feat(gateway): add discounted Stealth Claude Opus model

apps/web/src/app/api/openrouter/[...path]/route.ts

@@ -28,6 +28,7 @@ import {
   isExcludedForFeature,
   isKiloExclusiveFreeModel,
   isKiloStealthModel,
+  requiresKiloDataCollection,
 } from '@/lib/ai-gateway/models';
 import { isFreeModel } from '@/lib/ai-gateway/is-free-model';
 import {
@@ -498,7 +499,7 @@ export async function POST(request: NextRequest): Promise<NextResponseType<unkno
   });
 
   if (
-    isKiloExclusiveFreeModel(originalModelIdLowerCased) &&
+    requiresKiloDataCollection(originalModelIdLowerCased) &&
     !isFreePromptTrainingAllowed(requestBodyParsed.body.provider)
   ) {
     return dataCollectionRequiredResponse();

apps/web/src/lib/ai-gateway/models.test.ts

@@ -1,7 +1,9 @@
 import { describe, test, expect } from '@jest/globals';
-import { autoFreeModels, kiloExclusiveModels } from './models';
+import { autoFreeModels, kiloExclusiveModels, requiresKiloDataCollection } from './models';
 import { isFreeModel } from './is-free-model';
 import { getInferenceProvider } from './providers/kilo-exclusive-model';
+import { claude_opus_4_7_stealth_model } from './providers/anthropic.constants';
+import { qwen36_plus_model } from './providers/qwen';
 
 describe('isFreeModel', () => {
   describe('free models', () => {
@@ -54,6 +56,16 @@ describe('isFreeModel', () => {
       }
     });
 
+    test('routes the discounted Claude Opus offering through the stealth provider identity', () => {
+      expect(getInferenceProvider(claude_opus_4_7_stealth_model)).toBe('stealth');
+      expect(claude_opus_4_7_stealth_model.public_id).toBe('stealth/claude-opus-4.7');
+    });
+
+    test('requires data collection for paid training-enabled offerings', () => {
+      expect(requiresKiloDataCollection(claude_opus_4_7_stealth_model.public_id)).toBe(true);
+      expect(requiresKiloDataCollection(qwen36_plus_model.public_id)).toBe(false);
+    });
+
     test('all Kilo exclusive models should have either no pricing or valid pricing', () => {
       // Verify that all kilo exclusive models have valid pricing structure
       for (const model of kiloExclusiveModels) {

apps/web/src/lib/ai-gateway/models.ts

@@ -10,6 +10,7 @@ import {
 } from '@/lib/ai-gateway/auto-model';
 import {
   CLAUDE_OPUS_CURRENT_MODEL_ID,
+  claude_opus_4_7_stealth_model,
   claude_sonnet_clawsetup_model,
   CLAUDE_SONNET_CURRENT_MODEL_ID,
 } from '@/lib/ai-gateway/providers/anthropic.constants';
@@ -80,9 +81,19 @@ export const kiloExclusiveModels = [
   seed_20_code_free_model,
   ...alibabaDirectModels,
   claude_sonnet_clawsetup_model,
+  claude_opus_4_7_stealth_model,
   stepfun_35_flash_free_model,
 ] as KiloExclusiveModel[];
 
+export function requiresKiloDataCollection(model: string): boolean {
+  return kiloExclusiveModels.some(
+    m =>
+      m.public_id === model &&
+      m.status !== 'disabled' &&
+      (!m.pricing || m.flags.includes('requires-data-collection'))
+  );
+}
+
 export function isKiloStealthModel(model: string): boolean {
   return kiloExclusiveModels.some(m => m.public_id === model && m.flags.includes('stealth'));
 }

apps/web/src/lib/ai-gateway/processUsage.calculatKiloExclusiveCost.test.ts

@@ -2,6 +2,7 @@ import { test, describe, expect } from '@jest/globals';
 import { calculateKiloExclusiveCost_mUsd } from './processUsage';
 import type { JustTheCostsUsageStats } from './processUsage.types';
 import type { KiloExclusiveModel } from '@/lib/ai-gateway/providers/kilo-exclusive-model';
+import { claude_opus_4_7_stealth_model } from '@/lib/ai-gateway/providers/anthropic.constants';
 import {
   qwen36_27b_model,
   qwen36_flash_model,
@@ -401,6 +402,29 @@ describe('calculatKiloExclusiveCost_mUsd with qwen3.6-max-preview', () => {
   });
 });
 
+describe('calculatKiloExclusiveCost_mUsd with stealth Claude Opus 4.7', () => {
+  test('uses the 20% lower flat price for uncached tokens', () => {
+    const result = calculateKiloExclusiveCost_mUsd(
+      claude_opus_4_7_stealth_model,
+      makeUsage({ inputTokens: 100_000, outputTokens: 10_000 })
+    );
+    expect(result).toBe(600_000);
+  });
+
+  test('uses the discounted Anthropic-compatible cache prices', () => {
+    const result = calculateKiloExclusiveCost_mUsd(
+      claude_opus_4_7_stealth_model,
+      makeUsage({
+        inputTokens: 150_000,
+        outputTokens: 10_000,
+        cacheHitTokens: 25_000,
+        cacheWriteTokens: 25_000,
+      })
+    );
+    expect(result).toBe(735_000);
+  });
+});
+
 describe('calculatKiloExclusiveCost_mUsd with qwen3.6-27b', () => {
   // Pre-discount prices (35% Kilo discount applied in code):
   //   Input: $0.5/1M → $0.325/1M   Output: $5/1M → $3.25/1M

apps/web/src/lib/ai-gateway/providers/anthropic.constants.ts

@@ -1,13 +1,46 @@
-import type { KiloExclusiveModel } from '@/lib/ai-gateway/providers/kilo-exclusive-model';
+import type {
+  KiloExclusiveModel,
+  Pricing,
+  Usage,
+} from '@/lib/ai-gateway/providers/kilo-exclusive-model';
 
 export const CLAUDE_SONNET_CURRENT_MODEL_ID = 'anthropic/claude-sonnet-4.6';
 export const CLAUDE_OPUS_CURRENT_MODEL_ID = 'anthropic/claude-opus-4.7';
 export const CLAUDE_HAIKU_CURRENT_MODEL_ID = 'anthropic/claude-haiku-4.5';
+export const CLAUDE_OPUS_STEALTH_MODEL_ID = 'stealth/claude-opus-4.7';
 
 export const CLAUDE_SONNET_CURRENT_VERCEL_MODEL_ID = CLAUDE_SONNET_CURRENT_MODEL_ID;
 export const CLAUDE_OPUS_CURRENT_VERCEL_MODEL_ID = CLAUDE_OPUS_CURRENT_MODEL_ID;
 export const CLAUDE_HAIKU_CURRENT_VERCEL_MODEL_ID = CLAUDE_HAIKU_CURRENT_MODEL_ID;
 
+const CLAUDE_OPUS_STEALTH_PRICING: Pricing = {
+  prompt_per_million: 4,
+  completion_per_million: 20,
+  input_cache_read_per_million: 0.4,
+  input_cache_write_per_million: 5,
+  calculate_mUsd: (usage: Usage) =>
+    usage.uncachedInputTokens * 4 +
+    usage.totalOutputTokens * 20 +
+    usage.cacheHitTokens * 0.4 +
+    usage.cacheWriteTokens * 5,
+};
+
+export const claude_opus_4_7_stealth_model: KiloExclusiveModel = {
+  public_id: CLAUDE_OPUS_STEALTH_MODEL_ID,
+  internal_id: 'anthropic/claude-opus-4-7:optimized',
+  display_name: 'Stealth: Claude Opus 4.7 (20% off)',
+  description:
+    "Your prompts and completions may be retained and used to train or improve the provider's services. This third-party-served variant of Claude Opus 4.7 is offered at 20% lower cost than standard Claude Opus 4.7 pricing and is not served by Anthropic or Kilo Code.",
+  status: 'public',
+  context_length: 1_000_000,
+  max_completion_tokens: 128_000,
+  gateway: 'martian',
+  flags: ['reasoning', 'vision', 'stealth', 'requires-data-collection'],
+  pricing: CLAUDE_OPUS_STEALTH_PRICING,
+  exclusive_to: [],
+  inference_provider_restriction: [],
+};
+
 export const claude_sonnet_clawsetup_model: KiloExclusiveModel = {
   public_id: CLAUDE_SONNET_CURRENT_MODEL_ID + ':clawsetup',
   internal_id: CLAUDE_SONNET_CURRENT_MODEL_ID,

apps/web/src/lib/ai-gateway/providers/kilo-exclusive-model.ts

@@ -6,7 +6,12 @@ import {
 import type { ProviderId } from '@/lib/ai-gateway/providers/types';
 import type { GatewayRequest } from '@/lib/ai-gateway/providers/openrouter/types';
 
-export type KiloExclusiveModelFlag = 'reasoning' | 'vision' | 'stealth' | 'vercel-routing';
+export type KiloExclusiveModelFlag =
+  | 'reasoning'
+  | 'vision'
+  | 'stealth'
+  | 'vercel-routing'
+  | 'requires-data-collection';
 
 export type Usage = {
   uncachedInputTokens: number;

apps/web/src/lib/ai-gateway/providers/provider-definitions.ts

@@ -52,7 +52,7 @@ export default {
     id: 'martian',
     apiUrl: 'https://api.withmartian.com/v1',
     apiKey: getEnvVariable('MARTIAN_API_KEY'),
-    supportedChatApis: ['responses'],
+    supportedChatApis: ['responses', 'messages'],
     transformRequest() {},
   },
   MISTRAL: {