diff --git a/config/codex/config.toml b/config/codex/config.toml
index 5b1871c..949e0ce 100644
--- a/config/codex/config.toml
+++ b/config/codex/config.toml
@@ -4,7 +4,6 @@ personality = "pragmatic"
 suppress_unstable_features_warning = true
 web_search = "live"
 plan_mode_reasoning_effort = "xhigh"
-service_tier = "fast"
 
 [features]
 undo = true