diff --git a/OpenAI.SDK/Betalgo.Ranul.OpenAI.csproj b/OpenAI.SDK/Betalgo.Ranul.OpenAI.csproj
index e9d8706..40f85ca 100644
--- a/OpenAI.SDK/Betalgo.Ranul.OpenAI.csproj
+++ b/OpenAI.SDK/Betalgo.Ranul.OpenAI.csproj
@@ -70,7 +70,7 @@
 		<PackageReference Include="System.Net.Http.Json" Version="9.0.0" />
 	</ItemGroup>
 	<ItemGroup>
-		<PackageReference Include="Microsoft.Extensions.AI.Abstractions" Version="9.0.1-preview.1.24570.5" />
+		<PackageReference Include="Microsoft.Extensions.AI.Abstractions" Version="9.1.0-preview.1.25064.3" />
 		<PackageReference Include="System.ComponentModel.Annotations" Version="5.0.0" />
 	</ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/OpenAI.SDK/Managers/OpenAIChatClient.cs b/OpenAI.SDK/Managers/OpenAIChatClient.cs
index cd2d0f6..0f3cb0c 100644
--- a/OpenAI.SDK/Managers/OpenAIChatClient.cs
+++ b/OpenAI.SDK/Managers/OpenAIChatClient.cs
@@ -179,7 +179,7 @@ private ChatCompletionCreateRequest CreateRequest(IList<ChatMessage> chatMessage
                         JsonSchema = new()
                         {
                             Name = json.SchemaName ?? "JsonSchema",
-                            Schema = JsonSerializer.Deserialize<PropertyDefinition>(json.Schema),
+                            Schema = json.Schema.Value.Deserialize<PropertyDefinition>(),
                             Description = json.SchemaDescription
                         }
                     };
@@ -353,33 +353,27 @@ private static UsageDetails GetUsageDetails(UsageResponse usage)
 
         if (usage.PromptTokensDetails is { } promptDetails)
         {
-            Dictionary<string, object?> d = new(StringComparer.OrdinalIgnoreCase);
-            (details.AdditionalProperties ??= [])[nameof(usage.PromptTokensDetails)] = d;
-
             if (promptDetails.CachedTokens is int cachedTokens)
             {
-                d[nameof(promptDetails.CachedTokens)] = cachedTokens;
+                (details.AdditionalCounts ??= [])[$"{nameof(usage.PromptTokensDetails)}.{nameof(promptDetails.CachedTokens)}"] = cachedTokens;
             }
 
             if (promptDetails.AudioTokens is int audioTokens)
             {
-                d[nameof(promptDetails.AudioTokens)] = audioTokens;
+                (details.AdditionalCounts ??= [])[$"{nameof(usage.PromptTokensDetails)}.{nameof(promptDetails.AudioTokens)}"] = audioTokens;
             }
         }
 
         if (usage.CompletionTokensDetails is { } completionDetails)
         {
-            Dictionary<string, object?> d = new(StringComparer.OrdinalIgnoreCase);
-            (details.AdditionalProperties ??= [])[nameof(usage.CompletionTokensDetails)] = d;
-
             if (completionDetails.ReasoningTokens is int reasoningTokens)
             {
-                d[nameof(completionDetails.ReasoningTokens)] = reasoningTokens;
+                (details.AdditionalCounts ??= [])[$"{nameof(usage.CompletionTokensDetails)}.{nameof(completionDetails.ReasoningTokens)}"] = reasoningTokens;
             }
 
             if (completionDetails.AudioTokens is int audioTokens)
             {
-                d[nameof(promptDetails.AudioTokens)] = audioTokens;
+                (details.AdditionalCounts ??= [])[$"{nameof(usage.CompletionTokensDetails)}.{nameof(completionDetails.AudioTokens)}"] = audioTokens;
             }
         }