diff --git a/packages/qvac-lib-infer-nmtcpp/CHANGELOG.md b/packages/qvac-lib-infer-nmtcpp/CHANGELOG.md
index 926842333b..29271e089e 100644
--- a/packages/qvac-lib-infer-nmtcpp/CHANGELOG.md
+++ b/packages/qvac-lib-infer-nmtcpp/CHANGELOG.md
@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [2.1.1] - 2026-05-04
+
+### Added
+
+- Exported `RuntimeStats` interface in `index.d.ts` with fields: `totalTokens`, `totalTime`, `decodeTime`, `TPS` (required), `encodeTime`, `TTFT` (optional — GGML backend only). Matches C++ backend output for SDK type-safety.
+
 ## [2.1.0] - 2026-04-22
 
 ### Added
diff --git a/packages/qvac-lib-infer-nmtcpp/README.md b/packages/qvac-lib-infer-nmtcpp/README.md
index c4b439f53d..0d6367be19 100644
--- a/packages/qvac-lib-infer-nmtcpp/README.md
+++ b/packages/qvac-lib-infer-nmtcpp/README.md
@@ -368,7 +368,7 @@ try {
 
   // Access performance statistics (if enabled with opts.stats)
   if (response.stats) {
-    console.log('Translation completed in:', response.stats.totalTime, 'ms')
+    console.log('Translation completed in:', response.stats.totalTime, 's')
   }
 } catch (error) {
   console.error('Translation failed:', error)
diff --git a/packages/qvac-lib-infer-nmtcpp/index.d.ts b/packages/qvac-lib-infer-nmtcpp/index.d.ts
index ba28e02daf..41e996a67b 100644
--- a/packages/qvac-lib-infer-nmtcpp/index.d.ts
+++ b/packages/qvac-lib-infer-nmtcpp/index.d.ts
@@ -93,6 +93,31 @@ export interface InferenceClientState {
   destroyed: boolean
 }
 
+/**
+ * Stats returned via `response.stats` when the addon is constructed with
+ * `opts.stats = true`. Field set differs by backend:
+ *
+ * - Bergamot emits: `totalTokens`, `totalTime`, `decodeTime`, `TPS`.
+ * - GGML/IndicTrans emits the above plus `encodeTime` and `TTFT`.
+ *
+ * Units:
+ * - `totalTime`, `encodeTime`, `decodeTime` — seconds (double).
+ * - `TTFT` (Time-To-First-Token) — milliseconds (double).
+ * - `TPS` (Tokens-Per-Second) — tokens / second (double).
+ * - `totalTokens` — integer count.
+ *
+ * Note: pivot translations may emit keys prefixed with the model name
+ * (e.g. `"BERGAMOT : ->TPS"`). This interface models the non-pivot shape.
+ */
+export interface RuntimeStats {
+  totalTokens: number
+  totalTime: number
+  decodeTime: number
+  TPS: number
+  encodeTime?: number
+  TTFT?: number
+}
+
 export default class TranslationNmtcpp {
   static readonly ModelTypes: TranslationNmtcppModelTypes
   constructor(args: TranslationNmtcppArgs)
diff --git a/packages/qvac-lib-infer-nmtcpp/package.json b/packages/qvac-lib-infer-nmtcpp/package.json
index e81914c57d..6415c84248 100644
--- a/packages/qvac-lib-infer-nmtcpp/package.json
+++ b/packages/qvac-lib-infer-nmtcpp/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@qvac/translation-nmtcpp",
-  "version": "2.1.0",
+  "version": "2.1.1",
   "description": "translation addon for qvac",
   "addon": true,
   "engines": {