Update prompt caching model check

Author: intitni

Tool/Sources/OpenAIService/APIs/ClaudeChatCompletionsService.swift

@@ -385,11 +385,11 @@ extension ClaudeChatCompletionsService.StreamDataChunk {
 extension ClaudeChatCompletionsService.RequestBody {
     init(_ body: ChatCompletionsRequestBody) {
         model = body.model
-        let supportsPromptCache = if model.hasPrefix("claude-3-5-sonnet")
-            || model.hasPrefix("claude-3-5-haiku")
-            || model.hasPrefix("claude-3-opus")
-            || model.hasPrefix("claude-3-haiku")
-        {
+        let prefixChecks = [
+            "claude-3-5-sonnet", "claude-3-5-haiku", "claude-3-opus", "claude-3-haiku",
+            "claude-3.5-sonnet", "claude-3.5-haiku",
+        ]
+        let supportsPromptCache = if prefixChecks.contains(where: model.hasPrefix) {
             true
         } else {
             false