diff --git a/codex-rs/otel/src/lib.rs b/codex-rs/otel/src/lib.rs
index cbedc4836..8a6d1f04f 100644
--- a/codex-rs/otel/src/lib.rs
+++ b/codex-rs/otel/src/lib.rs
@@ -197,13 +197,18 @@ impl OtelManager {
         if !self.metrics_use_metadata_tags {
             return Ok(Vec::new());
         }
-        let mut tags = Vec::with_capacity(5);
+        let mut tags = Vec::with_capacity(6);
         Self::push_metadata_tag(&mut tags, "auth_mode", self.metadata.auth_mode.as_deref())?;
         Self::push_metadata_tag(
             &mut tags,
             "session_source",
             Some(self.metadata.session_source.as_str()),
         )?;
+        Self::push_metadata_tag(
+            &mut tags,
+            "originator",
+            Some(self.metadata.originator.as_str()),
+        )?;
         Self::push_metadata_tag(&mut tags, "model", Some(self.metadata.model.as_str()))?;
         Self::push_metadata_tag(&mut tags, "app.version", Some(self.metadata.app_version))?;
         Ok(tags)
diff --git a/codex-rs/otel/src/traces/otel_manager.rs b/codex-rs/otel/src/traces/otel_manager.rs
index 8c0f5d295..f50eb5dfa 100644
--- a/codex-rs/otel/src/traces/otel_manager.rs
+++ b/codex-rs/otel/src/traces/otel_manager.rs
@@ -16,6 +16,7 @@ use crate::metrics::names::WEBSOCKET_EVENT_DURATION_METRIC;
 use crate::metrics::names::WEBSOCKET_REQUEST_COUNT_METRIC;
 use crate::metrics::names::WEBSOCKET_REQUEST_DURATION_METRIC;
 use crate::otel_provider::traceparent_context_from_env;
+use crate::sanitize_metric_tag_value;
 use chrono::SecondsFormat;
 use chrono::Utc;
 use codex_api::ApiError;
@@ -77,7 +78,7 @@ impl OtelManager {
                 auth_mode: auth_mode.map(|m| m.to_string()),
                 account_id,
                 account_email,
-                originator,
+                originator: sanitize_metric_tag_value(originator.as_str()),
                 session_source: session_source.to_string(),
                 model: model.to_owned(),
                 slug: slug.to_owned(),
diff --git a/codex-rs/otel/tests/suite/manager_metrics.rs b/codex-rs/otel/tests/suite/manager_metrics.rs
index 3dbc33441..1012a1b36 100644
--- a/codex-rs/otel/tests/suite/manager_metrics.rs
+++ b/codex-rs/otel/tests/suite/manager_metrics.rs
@@ -58,6 +58,7 @@ fn manager_attaches_metadata_tags_to_metrics() -> Result<()> {
             TelemetryAuthMode::ApiKey.to_string(),
         ),
         ("model".to_string(), "gpt-5.1".to_string()),
+        ("originator".to_string(), "test_originator".to_string()),
         ("service".to_string(), "codex-cli".to_string()),
         ("session_source".to_string(), "cli".to_string()),
         ("source".to_string(), "tui".to_string()),
diff --git a/codex-rs/otel/tests/suite/snapshot.rs b/codex-rs/otel/tests/suite/snapshot.rs
index 0c6ef7e91..e13775af6 100644
--- a/codex-rs/otel/tests/suite/snapshot.rs
+++ b/codex-rs/otel/tests/suite/snapshot.rs
@@ -113,6 +113,7 @@ fn manager_snapshot_metrics_collects_without_shutdown() -> Result<()> {
             TelemetryAuthMode::ApiKey.to_string(),
         ),
         ("model".to_string(), "gpt-5.1".to_string()),
+        ("originator".to_string(), "test_originator".to_string()),
         ("service".to_string(), "codex-cli".to_string()),
         ("session_source".to_string(), "cli".to_string()),
         ("success".to_string(), "true".to_string()),