Add prompt caching indicator to grok 3 (RooCodeInc#4139)

* Add prompt caching indicator to grok 3

* Create seven-insects-shop.md

Author: saoudrizwan

.changeset/seven-insects-shop.md

@@ -0,0 +1,5 @@
+---
+"claude-dev": patch
+---
+
+Add prompt caching indicator to grok 3

src/core/controller/models/refreshOpenRouterModels.ts

@@ -99,6 +99,11 @@ export async function refreshOpenRouterModels(
 						modelInfo.cacheWritesPrice = 0.14
 						modelInfo.cacheReadsPrice = 0.014
 						break
+					case "x-ai/grok-3-beta":
+						modelInfo.supportsPromptCache = true
+						modelInfo.cacheWritesPrice = 0
+						modelInfo.cacheReadsPrice = 0
+						break
 					default:
 						if (rawModel.id.startsWith("openai/")) {
 							modelInfo.cacheReadsPrice = parsePrice(rawModel.pricing?.input_cache_read)