feat: support claude opus 5

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

@@ -236,6 +236,22 @@ describe('Model Catalog', () => {
       assert.strictEqual(fable5.extendedContext, true);
     });
 
+    it('includes Claude Opus 5 with adaptive levels and extended context', () => {
+      const { MODEL_CATALOG } = modelCatalog;
+      const opus5 = MODEL_CATALOG.claude.models.find((m) => m.id === 'claude-opus-5');
+      assert(opus5, 'Should include Claude Opus 5');
+      assert.strictEqual(opus5.name, 'Claude Opus 5');
+      // Opus 5 requires adaptive thinking (type: 'levels') like Sonnet 5 and Opus 4.8;
+      // manual budget_tokens is rejected with 400. Proxy reports zero + dynamic allowed.
+      assert.strictEqual(opus5.thinking.type, 'levels');
+      assert.deepStrictEqual(opus5.thinking.levels, ['low', 'medium', 'high', 'xhigh', 'max']);
+      assert.strictEqual(opus5.thinking.maxLevel, 'max');
+      assert.strictEqual(opus5.thinking.zeroAllowed, true);
+      assert.strictEqual(opus5.thinking.dynamicAllowed, true);
+      assert.strictEqual(opus5.nativeImageInput, true);
+      assert.strictEqual(opus5.extendedContext, true);
+    });
+
     it('retains previous 4.5 snapshot models for explicit selection', () => {
       const { MODEL_CATALOG } = modelCatalog;
       const ids = MODEL_CATALOG.claude.models.map((m) => m.id);

src/cliproxy/model-catalog.ts

@@ -499,6 +499,23 @@ export const MODEL_CATALOG: Partial<Record<CLIProxyProvider, ProviderCatalog>> =
         },
         extendedContext: true,
       },
+      {
+        id: 'claude-opus-5',
+        name: 'Claude Opus 5',
+        description: 'Latest premium model',
+        nativeImageInput: true,
+        // Opus 5 (released 2026-07-14) uses adaptive thinking, matching Sonnet 5
+        // and Opus 4.8: Anthropic accepts only effort levels; manual budget_tokens
+        // is rejected with 400. Proxy metadata reports zero + dynamic allowed.
+        thinking: {
+          type: 'levels',
+          levels: ['low', 'medium', 'high', 'xhigh', 'max'],
+          maxLevel: 'max',
+          zeroAllowed: true,
+          dynamicAllowed: true,
+        },
+        extendedContext: true,
+      },
       {
         id: 'claude-opus-4-8',
         name: 'Claude Opus 4.8',

src/web-server/model-pricing.ts

@@ -331,6 +331,28 @@ const PRICING_REGISTRY: Record<string, ModelPricing> = {
       fast: OPUS_48_FAST_RATES,
     },
   },
+  // Claude Opus 5 ($5/$25) — Claude 5 generation Opus (released 2026-07-14).
+  // Rates mirror Opus 4.8 (same Opus tier); fast mode reuses the 2x premium
+  // pending official Opus 5 numbers. Registered explicitly so it resolves to
+  // Opus-tier pricing instead of the unknown-model fallback.
+  'claude-opus-5': {
+    inputPerMillion: 5.0,
+    outputPerMillion: 25.0,
+    cacheCreationPerMillion: 6.25,
+    cacheReadPerMillion: 0.5,
+    serviceTiers: {
+      fast: OPUS_48_FAST_RATES,
+    },
+  },
+  'claude-opus-5-thinking': {
+    inputPerMillion: 5.0,
+    outputPerMillion: 25.0,
+    cacheCreationPerMillion: 6.25,
+    cacheReadPerMillion: 0.5,
+    serviceTiers: {
+      fast: OPUS_48_FAST_RATES,
+    },
+  },
   // Claude Fable 5 ($10/$50) — most powerful tier, above Opus
   'claude-fable-5': {
     inputPerMillion: 10.0,

tests/unit/model-pricing.test.ts

@@ -285,10 +285,26 @@ describe('model-pricing', () => {
       expect(sonnet5.cacheReadPerMillion).toBe(0.3);
     });
 
+    it('should return Opus-tier pricing for Claude Opus 5', () => {
+      // Opus 5 mirrors Opus 4.8 rates; date-stamped ids resolve via stripDateSuffix.
+      const opus5 = getModelPricing('claude-opus-5');
+      expect(opus5.inputPerMillion).toBe(5.0);
+      expect(opus5.outputPerMillion).toBe(25.0);
+      expect(opus5.cacheCreationPerMillion).toBe(6.25);
+      expect(opus5.cacheReadPerMillion).toBe(0.5);
+      expect(getModelPricing('claude-opus-5-20270101').inputPerMillion).toBe(5.0);
+    });
+
+    it('should apply fast-tier pricing for Claude Opus 5', () => {
+      const opus5fast = getModelPricing('claude-opus-5', { serviceTier: 'fast' });
+      expect(opus5fast.inputPerMillion).toBe(10.0);
+      expect(opus5fast.outputPerMillion).toBe(50.0);
+    });
+
     it('should not map unknown future model families onto known family pricing', () => {
       const fallback = getModelPricing('unknown-model-xyz');
 
-      expect(getModelPricing('claude-opus-5-20270101')).toEqual(fallback);
+      expect(getModelPricing('claude-opus-6-20270101')).toEqual(fallback);
       expect(getModelPricing('gemini-3.2-pro')).toEqual(fallback);
     });
   });

ui/src/lib/model-catalogs.ts

@@ -982,6 +982,18 @@ export const MODEL_CATALOGS: Record<string, ProviderCatalog> = {
           haiku: 'claude-haiku-4-5-20251001',
         },
       },
+      {
+        id: 'claude-opus-5',
+        name: 'Claude Opus 5',
+        description: 'Latest premium model',
+        extendedContext: true,
+        presetMapping: {
+          default: 'claude-opus-5',
+          opus: 'claude-opus-5',
+          sonnet: 'claude-sonnet-5',
+          haiku: 'claude-haiku-4-5-20251001',
+        },
+      },
       {
         id: 'claude-opus-4-8',
         name: 'Claude Opus 4.8',