diff --git a/codex-rs/exec/src/event_processor_with_human_output.rs b/codex-rs/exec/src/event_processor_with_human_output.rs
index cfdba98461..81f6ecc2ad 100644
--- a/codex-rs/exec/src/event_processor_with_human_output.rs
+++ b/codex-rs/exec/src/event_processor_with_human_output.rs
@@ -25,6 +25,7 @@ use codex_core::protocol::TaskCompleteEvent;
 use codex_core::protocol::TurnAbortReason;
 use codex_core::protocol::TurnDiffEvent;
 use codex_core::protocol::WebSearchBeginEvent;
+use codex_core::protocol::format_token_count;
 use owo_colors::OwoColorize;
 use owo_colors::Style;
 use shlex::try_join;
@@ -189,7 +190,8 @@ impl EventProcessor for EventProcessorWithHumanOutput {
                 return CodexStatus::InitiateShutdown;
             }
             EventMsg::TokenCount(token_usage) => {
-                ts_println!(self, "tokens used: {}", token_usage.blended_total());
+                let tokens = format_token_count(token_usage.blended_total());
+                ts_println!(self, "tokens used: {tokens}");
             }
             EventMsg::AgentMessageDelta(AgentMessageDeltaEvent { delta }) => {
                 if !self.answer_started {
diff --git a/codex-rs/protocol/src/protocol.rs b/codex-rs/protocol/src/protocol.rs
index 71c1538197..348e6af232 100644
--- a/codex-rs/protocol/src/protocol.rs
+++ b/codex-rs/protocol/src/protocol.rs
@@ -558,6 +558,17 @@ impl TokenUsage {
     }
 }
 
+/// Format a token count with thousands separators for readability.
+pub fn format_token_count(value: u64) -> String {
+    let mut s = value.to_string();
+    let mut i = s.len();
+    while i > 3 {
+        i -= 3;
+        s.insert(i, ',');
+    }
+    s
+}
+
 #[derive(Debug, Clone, Deserialize, Serialize)]
 pub struct FinalOutput {
     pub token_usage: TokenUsage,
@@ -572,21 +583,26 @@ impl From<TokenUsage> for FinalOutput {
 impl fmt::Display for FinalOutput {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         let token_usage = &self.token_usage;
+        let total = format_token_count(token_usage.blended_total());
+        let input = format_token_count(token_usage.non_cached_input());
+        let cached = token_usage.cached_input();
+        let cached_str = if cached > 0 {
+            let cached_tokens = format_token_count(cached);
+            format!(" (+ {cached_tokens} cached)")
+        } else {
+            String::new()
+        };
+        let output = format_token_count(token_usage.output_tokens);
+        let reasoning = token_usage
+            .reasoning_output_tokens
+            .map(|r| {
+                let reasoning_tokens = format_token_count(r);
+                format!(" (reasoning {reasoning_tokens})")
+            })
+            .unwrap_or_default();
         write!(
             f,
-            "Token usage: total={} input={}{} output={}{}",
-            token_usage.blended_total(),
-            token_usage.non_cached_input(),
-            if token_usage.cached_input() > 0 {
-                format!(" (+ {} cached)", token_usage.cached_input())
-            } else {
-                String::new()
-            },
-            token_usage.output_tokens,
-            token_usage
-                .reasoning_output_tokens
-                .map(|r| format!(" (reasoning {r})"))
-                .unwrap_or_default()
+            "Token usage: total={total} input={input}{cached_str} output={output}{reasoning}"
         )
     }
 }
diff --git a/codex-rs/tui/src/bottom_pane/chat_composer.rs b/codex-rs/tui/src/bottom_pane/chat_composer.rs
index 0d8a34a809..017302fadd 100644
--- a/codex-rs/tui/src/bottom_pane/chat_composer.rs
+++ b/codex-rs/tui/src/bottom_pane/chat_composer.rs
@@ -1,4 +1,5 @@
 use codex_core::protocol::TokenUsage;
+use codex_core::protocol::format_token_count;
 use crossterm::event::KeyCode;
 use crossterm::event::KeyEvent;
 use crossterm::event::KeyModifiers;
@@ -1153,8 +1154,9 @@ impl WidgetRef for &ChatComposer {
                 if let Some(token_usage_info) = &self.token_usage_info {
                     let token_usage = &token_usage_info.total_token_usage;
                     hint.push(Span::from("   "));
+                    let tokens = format_token_count(token_usage.blended_total());
                     hint.push(
-                        Span::from(format!("{} tokens used", token_usage.blended_total()))
+                        Span::from(format!("{tokens} tokens used"))
                             .style(Style::default().add_modifier(Modifier::DIM)),
                     );
                     let last_token_usage = &token_usage_info.last_token_usage;
diff --git a/codex-rs/tui/src/history_cell.rs b/codex-rs/tui/src/history_cell.rs
index 0b2af7a100..cdf3fb189b 100644
--- a/codex-rs/tui/src/history_cell.rs
+++ b/codex-rs/tui/src/history_cell.rs
@@ -18,6 +18,7 @@ use codex_core::protocol::McpInvocation;
 use codex_core::protocol::SandboxPolicy;
 use codex_core::protocol::SessionConfiguredEvent;
 use codex_core::protocol::TokenUsage;
+use codex_core::protocol::format_token_count;
 use codex_login::get_auth_file;
 use codex_login::try_read_auth_json;
 use codex_protocol::parse_command::ParsedCommand;
@@ -734,23 +735,24 @@ pub(crate) fn new_status_output(
     // Input: <input> [+ <cached> cached]
     let mut input_line_spans: Vec<Span<'static>> = vec![
         "  • Input: ".into(),
-        usage.non_cached_input().to_string().into(),
+        format_token_count(usage.non_cached_input()).into(),
     ];
     if let Some(cached) = usage.cached_input_tokens
         && cached > 0
     {
-        input_line_spans.push(format!(" (+ {cached} cached)").into());
+        let cached_tokens = format_token_count(cached);
+        input_line_spans.push(format!(" (+ {cached_tokens} cached)").into());
     }
     lines.push(Line::from(input_line_spans));
     // Output: <output>
     lines.push(Line::from(vec![
         "  • Output: ".into(),
-        usage.output_tokens.to_string().into(),
+        format_token_count(usage.output_tokens).into(),
     ]));
     // Total: <total>
     lines.push(Line::from(vec![
         "  • Total: ".into(),
-        usage.blended_total().to_string().into(),
+        format_token_count(usage.blended_total()).into(),
     ]));
 
     PlainHistoryCell { lines }