diff --git a/dist/index.js b/dist/index.js
index 45a104f2e0775761858eac2a82ced64bceba1f5e..36861246fa3aea50f82a233aec8c8edaef0ff6e3 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -57,13 +57,14 @@ function convertGroqUsage(usage) {
   }
   const promptTokens = (_a = usage.prompt_tokens) != null ? _a : 0;
   const completionTokens = (_b = usage.completion_tokens) != null ? _b : 0;
-  const reasoningTokens = (_d = (_c = usage.completion_tokens_details) == null ? void 0 : _c.reasoning_tokens) != null ? _d : void 0;
+  const cacheReadTokens = (_d = (_c = usage.prompt_tokens_details) == null ? void 0 : _c.cached_tokens) != null ? _d : 0;
+  const reasoningTokens = usage.completion_tokens_details?.reasoning_tokens ?? void 0;
   const textTokens = reasoningTokens != null ? completionTokens - reasoningTokens : completionTokens;
   return {
     inputTokens: {
       total: promptTokens,
-      noCache: promptTokens,
-      cacheRead: void 0,
+      noCache: Math.max(0, promptTokens - cacheReadTokens),
+      cacheRead: cacheReadTokens || void 0,
       cacheWrite: void 0
     },
     outputTokens: {
diff --git a/dist/index.mjs b/dist/index.mjs
index c644c32235d8fa88c51c0fc6958feb1da4877c96..6aa35dd173cd67dbdd2f6f3a5fe2d901cbaafae8 100644
--- a/dist/index.mjs
+++ b/dist/index.mjs
@@ -44,13 +44,14 @@ function convertGroqUsage(usage) {
   }
   const promptTokens = (_a = usage.prompt_tokens) != null ? _a : 0;
   const completionTokens = (_b = usage.completion_tokens) != null ? _b : 0;
-  const reasoningTokens = (_d = (_c = usage.completion_tokens_details) == null ? void 0 : _c.reasoning_tokens) != null ? _d : void 0;
+  const cacheReadTokens = (_d = (_c = usage.prompt_tokens_details) == null ? void 0 : _c.cached_tokens) != null ? _d : 0;
+  const reasoningTokens = usage.completion_tokens_details?.reasoning_tokens ?? void 0;
   const textTokens = reasoningTokens != null ? completionTokens - reasoningTokens : completionTokens;
   return {
     inputTokens: {
       total: promptTokens,
-      noCache: promptTokens,
-      cacheRead: void 0,
+      noCache: Math.max(0, promptTokens - cacheReadTokens),
+      cacheRead: cacheReadTokens || void 0,
       cacheWrite: void 0
     },
     outputTokens: {
diff --git a/src/convert-groq-usage.ts b/src/convert-groq-usage.ts
index a16809223b068bc1d682ef9156ccc82ce89ace5c..732b14508609106bd5946ba9f9323c7863ee2da5 100644
--- a/src/convert-groq-usage.ts
+++ b/src/convert-groq-usage.ts
@@ -40,6 +40,7 @@ export function convertGroqUsage(
 
   const promptTokens = usage.prompt_tokens ?? 0;
   const completionTokens = usage.completion_tokens ?? 0;
+  const cacheReadTokens = usage.prompt_tokens_details?.cached_tokens ?? 0;
   const reasoningTokens =
     usage.completion_tokens_details?.reasoning_tokens ?? undefined;
   const textTokens =
@@ -50,8 +51,8 @@ export function convertGroqUsage(
   return {
     inputTokens: {
       total: promptTokens,
-      noCache: promptTokens,
-      cacheRead: undefined,
+      noCache: Math.max(0, promptTokens - cacheReadTokens),
+      cacheRead: cacheReadTokens || undefined,
       cacheWrite: undefined,
     },
     outputTokens: {