diff --git a/codex-rs/otel/src/metrics/client.rs b/codex-rs/otel/src/metrics/client.rs
index d3c7e0d70991..ec90584e0a0c 100644
--- a/codex-rs/otel/src/metrics/client.rs
+++ b/codex-rs/otel/src/metrics/client.rs
@@ -46,8 +46,10 @@ const METER_NAME: &str = "codex";
 const MILLISECOND_DURATION_UNIT: &str = "ms";
 const MILLISECOND_DURATION_DESCRIPTION: &str = "Duration in milliseconds.";
 const MILLISECOND_DURATION_BOUNDARIES: &[f64] = &[
-    0.0, 5.0, 10.0, 25.0, 50.0, 75.0, 100.0, 250.0, 500.0, 750.0, 1000.0, 2500.0, 5000.0, 7500.0,
-    10000.0,
+    0.0, 5.0, 10.0, 25.0, 50.0, 75.0, 100.0, 250.0, 500.0, 750.0, 1_000.0, 1_250.0, 1_500.0,
+    1_750.0, 2_000.0, 2_250.0, 2_500.0, 3_000.0, 3_500.0, 4_000.0, 4_500.0, 5_000.0, 6_000.0,
+    7_000.0, 7_500.0, 8_000.0, 9_000.0, 10_000.0, 12_000.0, 15_000.0, 20_000.0, 30_000.0, 60_000.0,
+    120_000.0,
 ];
 const SECOND_DURATION_UNIT: &str = "s";
 const SECOND_DURATION_BOUNDARIES: &[f64] = &[