diff --git a/src/cli/render/stream-progress.test.ts b/src/cli/render/stream-progress.test.ts
index 249ca4e6..c23a5e90 100644
--- a/src/cli/render/stream-progress.test.ts
+++ b/src/cli/render/stream-progress.test.ts
@@ -59,6 +59,36 @@ describe('streamProgress', () => {
     expect(result).toContain('42 tokens');
   });
 
+  it('uses .toFixed(1) just below the 10k boundary', () => {
+    const result = stripAnsi(
+      streamProgress({ label: 'test', spinnerFrame: 0, elapsedMs: 1000, tokenCount: 9999 }),
+    );
+    expect(result).toContain('10.0k tokens');
+  });
+
+  it('uses Math.round at exactly the 10k boundary', () => {
+    const result = stripAnsi(
+      streamProgress({ label: 'test', spinnerFrame: 0, elapsedMs: 1000, tokenCount: 10000 }),
+    );
+    expect(result).toContain('10k tokens');
+    expect(result).not.toContain('10.0k');
+  });
+
+  it('renders 99999 as "100k tokens" not "100.0k tokens"', () => {
+    const result = stripAnsi(
+      streamProgress({ label: 'test', spinnerFrame: 0, elapsedMs: 1000, tokenCount: 99999 }),
+    );
+    expect(result).toContain('100k tokens');
+    expect(result).not.toContain('100.0k');
+  });
+
+  it('renders 100000 as "100k tokens"', () => {
+    const result = stripAnsi(
+      streamProgress({ label: 'test', spinnerFrame: 0, elapsedMs: 1000, tokenCount: 100000 }),
+    );
+    expect(result).toContain('100k tokens');
+  });
+
   it('renders M suffix for large counts', () => {
     const result = stripAnsi(
       streamProgress({
diff --git a/src/cli/render/stream-progress.ts b/src/cli/render/stream-progress.ts
index 2d03fce0..9beab5e8 100644
--- a/src/cli/render/stream-progress.ts
+++ b/src/cli/render/stream-progress.ts
@@ -63,7 +63,7 @@ export interface StreamProgressSpec {
 /** Format token count with k/M suffixes. */
 function formatTokenCount(tokens: number): string {
   if (tokens < 1000) return `${tokens} tokens`;
-  if (tokens < 100_000) return `${(tokens / 1000).toFixed(1)}k tokens`;
+  if (tokens < 10_000) return `${(tokens / 1000).toFixed(1)}k tokens`;
   if (tokens < 1_000_000) return `${Math.round(tokens / 1000)}k tokens`;
   return `${(tokens / 1_000_000).toFixed(1)}M tokens`;
 }