diff --git a/src/agents/tools/web-search.ts b/src/agents/tools/web-search.ts
index 4daff8ba58e..d6d1958e5d3 100644
--- a/src/agents/tools/web-search.ts
+++ b/src/agents/tools/web-search.ts
@@ -472,7 +472,11 @@ async function runWebSearch(params: {
   const cacheKey = normalizeCacheKey(
     params.provider === "brave"
       ? `${params.provider}:${params.query}:${params.count}:${params.country || "default"}:${params.search_lang || "default"}:${params.ui_lang || "default"}:${params.freshness || "default"}`
-      : `${params.provider}:${params.query}:${params.count}:${params.country || "default"}:${params.search_lang || "default"}:${params.ui_lang || "default"}`,
+      : params.provider === "perplexity"
+        ? `${params.provider}:${params.query}:${params.perplexityBaseUrl ?? DEFAULT_PERPLEXITY_BASE_URL}:${params.perplexityModel ?? DEFAULT_PERPLEXITY_MODEL}`
+        : params.provider === "grok"
+          ? `${params.provider}:${params.query}:${params.grokModel ?? DEFAULT_GROK_MODEL}:${params.grokInlineCitations ?? false}`
+          : `${params.provider}:${params.query}:${params.count}:${params.country || "default"}:${params.search_lang || "default"}:${params.ui_lang || "default"}`,
   );
   const cached = readCache(SEARCH_CACHE, cacheKey);
   if (cached) {