diff --git a/src/api/providers/openai-native-codex.ts b/src/api/providers/openai-native-codex.ts
index 14769d9f66..d0ed986785 100644
--- a/src/api/providers/openai-native-codex.ts
+++ b/src/api/providers/openai-native-codex.ts
@@ -16,6 +16,7 @@ import { t } from "i18next"
 import {
 	type ModelInfo,
 	type ReasoningEffortWithMinimal,
+	type ServiceTier,
 	type VerbosityLevel,
 	openAiNativeCodexDefaultModelId,
 	openAiNativeCodexModels,
@@ -451,7 +452,10 @@ export class OpenAiNativeCodexHandler extends BaseProvider {
 								}
 								try {
 									const parsed = JSON.parse(data)
-									// service_tier ignored (not used)
+									// Persist tier when available (parity with openai-native)
+									if (parsed.response?.service_tier) {
+										;(this as any).lastServiceTier = parsed.response.service_tier as ServiceTier
+									}
 									// Minimal content extraction similar to OpenAI Responses
 									if (parsed?.type === "response.text.delta" && parsed?.delta) {
 										hasContent = true