diff --git a/ui/src/lib/format.test.ts b/ui/src/lib/format.test.ts
index dcdeeef8e0c3..3a555f2e422c 100644
--- a/ui/src/lib/format.test.ts
+++ b/ui/src/lib/format.test.ts
@@ -7,6 +7,7 @@ import {
   formatDateTimeMs,
   formatDateMs,
   formatCompactTokenCount,
+  formatContextTokenCapacity,
   formatDurationCompact,
   formatDurationHuman,
   formatMs,
@@ -209,6 +210,7 @@ describe("formatCompactTokenCount", () => {
 
   it("formats millions with one decimal, trimming a trailing .0", () => {
     expect(formatCompactTokenCount(1_000_000)).toBe("1M");
+    expect(formatCompactTokenCount(1_050_000)).toBe("1.1M");
     expect(formatCompactTokenCount(1_500_000)).toBe("1.5M");
   });
 
@@ -235,6 +237,21 @@ describe("formatCompactTokenCount", () => {
   });
 });
 
+describe("formatContextTokenCapacity", () => {
+  it("truncates million-scale capacity to at most one decimal", () => {
+    expect(formatContextTokenCapacity(1_000_000)).toBe("1M");
+    expect(formatContextTokenCapacity(1_050_000)).toBe("1M");
+    expect(formatContextTokenCapacity(1_100_000)).toBe("1.1M");
+  });
+
+  it("preserves shared compact formatting below one million", () => {
+    expect(formatContextTokenCapacity(999)).toBe("999");
+    expect(formatContextTokenCapacity(1_000)).toBe("1k");
+    expect(formatContextTokenCapacity(32_768)).toBe("32.8k");
+    expect(formatContextTokenCapacity(999_999)).toBe("1M");
+  });
+});
+
 describe("formatTokens", () => {
   it("rolls a value that rounds up to 1000k over into the M branch", () => {
     expect(formatTokens(999_500)).toBe("1.0M");
diff --git a/ui/src/lib/format.ts b/ui/src/lib/format.ts
index c9649f1fd7a4..d11f5bf8621a 100644
--- a/ui/src/lib/format.ts
+++ b/ui/src/lib/format.ts
@@ -325,3 +325,10 @@ export function formatCompactTokenCount(
   }
   return String(tokens);
 }
+
+export function formatContextTokenCapacity(tokens: number): string {
+  if (tokens < 1_000_000) {
+    return formatCompactTokenCount(tokens);
+  }
+  return `${Math.floor(tokens / 100_000) / 10}M`;
+}
diff --git a/ui/src/pages/chat/chat-view.test.ts b/ui/src/pages/chat/chat-view.test.ts
index 317ae767de14..24d7c74df5ca 100644
--- a/ui/src/pages/chat/chat-view.test.ts
+++ b/ui/src/pages/chat/chat-view.test.ts
@@ -5106,7 +5106,7 @@ describe("chat model controls", () => {
     );
 
     expect(modelOption?.querySelector(".chat-controls__model-option-meta")?.textContent).toBe(
-      "1.1M context",
+      "1M context",
     );
     expect(modelOption?.closest("openclaw-tooltip")).toBeNull();
   });
diff --git a/ui/src/pages/chat/components/chat-model-controls.ts b/ui/src/pages/chat/components/chat-model-controls.ts
index 97f05564239b..7eaad164e06f 100644
--- a/ui/src/pages/chat/components/chat-model-controls.ts
+++ b/ui/src/pages/chat/components/chat-model-controls.ts
@@ -26,7 +26,7 @@ import {
   formatThinkingOverrideLabel,
   resolveChatThinkingSelectState,
 } from "../../../lib/chat/thinking.ts";
-import { formatCompactTokenCount } from "../../../lib/format.ts";
+import { formatContextTokenCapacity } from "../../../lib/format.ts";
 import { areUiSessionKeysEquivalent } from "../../../lib/sessions/session-key.ts";
 import { moveChatModelProviderFocus, selectChatModelProvider } from "./chat-model-provider-menu.ts";
 
@@ -658,7 +658,7 @@ function renderChatModelReasoningSelect(params: {
     const modelMeta = [
       entry.contextWindow
         ? t("chat.modelControls.contextWindow", {
-            count: formatCompactTokenCount(entry.contextWindow),
+            count: formatContextTokenCapacity(entry.contextWindow),
           })
         : "",
       entry.supportsTools === false ? t("chat.modelControls.chatOnly") : "",