diff --git a/docs/guides/CODEX-CLI-CONFIGURATION.md b/docs/guides/CODEX-CLI-CONFIGURATION.md
index 943ca8660786..0749637fe50d 100644
--- a/docs/guides/CODEX-CLI-CONFIGURATION.md
+++ b/docs/guides/CODEX-CLI-CONFIGURATION.md
@@ -79,7 +79,7 @@ Use a real key instead when your OmniRoute server is protected or remote.
 
 Codex CLI deprecated `wire_api = "chat"` (Chat Completions) in February 2026 and now **requires** `wire_api = "responses"` (OpenAI Responses API). Setting `wire_api = "chat"` causes an immediate startup crash since v0.138.
 
-DeepSeek, GLM, Kimi and others only expose a Chat Completions endpoint — not the Responses API. If you pointed Codex directly at them, it would fail.
+Many providers, including GLM and Kimi, still expose only a Chat Completions endpoint. DeepSeek V4 now exposes a native Responses API as well as an Anthropic-compatible endpoint; OmniRoute uses Responses by default and lets each DeepSeek connection select Anthropic compatibility.
 
 **OmniRoute solves this transparently:**
 
@@ -87,8 +87,8 @@ DeepSeek, GLM, Kimi and others only expose a Chat Completions endpoint — not t
 Codex CLI
   → wire_api = "responses"
   → POST /v1/responses (OmniRoute)
-    → OmniRoute Responses ↔ Chat Completions transformer
-    → POST /chat/completions (DeepSeek / Mistral / GLM / Kimi / any provider)
+    → OmniRoute selects the provider's native protocol and translates when needed
+    → POST /responses (DeepSeek V4) or /chat/completions (Mistral / GLM / Kimi / others)
 ```
 
 You never need a separate translation proxy when using OmniRoute. **All models use `wire_api = "responses"`** — OmniRoute handles the rest.
diff --git a/open-sse/config/providers/registry/deepseek/index.ts b/open-sse/config/providers/registry/deepseek/index.ts
index 6825b230789f..933fb9bba1f5 100644
--- a/open-sse/config/providers/registry/deepseek/index.ts
+++ b/open-sse/config/providers/registry/deepseek/index.ts
@@ -1,25 +1,40 @@
-import type { RegistryEntry } from "../../shared.ts";
+import { getAnthropicCompatHeaders, type RegistryEntry } from "../../shared.ts";
 
 export const deepseekProvider: RegistryEntry = {
   id: "deepseek",
   alias: "ds",
-  format: "openai",
+  format: "openai-responses",
   executor: "default",
-  baseUrl: "https://api.deepseek.com/v1/chat/completions",
+  baseUrl: "https://api.deepseek.com/responses",
   authType: "apikey",
   authHeader: "bearer",
+  alternateFormats: [
+    {
+      format: "claude",
+      baseUrl: "https://api.deepseek.com/anthropic/v1/messages",
+      authHeader: "x-api-key",
+      headers: getAnthropicCompatHeaders(),
+      label: "Anthropic-compatible",
+    },
+  ],
   models: [
     {
       id: "deepseek-v4-pro",
-      name: "DeepSeek V4 Pro",
+      name: "DeepSeek V4 Pro (0813)",
+      contextLength: 1_000_000,
+      maxOutputTokens: 384_000,
       supportsReasoning: true,
       supportedThinkingEfforts: ["none", "high", "max"],
+      toolCalling: true,
     },
     {
       id: "deepseek-v4-flash",
-      name: "DeepSeek V4 Flash",
+      name: "DeepSeek V4 Flash (0731)",
+      contextLength: 1_000_000,
+      maxOutputTokens: 384_000,
       supportsReasoning: true,
       supportedThinkingEfforts: ["none", "low", "high", "max"],
+      toolCalling: true,
     },
   ],
 };
diff --git a/open-sse/config/providers/registry/grok-cli/index.ts b/open-sse/config/providers/registry/grok-cli/index.ts
index 75effafe78af..f257f8d60a62 100644
--- a/open-sse/config/providers/registry/grok-cli/index.ts
+++ b/open-sse/config/providers/registry/grok-cli/index.ts
@@ -20,6 +20,15 @@ export const grok_cliProvider: RegistryEntry = {
   authHeader: "bearer",
   passthroughModels: true,
   models: [
+    {
+      id: "grok-4.6",
+      name: "Grok 4.6",
+      contextLength: 500000,
+      supportsReasoning: true,
+      toolCalling: true,
+      targetFormat: "openai-responses",
+      unsupportedParams: ["presencePenalty", "frequencyPenalty", "logprobs", "topLogprobs"],
+    },
     {
       id: "grok-4.5",
       name: "Grok 4.5",
diff --git a/open-sse/config/providers/registry/xai/index.ts b/open-sse/config/providers/registry/xai/index.ts
index f33e247080b3..6d2cc9621adc 100644
--- a/open-sse/config/providers/registry/xai/index.ts
+++ b/open-sse/config/providers/registry/xai/index.ts
@@ -14,6 +14,17 @@ export const xaiProvider: RegistryEntry = {
   authType: "apikey",
   authHeader: "bearer",
   models: [
+    {
+      id: "grok-4.6",
+      name: "Grok 4.6",
+      contextLength: 500000,
+      supportsReasoning: true,
+      supportedThinkingEfforts: ["low", "medium", "high", "xhigh"],
+      supportsVision: true,
+      supportsXHighEffort: true,
+      toolCalling: true,
+      targetFormat: "openai-responses",
+    },
     { id: "grok-4.3", name: "Grok 4.3" },
     { id: "grok-build-0.1", name: "Grok Build 0.1", contextLength: 256000 },
     // Responses-only per upstream 9router#2439: xAI serves this id exclusively
diff --git a/open-sse/handlers/chatCore/targetFormat.ts b/open-sse/handlers/chatCore/targetFormat.ts
index 991a5c3eb2e3..27ce3aa3d83e 100644
--- a/open-sse/handlers/chatCore/targetFormat.ts
+++ b/open-sse/handlers/chatCore/targetFormat.ts
@@ -3,14 +3,17 @@
  * decomposition, #3501).
  *
  * Pure resolution of the provider alias + the upstream target format used to translate the request.
- * Model/custom overrides win first. A Responses-shaped inbound request normally keeps the Responses
- * wire format, except for custom OpenAI-compatible connections explicitly configured for Chat.
+ * Model/custom overrides win first. A declared connection-level alternate protocol wins next. A
+ * Responses-shaped inbound request otherwise keeps the Responses wire format, except for custom
+ * OpenAI-compatible connections explicitly configured for Chat.
  * AgentRouter may inherit the inbound protocol when no explicit connection override exists.
  * Returns both `alias` (reused by the handler when stripping the `alias/` prefix off the upstream
  * model id) and `targetFormat`.
  */
 
 import { PROVIDER_ID_TO_ALIAS, getModelTargetFormat } from "../../config/providerModels.ts";
+import { getRegistryEntry } from "../../config/providerRegistry.ts";
+import { resolveAlternateFormat } from "../../config/providers/alternateFormats.ts";
 import { getTargetFormat } from "../../services/provider.ts";
 import { FORMATS } from "../../translator/formats.ts";
 
@@ -46,15 +49,22 @@ export function resolveChatCoreTargetFormat(opts: {
       ? sourceFormat
       : undefined;
   const providerTargetFormat = getTargetFormat(provider, providerSpecificData);
+  const declaredConnectionAlternate = resolveAlternateFormat(
+    getRegistryEntry(provider),
+    providerSpecificData
+  );
   const customOpenAICompatible = provider.startsWith("openai-compatible-");
   // #8994: model-level targetFormat overrides (from registry or custom-model DB override)
   // take precedence over apiFormat="responses" — otherwise Vertex Claude models with
   // targetFormat="claude" get wrongly routed to OpenAI Responses format.
   // #9161: a custom OpenAI-compatible Chat connection must likewise keep its configured
   // outbound protocol when a Responses-shaped client (for example Codex) calls /responses.
+  // Registry-declared connection alternates are equally explicit: a DeepSeek connection set to
+  // Anthropic must stay on /anthropic/v1/messages even when the caller speaks Responses.
   let targetFormat =
     modelTargetFormat ||
     customModelTargetFormat ||
+    declaredConnectionAlternate?.format ||
     (apiFormat === "responses" && !customOpenAICompatible
       ? FORMATS.OPENAI_RESPONSES
       : inferredAgentRouterTargetFormat || providerTargetFormat);
diff --git a/src/shared/constants/pricing/frontier-labs.ts b/src/shared/constants/pricing/frontier-labs.ts
index 59e580e97111..a7cbf79935fb 100644
--- a/src/shared/constants/pricing/frontier-labs.ts
+++ b/src/shared/constants/pricing/frontier-labs.ts
@@ -315,20 +315,20 @@ export const DEFAULT_PRICING_FRONTIER = {
       reasoning: 2.19,
       cache_creation: 0.55,
     },
-    // DeepSeek V4 Pro — promo until 2026-05-31, then list ($0.145 / $3.48)
+    // DeepSeek official API list prices, checked 2026-08-13.
     "deepseek-v4-pro": {
       input: 0.435,
       output: 0.87,
-      cached: 0.0036,
+      cached: 0.003625,
       reasoning: 0.87,
       cache_creation: 0.435,
     },
     "deepseek-v4-flash": {
-      input: 0.07,
+      input: 0.14,
       output: 0.28,
-      cached: 0.014,
+      cached: 0.0028,
       reasoning: 0.28,
-      cache_creation: 0.07,
+      cache_creation: 0.14,
     },
   },
   blackbox: {
@@ -340,6 +340,15 @@ export const DEFAULT_PRICING_FRONTIER = {
     "blackboxai-pro": { input: 0, output: 0, cached: 0, reasoning: 0, cache_creation: 0 },
   },
   xai: {
+    // The static rate covers prompts below 200K tokens. xAI's provider-reported
+    // cost_in_usd_ticks remains authoritative for the >=200K pricing tier.
+    "grok-4.6": {
+      input: 2.0,
+      output: 6.0,
+      cached: 0.5,
+      reasoning: 6.0,
+      cache_creation: 2.0,
+    },
     "grok-3": {
       input: 3.0,
       output: 15.0,
diff --git a/tests/snapshots/provider/translate-path.json b/tests/snapshots/provider/translate-path.json
index 699c8acbd495..451a11fa09b4 100644
--- a/tests/snapshots/provider/translate-path.json
+++ b/tests/snapshots/provider/translate-path.json
@@ -1604,7 +1604,7 @@
     }
   },
   "deepseek": {
-    "format": "openai",
+    "format": "openai-responses",
     "headers": {
       "apiKey": {
         "Accept": "text/event-stream",
@@ -1622,8 +1622,8 @@
       }
     },
     "url": {
-      "nonStream": "https://api.deepseek.com/v1/chat/completions",
-      "stream": "https://api.deepseek.com/v1/chat/completions"
+      "nonStream": "https://api.deepseek.com/responses",
+      "stream": "https://api.deepseek.com/responses"
     }
   },
   "deepseek-web": {
diff --git a/tests/unit/alternate-formats.test.ts b/tests/unit/alternate-formats.test.ts
index 9aa40d7f348f..c285c7f2c80e 100644
--- a/tests/unit/alternate-formats.test.ts
+++ b/tests/unit/alternate-formats.test.ts
@@ -4,6 +4,8 @@ import { resolveAlternateFormat } from "../../open-sse/config/providers/alternat
 import type { RegistryEntry } from "../../open-sse/config/providers/shared.ts";
 import { getTargetFormat } from "../../open-sse/services/provider.ts";
 import { DefaultExecutor } from "../../open-sse/executors/default.ts";
+import { FORMATS } from "../../open-sse/translator/formats.ts";
+import { translateRequest } from "../../open-sse/translator/index.ts";
 import { getAlternateFormats } from "../../src/app/(dashboard)/dashboard/providers/[id]/providerPageHelpers.ts";
 
 const ENTRY: RegistryEntry = {
@@ -42,7 +44,10 @@ test("retorna null quando a conexao nao tem targetFormat", () => {
 });
 
 test("retorna null quando a entry nao declara alternativas", () => {
-  assert.equal(resolveAlternateFormat({ ...ENTRY, alternateFormats: undefined }, { targetFormat: "claude" }), null);
+  assert.equal(
+    resolveAlternateFormat({ ...ENTRY, alternateFormats: undefined }, { targetFormat: "claude" }),
+    null
+  );
   assert.equal(resolveAlternateFormat(null, { targetFormat: "claude" }), null);
 });
 
@@ -103,7 +108,11 @@ test("resolveBaseUrl: baseUrl manual da conexao vence a alternativa", () => {
 });
 
 test("resolveBaseUrl: alternativa vence o baseUrl padrao", () => {
-  const url = precedence({ targetFormat: "claude" }, ENTRY_WITH_ALT, "https://default.example.com/v1");
+  const url = precedence(
+    { targetFormat: "claude" },
+    ENTRY_WITH_ALT,
+    "https://default.example.com/v1"
+  );
   assert.equal(url, "https://alt.example.com/anthropic/v1/messages");
 });
 
@@ -179,7 +188,81 @@ test("getAlternateFormats: provedor com alternativas retorna a lista", () => {
 });
 
 test("getAlternateFormats: provedor sem alternativas retorna lista vazia", () => {
-  assert.deepEqual(getAlternateFormats("deepseek"), []);
+  assert.deepEqual(getAlternateFormats("xai"), []);
   assert.deepEqual(getAlternateFormats(null), []);
   assert.deepEqual(getAlternateFormats(undefined), []);
 });
+
+test("DeepSeek defaults to Responses and exposes the official Anthropic endpoint", () => {
+  assert.equal(getTargetFormat("deepseek", null), "openai-responses");
+  assert.equal(getTargetFormat("deepseek", { targetFormat: "claude" }), "claude");
+
+  const defaultExecutor = new DefaultExecutor("deepseek");
+  assert.equal(
+    defaultExecutor.buildUrl("deepseek-v4-pro", true, 0, { apiKey: "sk-test" } as never),
+    "https://api.deepseek.com/responses"
+  );
+  const defaultHeaders = defaultExecutor.buildHeaders({ apiKey: "sk-test" } as never, true);
+  assert.equal(defaultHeaders.Authorization, "Bearer sk-test");
+
+  const anthropicCredentials = {
+    apiKey: "sk-test",
+    providerSpecificData: { targetFormat: "claude" },
+  } as never;
+  assert.equal(
+    defaultExecutor.buildUrl("deepseek-v4-pro", true, 0, anthropicCredentials),
+    "https://api.deepseek.com/anthropic/v1/messages"
+  );
+  const anthropicHeaders = defaultExecutor.buildHeaders(anthropicCredentials, true);
+  assert.equal(anthropicHeaders["x-api-key"], "sk-test");
+  assert.equal(typeof anthropicHeaders["Anthropic-Version"], "string");
+
+  const alternates = getAlternateFormats("deepseek");
+  assert.equal(alternates.length, 1);
+  assert.equal(alternates[0].format, "claude");
+});
+
+test("DeepSeek reuses the generic Chat-to-Responses and Responses-to-Anthropic translators", () => {
+  const responsesBody = translateRequest(
+    FORMATS.OPENAI,
+    FORMATS.OPENAI_RESPONSES,
+    "deepseek-v4-pro",
+    {
+      model: "deepseek-v4-pro",
+      messages: [{ role: "user", content: "hello" }],
+      max_tokens: 123,
+      stream: true,
+    },
+    true,
+    {},
+    "deepseek"
+  ) as Record<string, unknown>;
+  assert.equal(responsesBody.messages, undefined);
+  assert.equal(responsesBody.max_output_tokens, 123);
+  assert.deepEqual(responsesBody.input, [
+    {
+      type: "message",
+      role: "user",
+      content: [{ type: "input_text", text: "hello" }],
+      status: "completed",
+    },
+  ]);
+
+  const anthropicBody = translateRequest(
+    FORMATS.OPENAI_RESPONSES,
+    FORMATS.CLAUDE,
+    "deepseek-v4-pro",
+    {
+      model: "deepseek-v4-pro",
+      input: [{ role: "user", content: [{ type: "input_text", text: "hello" }] }],
+      stream: true,
+    },
+    true,
+    {},
+    "deepseek"
+  ) as Record<string, unknown>;
+  assert.equal(anthropicBody.input, undefined);
+  assert.deepEqual(anthropicBody.messages, [
+    { role: "user", content: [{ type: "text", text: "hello" }] },
+  ]);
+});
diff --git a/tests/unit/chat-route-coverage.test.ts b/tests/unit/chat-route-coverage.test.ts
index b7174d635815..e0b71badc966 100644
--- a/tests/unit/chat-route-coverage.test.ts
+++ b/tests/unit/chat-route-coverage.test.ts
@@ -202,6 +202,7 @@ test("handleChat rejects requests without a model", async () => {
 test("handleChat applies task-aware routing when a semantic override is enabled", async () => {
   await seedConnection("deepseek", { apiKey: "sk-deepseek-task-route" });
   const seenAuthHeaders = [];
+  const seenRequestBodies = [];
   setTaskRoutingConfig({
     enabled: true,
     detectionEnabled: true,
@@ -214,7 +215,26 @@ test("handleChat applies task-aware routing when a semantic override is enabled"
   globalThis.fetch = async (_url, init = {}) => {
     const headers = toPlainHeaders(init.headers);
     seenAuthHeaders.push(headers.Authorization ?? headers.authorization);
-    return buildOpenAIResponse("Task-routed response", "deepseek/deepseek-chat");
+    seenRequestBodies.push(JSON.parse(String(init.body)));
+    return new Response(
+      JSON.stringify({
+        id: "resp_task_route",
+        object: "response",
+        status: "completed",
+        model: "deepseek-v4-flash",
+        output: [
+          {
+            id: "msg_task_route",
+            type: "message",
+            role: "assistant",
+            status: "completed",
+            content: [{ type: "output_text", text: "Task-routed response", annotations: [] }],
+          },
+        ],
+        usage: { input_tokens: 4, output_tokens: 2, total_tokens: 6 },
+      }),
+      { status: 200, headers: { "Content-Type": "application/json" } }
+    );
   };
 
   const response = await handleChat(
@@ -230,6 +250,8 @@ test("handleChat applies task-aware routing when a semantic override is enabled"
 
   assert.equal(response.status, 200);
   assert.deepEqual(seenAuthHeaders, ["Bearer sk-deepseek-task-route"]);
+  assert.equal(seenRequestBodies[0].messages, undefined);
+  assert.equal(seenRequestBodies[0].input[0].role, "user");
   assert.equal(json.choices[0].message.content, "Task-routed response");
 });
 
diff --git a/tests/unit/chatcore-target-format.test.ts b/tests/unit/chatcore-target-format.test.ts
index 4eb22d559881..b820b245fe58 100644
--- a/tests/unit/chatcore-target-format.test.ts
+++ b/tests/unit/chatcore-target-format.test.ts
@@ -115,6 +115,18 @@ test("#8994: customModelTargetFormat takes precedence over apiFormat='responses'
   assert.equal(r.targetFormat, "claude", "model-level targetFormat must win over apiFormat");
 });
 
+test("a declared connection alternate overrides the inbound Responses protocol", () => {
+  const r = resolveChatCoreTargetFormat({
+    provider: "deepseek",
+    resolvedModel: "deepseek-v4-pro",
+    apiFormat: "responses",
+    sourceFormat: FORMATS.OPENAI_RESPONSES,
+    customModelTargetFormat: undefined,
+    providerSpecificData: { targetFormat: FORMATS.CLAUDE },
+  });
+  assert.equal(r.targetFormat, FORMATS.CLAUDE);
+});
+
 test("unmapped provider → alias falls back to the provider id", () => {
   const r = resolveChatCoreTargetFormat({
     provider: "some-unmapped-provider",
diff --git a/tests/unit/chatcore-translation-paths.test.ts b/tests/unit/chatcore-translation-paths.test.ts
index 397f3f50d69e..c82d6987b23a 100644
--- a/tests/unit/chatcore-translation-paths.test.ts
+++ b/tests/unit/chatcore-translation-paths.test.ts
@@ -607,8 +607,10 @@ test("chatCore applies Responses input policy to openai-compatible targets", asy
 });
 
 test("chatCore replays no-tool reasoning across public Responses turns", async () => {
+  // Direct DeepSeek now speaks Responses upstream. Keep this regression on a
+  // Chat-compatible DeepSeek host so it continues to exercise the Responses-to-Chat replay path.
   saveModelsDevCapabilities({
-    deepseek: {
+    siliconflow: {
       "deepseek-v4-pro": {
         ...capabilityEntry(128_000),
         reasoning: true,
@@ -640,7 +642,7 @@ test("chatCore replays no-tool reasoning across public Responses turns", async (
     );
 
   const first = await invokeChatCore({
-    provider: "deepseek",
+    provider: "siliconflow",
     model: "deepseek-v4-pro",
     endpoint: "/v1/responses",
     body: {
@@ -656,7 +658,7 @@ test("chatCore replays no-tool reasoning across public Responses turns", async (
   assert.equal(first.result.success, true);
 
   const second = await invokeChatCore({
-    provider: "deepseek",
+    provider: "siliconflow",
     model: "deepseek-v4-pro",
     endpoint: "/v1/responses",
     body: {
@@ -687,7 +689,7 @@ test("chatCore replays no-tool reasoning across public Responses turns", async (
 });
 test("chatCore captures streaming no-tool reasoning for Responses replay", async () => {
   saveModelsDevCapabilities({
-    deepseek: {
+    siliconflow: {
       "deepseek-v4-pro": {
         ...capabilityEntry(128_000),
         reasoning: true,
@@ -730,7 +732,7 @@ test("chatCore captures streaming no-tool reasoning for Responses replay", async
     );
 
   const first = await invokeChatCore({
-    provider: "deepseek",
+    provider: "siliconflow",
     model: "deepseek-v4-pro",
     endpoint: "/v1/responses",
     body: {
@@ -748,7 +750,7 @@ test("chatCore captures streaming no-tool reasoning for Responses replay", async
   await flushAsyncSideEffects();
 
   const second = await invokeChatCore({
-    provider: "deepseek",
+    provider: "siliconflow",
     model: "deepseek-v4-pro",
     endpoint: "/v1/responses",
     body: {
diff --git a/tests/unit/executor-xai.test.ts b/tests/unit/executor-xai.test.ts
index 5d4d05fa7421..4668efd22edd 100644
--- a/tests/unit/executor-xai.test.ts
+++ b/tests/unit/executor-xai.test.ts
@@ -6,6 +6,7 @@ import { getExecutor, hasSpecializedExecutor } from "../../open-sse/executors/in
 import { xaiProvider } from "../../open-sse/config/providers/registry/xai/index.ts";
 
 // Real xai catalog ids (open-sse/config/providers/registry/xai/index.ts):
+//   grok-4.6                          — Responses-first flagship with vision + reasoning
 //   grok-4.3                          — plain, reasoning-capable
 //   grok-build-0.1                    — build/tool model, no reasoning mode
 //   grok-4.20-multi-agent-0309        — neutral (not in either allow/deny list)
@@ -28,6 +29,21 @@ test("XaiExecutor can target the separate xAI OAuth provider config", () => {
   assert.equal(executor.buildUrl("grok-4.5", false), "https://api.x.ai/v1/responses");
 });
 
+test("Grok 4.6 advertises its official capabilities and uses native Responses", () => {
+  const model = xaiProvider.models.find((entry) => entry.id === "grok-4.6");
+  assert.ok(model);
+  assert.equal(model.contextLength, 500000);
+  assert.equal(model.supportsVision, true);
+  assert.equal(model.supportsReasoning, true);
+  assert.equal(model.toolCalling, true);
+  assert.equal(model.supportsXHighEffort, true);
+  assert.deepEqual(model.supportedThinkingEfforts, ["low", "medium", "high", "xhigh"]);
+  assert.equal(model.targetFormat, "openai-responses");
+
+  const executor = new XaiExecutor();
+  assert.equal(executor.buildUrl("grok-4.6", true), "https://api.x.ai/v1/responses");
+});
+
 test("strips a -{level} suffix from an allow-listed model and sets reasoning_effort", () => {
   const executor = new XaiExecutor();
 
diff --git a/tests/unit/grok-cli-responses-compat.test.ts b/tests/unit/grok-cli-responses-compat.test.ts
index ad9888fe9417..3af78305b7ac 100644
--- a/tests/unit/grok-cli-responses-compat.test.ts
+++ b/tests/unit/grok-cli-responses-compat.test.ts
@@ -22,6 +22,12 @@ test("grok-cli exposes the authenticated grok-build model catalog", () => {
       targetFormat,
     })),
     [
+      {
+        id: "grok-4.6",
+        name: "Grok 4.6",
+        contextLength: 500000,
+        targetFormat: "openai-responses",
+      },
       {
         id: "grok-4.5",
         name: "Grok 4.5",
@@ -36,13 +42,15 @@ test("grok-cli exposes the authenticated grok-build model catalog", () => {
       },
     ]
   );
+  assert.equal(getModelTargetFormat("gc", "grok-4.6"), "openai-responses");
   assert.equal(getModelTargetFormat("gc", "grok-4.5"), "openai-responses");
   assert.equal(getModelTargetFormat("gc", "grok-composer-2.5-fast"), "openai-responses");
   assert.equal(grok_cliProvider.modelsUrl, GROK_BUILD_MODELS_URL);
 });
 
-test("grok-cli routes both models to the Responses endpoint", () => {
+test("grok-cli routes its catalog models to the Responses endpoint", () => {
   const executor = new GrokCliExecutor();
+  assert.equal(executor.buildUrl("grok-4.6", true), "https://cli-chat-proxy.grok.com/v1/responses");
   assert.equal(executor.buildUrl("grok-4.5", true), "https://cli-chat-proxy.grok.com/v1/responses");
   assert.equal(
     executor.buildUrl("grok-composer-2.5-fast", false),