageInput: true,
+        // Sonnet 5 uses adaptive thinking; manual budget_tokens is rejected with 400.
+        thinking: {
+          type: 'levels',
+          levels: ['low', 'medium', 'high', 'xhigh', 'max'],
+          maxLevel: 'max',
+          dynamicAllowed: true,
+        },
+        extendedContext: true,
+      },
       {
         id: 'claude-fable-5',
         name: 'Claude Fable 5',

ui/src/lib/model-catalogs.ts

@@ -854,8 +854,20 @@ export const MODEL_CATALOGS: Record<string, ProviderCatalog> = {
   claude: {
     provider: 'claude',
     displayName: 'Claude (Anthropic)',
-    defaultModel: 'claude-sonnet-4-6',
+    defaultModel: 'claude-sonnet-5',
     models: [
+      {
+        id: 'claude-sonnet-5',
+        name: 'Claude Sonnet 5',
+        description: 'Latest Sonnet model',
+        extendedContext: true,
+        presetMapping: {
+          default: 'claude-sonnet-5',
+          opus: 'claude-opus-4-8',
+          sonnet: 'claude-sonnet-5',
+          haiku: 'claude-haiku-4-5-20251001',
+        },
+      },
       {
         id: 'claude-fable-5',
         name: 'Claude Fable 5',
@@ -864,7 +876,7 @@ export const MODEL_CATALOGS: Record<string, ProviderCatalog> = {
         presetMapping: {
           default: 'claude-fable-5',
           opus: 'claude-fable-5',
-          sonnet: 'claude-sonnet-4-6',
+          sonnet: 'claude-sonnet-5',
           haiku: 'claude-haiku-4-5-20251001',
         },
       },
@@ -876,7 +888,7 @@ export const MODEL_CATALOGS: Record<string, ProviderCatalog> = {
         presetMapping: {
           default: 'claude-opus-4-8',
           opus: 'claude-opus-4-8',
-          sonnet: 'claude-sonnet-4-6',
+          sonnet: 'claude-sonnet-5',
           haiku: 'claude-haiku-4-5-20251001',
         },
       },
@@ -888,7 +900,7 @@ export const MODEL_CATALOGS: Record<string, ProviderCatalog> = {
         presetMapping: {
           default: 'claude-opus-4-7',
           opus: 'claude-opus-4-7',
-          sonnet: 'claude-sonnet-4-6',
+          sonnet: 'claude-sonnet-5',
           haiku: 'claude-haiku-4-5-20251001',
         },
       },

ui/tests/unit/components/cliproxy/provider-model-selector.test.tsx

@@ -70,7 +70,7 @@ describe('FlexibleModelSelector', () => {
     expect(screen.queryByText(/All Models \(/i)).not.toBeInTheDocument();
   });
 
-  it('surfaces Claude Opus 4.7 in the curated Claude picker', async () => {
+  it('surfaces Claude Sonnet 5 in the curated Claude picker', async () => {
     render(
       <FlexibleModelSelector
         label="Primary model"
@@ -83,8 +83,8 @@ describe('FlexibleModelSelector', () => {
 
     await userEvent.click(screen.getByRole('button', { name: /select model/i }));
 
-    expect(screen.getByRole('option', { name: /claude-opus-4-7/i })).toBeInTheDocument();
-    expect(screen.getByRole('option', { name: /claude-opus-4-6/i })).toBeInTheDocument();
+    expect(screen.getByRole('option', { name: /claude-sonnet-5/i })).toBeInTheDocument();
+    expect(screen.getByRole('option', { name: /claude-opus-4-8/i })).toBeInTheDocument();
     expect(screen.getByRole('option', { name: /claude-sonnet-4-6/i })).toBeInTheDocument();
   });
 
@@ -129,6 +129,28 @@ describe('FlexibleModelSelector', () => {
     expect(onChange).toHaveBeenCalledWith('claude-sonnet-6');
   });
 
+  it('lets users enter a future direct Claude model ID from the CLIProxy picker', async () => {
+    const onChange = vi.fn();
+
+    render(
+      <FlexibleModelSelector
+        label="Primary model"
+        value={undefined}
+        onChange={onChange}
+        catalog={MODEL_CATALOGS.claude}
+        allModels={[]}
+      />
+    );
+
+    await userEvent.click(screen.getByRole('button', { name: /select model/i }));
+    await userEvent.type(await screen.findByPlaceholderText('Search models...'), 'claude-sonnet-6');
+
+    expect(screen.getAllByText('Custom model').length).toBeGreaterThan(0);
+    await userEvent.click(screen.getByRole('option', { name: /claude-sonnet-6/i }));
+
+    expect(onChange).toHaveBeenCalledWith('claude-sonnet-6');
+  });
+
   it('preserves a filtered legacy value under the current-value fallback group', async () => {
     render(
       <FlexibleModelSelector

ui/tests/unit/ui/lib/preset-utils.test.ts

@@ -16,11 +16,12 @@ describe('claude preset utils', () => {
     vi.restoreAllMocks();
   });
 
-  it('keeps the claude catalog default on Sonnet 4.6 while exposing Opus 4.7/4.8 and Fable 5', () => {
+  it('keeps the claude catalog default on Sonnet 5 while exposing recent Claude models', () => {
     const claudeCatalog = MODEL_CATALOGS.claude;
     const ids = claudeCatalog.models.map((model) => model.id);
 
-    expect(claudeCatalog.defaultModel).toBe('claude-sonnet-4-6');
+    expect(claudeCatalog.defaultModel).toBe('claude-sonnet-5');
+    expect(ids).toContain('claude-sonnet-5');
     expect(ids).toContain('claude-fable-5');
     expect(ids).toContain('claude-opus-4-8');
     expect(ids).toContain('claude-opus-4-7');
@@ -50,15 +51,15 @@ describe('claude preset utils', () => {
 
     const result = await applyDefaultPreset('claude');
 
-    expect(result).toEqual({ success: true, presetName: 'Claude Sonnet 4.6' });
+    expect(result).toEqual({ success: true, presetName: 'Claude Sonnet 5' });
 
     const [, requestInit] = fetchMock.mock.calls[2] ?? [];
     const body = JSON.parse(String(requestInit?.body));
 
     expect(body.settings.env).toMatchObject({
-      ANTHROPIC_MODEL: 'claude-sonnet-4-6',
-      ANTHROPIC_DEFAULT_OPUS_MODEL: 'claude-opus-4-6',
-      ANTHROPIC_DEFAULT_SONNET_MODEL: 'claude-sonnet-4-6',
+      ANTHROPIC_MODEL: 'claude-sonnet-5',
+      ANTHROPIC_DEFAULT_OPUS_MODEL: 'claude-opus-4-8',
+      ANTHROPIC_DEFAULT_SONNET_MODEL: 'claude-sonnet-5',
       ANTHROPIC_DEFAULT_HAIKU_MODEL: 'claude-haiku-4-5-20251001',
     });
   });
@@ -76,7 +77,7 @@ describe('claude preset utils', () => {
 
     const result = await applyDefaultPreset('claude', undefined, MODEL_CATALOGS.claude);
 
-    expect(result).toEqual({ success: true, presetName: 'Claude Sonnet 4.6' });
+    expect(result).toEqual({ success: true, presetName: 'Claude Sonnet 5' });
     expect(fetchMock).toHaveBeenCalledTimes(2);
     expect(fetchMock).toHaveBeenNthCalledWith(1, '/api/settings/auth/tokens/raw');
     expect(fetchMock).toHaveBeenNthCalledWith(