diff --git a/src/libs/Directory.Build.props b/src/libs/Directory.Build.props
index cd18603f..d1e85975 100755
--- a/src/libs/Directory.Build.props
+++ b/src/libs/Directory.Build.props
@@ -16,7 +16,7 @@
   </ItemGroup>
   
   <PropertyGroup Label="Nuget">
-    <Version>2.0.0-alpha.2</Version>
+    <Version>2.0.0-alpha.3</Version>
     <GeneratePackageOnBuild Condition=" '$(Configuration)' == 'Release' ">true</GeneratePackageOnBuild>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <Authors>tryAGI and contributors</Authors>
diff --git a/src/libs/OpenAI.Constants/Chat/ChatModel.cs b/src/libs/OpenAI.Constants/Chat/ChatModel.cs
index d16b66db..292e3398 100644
--- a/src/libs/OpenAI.Constants/Chat/ChatModel.cs
+++ b/src/libs/OpenAI.Constants/Chat/ChatModel.cs
@@ -13,40 +13,46 @@ namespace OpenAI.Constants;
 /// </summary>
 public readonly record struct ChatModel(string Value)
 {
-    /// <summary>
-    /// More capable than any GPT-3.5 model, able to do more complex tasks, and optimized for chat. <br/>
-    /// Will be updated with our latest model iteration 2 weeks after it is released. <br/>
-    /// Max tokens: 8,192 tokens <br/>
-    /// Training data: Up to Sep 2021 <br/>
-    /// <remarks>On June 27th, 2023, gpt-4 will be updated to point from gpt-4-0314 to gpt-4-0613, the latest model iteration.</remarks>
-    /// </summary>
+    /// <inheritdoc cref="Gpt4_0613Value"/>
+    /// <remarks>Currently points to gpt-4-0613.</remarks>
     internal const string Gpt4Value = "gpt-4";
     
     /// <summary>
-    /// Snapshot of gpt-4 from June 13th 2023 with function calling data. <br/>
-    /// Unlike gpt-4, this model will not receive updates, and will be deprecated 3 months after a new version is released. <br/>
+    /// Snapshot of gpt-4 from June 13th 2023 with improved function calling support. <br/>
+    /// According https://platform.openai.com/docs/models/gpt-4-and-gpt-4-turbo <br/>
     /// Max tokens: 8,192 tokens <br/>
     /// Training data: Up to Sep 2021 <br/>
     /// </summary>
     internal const string Gpt4_0613Value = "gpt-4-0613";
     
-    /// <summary>
-    /// Same capabilities as the base gpt-4 mode but with 4x the context length. <br/>
-    /// Will be updated with our latest model iteration. <br/>
-    /// Max tokens: 32,768 tokens <br/>
-    /// Training data: Up to Sep 2021 <br/>
-    /// <remarks>On June 27th, 2023, gpt-4 will be updated to point from gpt-4-0314 to gpt-4-0613, the latest model iteration.</remarks>
-    /// </summary>
+    /// <inheritdoc cref="Gpt4_32k_0613Value"/>
+    /// <remarks>Currently points to gpt-4-32k-0613</remarks>
     internal const string Gpt4_32kValue = "gpt-4-32";
     
     /// <summary>
-    /// Snapshot of gpt-4-32 from June 13th 2023. <br/>
-    /// Unlike gpt-4-32k, this model will not receive updates, and will be deprecated 3 months after a new version is released. <br/>
+    /// Snapshot of gpt-4-32k from June 13th 2023 with improved function calling support. <br/>
+    /// According https://platform.openai.com/docs/models/gpt-4-and-gpt-4-turbo <br/>
     /// Max tokens: 32,768 tokens <br/>
     /// Training data: Up to Sep 2021 <br/>
     /// </summary>
     internal const string Gpt4_32k_0613Value = "gpt-4-32k-0613";
     
+    /// <summary>
+    /// The latest GPT-4 model with improved instruction following, JSON mode, reproducible outputs, parallel function calling, and more. Returns a maximum of 4,096 output tokens. This preview model is not yet suited for production traffic. <br/>
+    /// According https://platform.openai.com/docs/models/gpt-4-and-gpt-4-turbo <br/>
+    /// Max tokens: 128,000 tokens <br/>
+    /// Training data: Up to Apr 2023 <br/>
+    /// </summary>
+    internal const string Gpt4_1106_PreviewValue = "gpt-4-1106-preview";
+    
+    /// <summary>
+    /// Ability to understand images, in addition to all other GPT-4 Turbo capabilties. Returns a maximum of 4,096 output tokens. This is a preview model version and not suited yet for production traffic. <br/>
+    /// According https://platform.openai.com/docs/models/gpt-4-and-gpt-4-turbo <br/>
+    /// Max tokens: 128,000 tokens <br/>
+    /// Training data: Up to Apr 2023 <br/>
+    /// </summary>
+    internal const string Gpt4VisionPreviewValue = "gpt-4-vision-preview";
+    
     /// <summary>
     /// Most capable GPT-3.5 model and optimized for chat at 1/10th the cost of text-davinci-003. <br/>
     /// Will be updated with our latest model iteration 2 weeks after it is released. <br/>
@@ -91,6 +97,12 @@ public readonly record struct ChatModel(string Value)
     /// <inheritdoc cref="Gpt4_32k_0613Value"/>
     public static ChatModel Gpt4_32k_0613 { get; } = new(Gpt4_32k_0613Value);
     
+    /// <inheritdoc cref="Gpt4_1106_PreviewValue"/>
+    public static ChatModel Gpt4_1106_Preview { get; } = new(Gpt4_1106_PreviewValue);
+    
+    /// <inheritdoc cref="Gpt4VisionPreviewValue"/>
+    public static ChatModel Gpt4VisionPreview { get; } = new(Gpt4VisionPreviewValue);
+    
     /// <inheritdoc cref="Gpt35TurboValue"/>
     public static ChatModel Gpt35Turbo { get; } = new(Gpt35TurboValue);
     
diff --git a/src/libs/OpenAI.Constants/Chat/ChatPrices.cs b/src/libs/OpenAI.Constants/Chat/ChatPrices.cs
index 2f61909a..7dd2eb2f 100644
--- a/src/libs/OpenAI.Constants/Chat/ChatPrices.cs
+++ b/src/libs/OpenAI.Constants/Chat/ChatPrices.cs
@@ -8,16 +8,16 @@ public static class ChatPrices
 {
     /// <inheritdoc cref="ChatPrices"/>
     /// <param name="model"></param>
-    /// <param name="completionTokens"></param>
-    /// <param name="promptTokens"></param>
+    /// <param name="outputTokens"></param>
+    /// <param name="inputTokens"></param>
     /// <returns></returns>
     /// <exception cref="NotImplementedException"></exception>
     public static double? TryGet(
         ChatModel model,
-        int completionTokens,
-        int promptTokens)
+        int outputTokens,
+        int inputTokens)
     {
-        var (promptPricePerToken, completionPricePerToken) = model.Value switch
+        var (inputPricePerToken, outputPricePerToken) = model.Value switch
         {
             ChatModel.Gpt4Value => (0.03 * 0.001, 0.06 * 0.001),
             ChatModel.Gpt4_0613Value => (0.03 * 0.001, 0.06 * 0.001),
@@ -25,6 +25,9 @@ public static class ChatPrices
             ChatModel.Gpt4_32kValue => (0.06 * 0.001, 0.12 * 0.001),
             ChatModel.Gpt4_32k_0613Value => (0.06 * 0.001, 0.12 * 0.001),
             
+            ChatModel.Gpt4_1106_PreviewValue => (0.01 * 0.001, 0.03 * 0.001),
+            ChatModel.Gpt4VisionPreviewValue => (0.01 * 0.001, 0.03 * 0.001),
+            
             ChatModel.Gpt35TurboValue => (0.0015 * 0.001, 0.002 * 0.001),
             ChatModel.Gpt35Turbo_0613Value => (0.0015 * 0.001, 0.002 * 0.001),
             
@@ -33,25 +36,25 @@ public static class ChatPrices
             
             _ => (-1.0, -1.0)
         };
-        if (promptPricePerToken < 0.0)
+        if (inputPricePerToken < 0.0)
         {
             return null;
         }
         
-        return completionTokens * completionPricePerToken +
-               promptTokens * promptPricePerToken;
+        return outputTokens * outputPricePerToken +
+               inputTokens * inputPricePerToken;
     }
     
     /// <inheritdoc cref="TryGet(ChatModel, int, int)"/>
     public static double Get(
         ChatModel model,
-        int completionTokens,
-        int promptTokens)
+        int outputTokens,
+        int inputTokens)
     {
         return TryGet(
                    model: model,
-                   completionTokens: completionTokens,
-                   promptTokens: promptTokens) ??
+                   outputTokens: outputTokens,
+                   inputTokens: inputTokens) ??
                throw new NotImplementedException();
     }
 }
\ No newline at end of file
diff --git a/src/libs/OpenAI.Constants/Context/ContextLengths.cs b/src/libs/OpenAI.Constants/Context/ContextLengths.cs
index eec0f66b..9c338c6f 100644
--- a/src/libs/OpenAI.Constants/Context/ContextLengths.cs
+++ b/src/libs/OpenAI.Constants/Context/ContextLengths.cs
@@ -23,6 +23,9 @@ public static class ContextLengths
             ChatModel.Gpt4_32kValue => 32_768,
             ChatModel.Gpt4_32k_0613Value => 32_768,
             
+            ChatModel.Gpt4_1106_PreviewValue => 128_000,
+            ChatModel.Gpt4VisionPreviewValue => 128_000,
+            
             ChatModel.Gpt35TurboValue => 4_096,
             ChatModel.Gpt35Turbo_0613Value => 4_096,
             
diff --git a/src/libs/OpenAI.Constants/Embedding/EmbeddingPrices.cs b/src/libs/OpenAI.Constants/Embedding/EmbeddingPrices.cs
index c4377f0d..9b0e6bc4 100644
--- a/src/libs/OpenAI.Constants/Embedding/EmbeddingPrices.cs
+++ b/src/libs/OpenAI.Constants/Embedding/EmbeddingPrices.cs
@@ -3,46 +3,41 @@ namespace OpenAI.Constants;
 /// <summary>
 /// All prices in USD. <br/>
 /// According https://openai.com/pricing/ <br/>
-/// According https://platform.openai.com/docs/guides/embeddings/embedding-models &lt;br/&gt;
+/// According https://platform.openai.com/docs/guides/embeddings/embedding-models <br/>
 /// </summary>
 public static class EmbeddingPrices
 {
     /// <inheritdoc cref="EmbeddingPrices"/>
     /// <param name="model"></param>
-    /// <param name="completionTokens"></param>
-    /// <param name="promptTokens"></param>
+    /// <param name="tokens"></param>
     /// <returns></returns>
     /// <exception cref="NotImplementedException"></exception>
     public static double? TryGet(
         EmbeddingModel model,
-        int completionTokens,
-        int promptTokens)
+        int tokens)
     {
-        var (promptPricePerToken, completionPricePerToken) = model.Value switch
+        var pricePerToken = model.Value switch
         {
-            EmbeddingModel.Ada002Value => (0.0001 * 0.001, 0.0),
+            EmbeddingModel.Ada002Value => 0.0001 * 0.001,
             
-            _ => (-1.0, -1.0)
+            _ => -1.0,
         };
-        if (promptPricePerToken < 0.0)
+        if (pricePerToken < 0.0)
         {
             return null;
         }
         
-        return completionTokens * completionPricePerToken +
-               promptTokens * promptPricePerToken;
+        return tokens * pricePerToken;
     }
     
-    /// <inheritdoc cref="TryGet(EmbeddingModel, int, int)"/>
+    /// <inheritdoc cref="TryGet(EmbeddingModel, int)"/>
     public static double Get(
         EmbeddingModel model,
-        int completionTokens,
-        int promptTokens)
+        int tokens)
     {
         return TryGet(
                    model: model,
-                   completionTokens: completionTokens,
-                   promptTokens: promptTokens) ??
+                   tokens: tokens) ??
                throw new NotImplementedException();
     }
 }
\ No newline at end of file
diff --git a/src/libs/OpenAI.Constants/FineTuning/FineTuningPrices.cs b/src/libs/OpenAI.Constants/FineTuning/FineTuningPrices.cs
new file mode 100644
index 00000000..f3000e47
--- /dev/null
+++ b/src/libs/OpenAI.Constants/FineTuning/FineTuningPrices.cs
@@ -0,0 +1,52 @@
+namespace OpenAI.Constants;
+
+/// <summary>
+/// All prices in USD. <br/>
+/// According https://openai.com/pricing/ <br/>
+/// </summary>
+public static class FineTuningPrices
+{
+    /// <inheritdoc cref="FineTuningPrices"/>
+    /// <param name="model"></param>
+    /// <param name="trainingTokens"></param>
+    /// <param name="inputTokens"></param>
+    /// <param name="outputTokens"></param>
+    /// <returns></returns>
+    /// <exception cref="NotImplementedException"></exception>
+    public static double? TryGet(
+        ChatModel model,
+        int trainingTokens,
+        int inputTokens,
+        int outputTokens)
+    {
+        var (trainingPricePerToken, inputPricePerToken, outputPricePerToken) = model.Value switch
+        {
+            ChatModel.Gpt35TurboValue => (0.0080 * 0.001, 0.0030 * 0.001, 0.0060 * 0.001),
+            
+            _ => (-1.0, -1.0, -1.0),
+        };
+        if (trainingPricePerToken < 0.0)
+        {
+            return null;
+        }
+        
+        return trainingTokens * trainingPricePerToken +
+               inputTokens * inputPricePerToken +
+               outputTokens * outputPricePerToken;
+    }
+    
+    /// <inheritdoc cref="TryGet(ChatModel, int, int, int)"/>
+    public static double Get(
+        ChatModel model,
+        int trainingTokens,
+        int inputTokens,
+        int outputTokens)
+    {
+        return TryGet(
+                   model: model,
+                   trainingTokens: trainingTokens,
+                   inputTokens: inputTokens,
+                   outputTokens: outputTokens) ??
+               throw new NotImplementedException();
+    }
+}
\ No newline at end of file
diff --git a/src/libs/OpenAI.Constants/OpenAI.Constants.csproj b/src/libs/OpenAI.Constants/OpenAI.Constants.csproj
index 49caa4fd..e0aa60cc 100644
--- a/src/libs/OpenAI.Constants/OpenAI.Constants.csproj
+++ b/src/libs/OpenAI.Constants/OpenAI.Constants.csproj
@@ -7,8 +7,11 @@
   <PropertyGroup Label="Nuget">
     <Description>Static classes that provide actual constants(models/context lengts/prices) for the OpenAI API.
       Available types in OpenAI.Constants namespace:
-      - AudioModel
-      - AudioPrices
+      - SpeechToTextModel
+      - SpeechToTextPrices
+      - TextToSpeechModel
+      - TextToSpeechPrices
+      - FineTuningPrices
       - ChatModel
       - ChatPrices
       - EmbeddingModel
diff --git a/src/libs/OpenAI.Constants/Audio/AudioModel.cs b/src/libs/OpenAI.Constants/SpeechToText/SpeechToTextModel.cs
similarity index 71%
rename from src/libs/OpenAI.Constants/Audio/AudioModel.cs
rename to src/libs/OpenAI.Constants/SpeechToText/SpeechToTextModel.cs
index efb6ae51..8cbe3d1e 100644
--- a/src/libs/OpenAI.Constants/Audio/AudioModel.cs
+++ b/src/libs/OpenAI.Constants/SpeechToText/SpeechToTextModel.cs
@@ -3,7 +3,7 @@ namespace OpenAI.Constants;
 /// <summary>
 /// According https://platform.openai.com/docs/guides/speech-to-text
 /// </summary>
-public readonly record struct AudioModel(string Value)
+public readonly record struct SpeechToTextModel(string Value)
 {
     /// <summary>
     /// Transcribe audio into whatever language the audio is in. <br/>
@@ -12,7 +12,7 @@ public readonly record struct AudioModel(string Value)
     internal const string Whisper1Value = "whisper-1";
     
     /// <inheritdoc cref="Whisper1Value"/>
-    public static AudioModel Whisper1 { get; } = new(Whisper1Value);
+    public static SpeechToTextModel Whisper1 { get; } = new(Whisper1Value);
 
     /// <inheritdoc/>
     public override string ToString()
@@ -21,11 +21,11 @@ public override string ToString()
     }
 
     /// <summary>
-    /// Implicitly converts <see cref="AudioModel"/> to <see cref="string"/>.
+    /// Implicitly converts <see cref="SpeechToTextModel"/> to <see cref="string"/>.
     /// </summary>
     /// <param name="model"></param>
     /// <returns></returns>
-    public static implicit operator string(AudioModel model)
+    public static implicit operator string(SpeechToTextModel model)
     {
         return model.Value;
     }
diff --git a/src/libs/OpenAI.Constants/Audio/AudioPrices.cs b/src/libs/OpenAI.Constants/SpeechToText/SpeechToTextModelPrices.cs
similarity index 83%
rename from src/libs/OpenAI.Constants/Audio/AudioPrices.cs
rename to src/libs/OpenAI.Constants/SpeechToText/SpeechToTextModelPrices.cs
index 121cf1ba..af64b352 100644
--- a/src/libs/OpenAI.Constants/Audio/AudioPrices.cs
+++ b/src/libs/OpenAI.Constants/SpeechToText/SpeechToTextModelPrices.cs
@@ -12,12 +12,12 @@ public static class AudioPrices
     /// <returns></returns>
     /// <exception cref="NotImplementedException"></exception>
     public static double? TryGet(
-        AudioModel model,
+        SpeechToTextModel model,
         int seconds)
     {
         var pricePerMinute = model.Value switch
         {
-            AudioModel.Whisper1Value => 0.006,
+            SpeechToTextModel.Whisper1Value => 0.006,
             
             _ => -1.0,
         };
@@ -29,9 +29,9 @@ public static class AudioPrices
         return seconds * pricePerMinute / 60.0;
     }
     
-    /// <inheritdoc cref="TryGet(AudioModel, int)"/>
+    /// <inheritdoc cref="TryGet(SpeechToTextModel, int)"/>
     public static double Get(
-        AudioModel model,
+        SpeechToTextModel model,
         int seconds)
     {
         return TryGet(
diff --git a/src/libs/OpenAI.Constants/TextToSpeech/TextToSpeechModel.cs b/src/libs/OpenAI.Constants/TextToSpeech/TextToSpeechModel.cs
new file mode 100644
index 00000000..9238916d
--- /dev/null
+++ b/src/libs/OpenAI.Constants/TextToSpeech/TextToSpeechModel.cs
@@ -0,0 +1,41 @@
+namespace OpenAI.Constants;
+
+/// <summary>
+/// According https://platform.openai.com/docs/guides/text-to-speech
+/// </summary>
+public readonly record struct TextToSpeechModel(string Value)
+{
+    /// <summary>
+    /// Transcribe audio into whatever language the audio is in. <br/>
+    /// File uploads are currently limited to 25 MB and the following input file types are supported: mp3, mp4, mpeg, mpga, m4a, wav, and webm. <br/>
+    /// </summary>
+    internal const string Tts1Value = "tts-1";
+    
+    /// <summary>
+    /// Transcribe audio into whatever language the audio is in. <br/>
+    /// File uploads are currently limited to 25 MB and the following input file types are supported: mp3, mp4, mpeg, mpga, m4a, wav, and webm. <br/>
+    /// </summary>
+    internal const string Tts1HdValue = "tts-1-hd";
+    
+    /// <inheritdoc cref="Tts1Value"/>
+    public static TextToSpeechModel Tts1 { get; } = new(Tts1Value);
+    
+    /// <inheritdoc cref="Tts1HdValue"/>
+    public static TextToSpeechModel Tts1Hd { get; } = new(Tts1HdValue);
+
+    /// <inheritdoc/>
+    public override string ToString()
+    {
+        return Value;
+    }
+
+    /// <summary>
+    /// Implicitly converts <see cref="TextToSpeechModel"/> to <see cref="string"/>.
+    /// </summary>
+    /// <param name="model"></param>
+    /// <returns></returns>
+    public static implicit operator string(TextToSpeechModel model)
+    {
+        return model.Value;
+    }
+}
\ No newline at end of file
diff --git a/src/libs/OpenAI.Constants/TextToSpeech/TextToSpeechPrices.cs b/src/libs/OpenAI.Constants/TextToSpeech/TextToSpeechPrices.cs
new file mode 100644
index 00000000..5721b7fa
--- /dev/null
+++ b/src/libs/OpenAI.Constants/TextToSpeech/TextToSpeechPrices.cs
@@ -0,0 +1,43 @@
+namespace OpenAI.Constants;
+
+/// <summary>
+/// All prices in USD. <br/>
+/// According https://openai.com/pricing/ <br/>
+/// </summary>
+public static class TextToSpeechPrices
+{
+    /// <inheritdoc cref="TextToSpeechPrices"/>
+    /// <param name="model"></param>
+    /// <param name="characters"></param>
+    /// <returns></returns>
+    /// <exception cref="NotImplementedException"></exception>
+    public static double? TryGet(
+        TextToSpeechModel model,
+        int characters)
+    {
+        var pricePerCharacter = model.Value switch
+        {
+            TextToSpeechModel.Tts1Value => 0.015 * 0.001,
+            TextToSpeechModel.Tts1HdValue => 0.030 * 0.001,
+            
+            _ => -1.0,
+        };
+        if (pricePerCharacter < 0.0)
+        {
+            return null;
+        }
+        
+        return characters * pricePerCharacter;
+    }
+    
+    /// <inheritdoc cref="TryGet(TextToSpeechModel, int)"/>
+    public static double Get(
+        TextToSpeechModel model,
+        int characters)
+    {
+        return TryGet(
+                   model: model,
+                   characters: characters) ??
+               throw new NotImplementedException();
+    }
+}
\ No newline at end of file