diff --git a/extensions/discord/src/monitor/native-command-ui.ts b/extensions/discord/src/monitor/native-command-ui.ts
index 314c31f11bf..4391bec9222 100644
--- a/extensions/discord/src/monitor/native-command-ui.ts
+++ b/extensions/discord/src/monitor/native-command-ui.ts
@@ -5,12 +5,14 @@ import {
   Row,
   StringSelectMenu,
   TextDisplay,
+  type AutocompleteInteraction,
   type ButtonInteraction,
   type CommandInteraction,
   type ComponentData,
   type StringSelectMenuInteraction,
 } from "@buape/carbon";
 import { ButtonStyle } from "discord-api-types/v10";
+import { resolveDefaultModelForAgent } from "openclaw/plugin-sdk/agent-runtime";
 import {
   buildCommandTextFromArgs,
   findCommandByNativeName,
@@ -218,7 +220,11 @@ function buildDiscordModelPickerNoticePayload(message: string): { components: Co
 }
 
 async function resolveDiscordModelPickerRoute(params: {
-  interaction: CommandInteraction | ButtonInteraction | StringSelectMenuInteraction;
+  interaction:
+    | CommandInteraction
+    | ButtonInteraction
+    | StringSelectMenuInteraction
+    | AutocompleteInteraction;
   cfg: ReturnType<typeof loadConfig>;
   accountId: string;
   threadBindings: ThreadBindingManager;
@@ -269,6 +275,48 @@ async function resolveDiscordModelPickerRoute(params: {
   });
 }
 
+export async function resolveDiscordNativeChoiceContext(params: {
+  interaction: AutocompleteInteraction;
+  cfg: ReturnType<typeof loadConfig>;
+  accountId: string;
+  threadBindings: ThreadBindingManager;
+}): Promise<{ provider?: string; model?: string } | null> {
+  try {
+    const route = await resolveDiscordModelPickerRoute({
+      interaction: params.interaction,
+      cfg: params.cfg,
+      accountId: params.accountId,
+      threadBindings: params.threadBindings,
+    });
+    const fallback = resolveDefaultModelForAgent({
+      cfg: params.cfg,
+      agentId: route.agentId,
+    });
+    const storePath = resolveStorePath(params.cfg.session?.store, {
+      agentId: route.agentId,
+    });
+    const sessionStore = loadSessionStore(storePath);
+    const sessionEntry = sessionStore[route.sessionKey];
+    const override = resolveStoredModelOverride({
+      sessionEntry,
+      sessionStore,
+      sessionKey: route.sessionKey,
+    });
+    if (!override?.model) {
+      return {
+        provider: fallback.provider,
+        model: fallback.model,
+      };
+    }
+    return {
+      provider: override.provider || fallback.provider,
+      model: override.model,
+    };
+  } catch {
+    return null;
+  }
+}
+
 function resolveDiscordModelPickerCurrentModel(params: {
   cfg: ReturnType<typeof loadConfig>;
   route: ResolvedAgentRoute;
diff --git a/extensions/discord/src/monitor/native-command.think-autocomplete.test.ts b/extensions/discord/src/monitor/native-command.think-autocomplete.test.ts
new file mode 100644
index 00000000000..2ec0aeb2d12
--- /dev/null
+++ b/extensions/discord/src/monitor/native-command.think-autocomplete.test.ts
@@ -0,0 +1,109 @@
+import { ChannelType, type AutocompleteInteraction } from "@buape/carbon";
+import { beforeEach, describe, expect, it, vi } from "vitest";
+import { listNativeCommandSpecs } from "../../../../src/auto-reply/commands-registry.js";
+import type { OpenClawConfig, loadConfig } from "../../../../src/config/config.js";
+import { createDiscordNativeCommand } from "./native-command.js";
+import { createNoopThreadBindingManager } from "./thread-bindings.js";
+
+const mocks = vi.hoisted(() => ({
+  resolveBoundConversationRoute: vi.fn(),
+  loadSessionStore: vi.fn(),
+  resolveStorePath: vi.fn(),
+}));
+
+vi.mock("./route-resolution.js", () => ({
+  resolveDiscordBoundConversationRoute: mocks.resolveBoundConversationRoute,
+  resolveDiscordEffectiveRoute: vi.fn(),
+}));
+
+vi.mock("../../../../src/config/sessions.js", async (importOriginal) => {
+  const actual = await importOriginal<typeof import("../../../../src/config/sessions.js")>();
+  return {
+    ...actual,
+    loadSessionStore: mocks.loadSessionStore,
+    resolveStorePath: mocks.resolveStorePath,
+  };
+});
+
+describe("discord native /think autocomplete", () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+    mocks.resolveBoundConversationRoute.mockResolvedValue({
+      agentId: "main",
+      sessionKey: "discord:session:1",
+    });
+    mocks.resolveStorePath.mockReturnValue("/tmp/openclaw-sessions.mock.json");
+    mocks.loadSessionStore.mockReturnValue({
+      "discord:session:1": {
+        providerOverride: "openai-codex",
+        modelOverride: "gpt-5.4",
+      },
+    });
+  });
+
+  it("uses bound session model override for /think choices", async () => {
+    const spec = listNativeCommandSpecs({ provider: "discord" }).find(
+      (entry) => entry.name === "think",
+    );
+    expect(spec).toBeTruthy();
+    if (!spec) {
+      return;
+    }
+
+    const cfg = {
+      agents: {
+        defaults: {
+          model: {
+            primary: "anthropic/claude-sonnet-4.5",
+          },
+        },
+      },
+    } as ReturnType<typeof loadConfig>;
+    const discordConfig = {} as NonNullable<OpenClawConfig["channels"]>["discord"];
+    const command = createDiscordNativeCommand({
+      command: spec,
+      cfg,
+      discordConfig,
+      accountId: "default",
+      sessionPrefix: "discord:slash",
+      ephemeralDefault: true,
+      threadBindings: createNoopThreadBindingManager("default"),
+    });
+
+    const levelOption = command.options?.find((entry) => entry.name === "level") as
+      | {
+          autocomplete?: (
+            interaction: AutocompleteInteraction & {
+              respond: (choices: Array<{ name: string; value: string }>) => Promise<void>;
+            },
+          ) => Promise<void>;
+        }
+      | undefined;
+    expect(typeof levelOption?.autocomplete).toBe("function");
+    if (typeof levelOption?.autocomplete !== "function") {
+      return;
+    }
+
+    const respond = vi.fn(async (_choices: Array<{ name: string; value: string }>) => {});
+    const interaction = {
+      options: {
+        getFocused: () => ({ value: "xh" }),
+      },
+      respond,
+      rawData: {},
+      channel: { id: "D1", type: ChannelType.DM },
+      user: { id: "U1" },
+      guild: undefined,
+      client: {},
+    } as unknown as AutocompleteInteraction & {
+      respond: (choices: Array<{ name: string; value: string }>) => Promise<void>;
+    };
+
+    await levelOption.autocomplete(interaction);
+
+    expect(respond).toHaveBeenCalledTimes(1);
+    const choices = respond.mock.calls[0]?.[0] ?? [];
+    const values = choices.map((choice) => choice.value);
+    expect(values).toContain("xhigh");
+  });
+});
diff --git a/extensions/discord/src/monitor/native-command.ts b/extensions/discord/src/monitor/native-command.ts
index d00fab280f0..5c15a1b9e50 100644
--- a/extensions/discord/src/monitor/native-command.ts
+++ b/extensions/discord/src/monitor/native-command.ts
@@ -73,6 +73,7 @@ import {
   createDiscordModelPickerFallbackButton as createDiscordModelPickerFallbackButtonUi,
   createDiscordModelPickerFallbackSelect as createDiscordModelPickerFallbackSelectUi,
   replyWithDiscordModelPickerProviders,
+  resolveDiscordNativeChoiceContext,
   shouldOpenDiscordModelPickerFromCommand,
   type DiscordCommandArgContext,
   type DiscordModelPickerContext,
@@ -124,8 +125,11 @@ function resolveDiscordNativeCommandAllowlistAccess(params: {
 function buildDiscordCommandOptions(params: {
   command: ChatCommandDefinition;
   cfg: ReturnType<typeof loadConfig>;
+  resolveChoiceContext?: (
+    interaction: AutocompleteInteraction,
+  ) => Promise<{ provider?: string; model?: string } | null>;
 }): CommandOptions | undefined {
-  const { command, cfg } = params;
+  const { command, cfg, resolveChoiceContext } = params;
   const args = command.args;
   if (!args || args.length === 0) {
     return undefined;
@@ -158,7 +162,17 @@ function buildDiscordCommandOptions(params: {
           const focused = interaction.options.getFocused();
           const focusValue =
             typeof focused?.value === "string" ? focused.value.trim().toLowerCase() : "";
-          const choices = resolveCommandArgChoices({ command, arg, cfg });
+          const context =
+            typeof arg.choices === "function" && resolveChoiceContext
+              ? await resolveChoiceContext(interaction)
+              : null;
+          const choices = resolveCommandArgChoices({
+            command,
+            arg,
+            cfg,
+            provider: context?.provider,
+            model: context?.model,
+          });
           const filtered = focusValue
             ? choices.filter((choice) => choice.label.toLowerCase().includes(focusValue))
             : choices;
@@ -297,6 +311,13 @@ export function createDiscordNativeCommand(params: {
   const commandOptions = buildDiscordCommandOptions({
     command: commandDefinition,
     cfg,
+    resolveChoiceContext: async (interaction) =>
+      resolveDiscordNativeChoiceContext({
+        interaction,
+        cfg,
+        accountId,
+        threadBindings,
+      }),
   });
   const options = commandOptions
     ? (commandOptions satisfies CommandOptions)