Update to gpt-4o (#35)

Author: lzell

Examples/SwiftOpenAIExample/SwiftOpenAIExample/ChatDemo/ChatDemoView.swift

@@ -75,7 +75,7 @@ struct ChatDemoView: View {
                   messages: [.init(
                   role: .user,
                   content: content)],
-                  model: .gpt41106Preview,
+                  model: .gpt4o,
                   logProbs: true,
                   topLogprobs: 1)
                switch selectedSegment {

README.md

@@ -878,7 +878,7 @@ public struct ChatCompletionObject: Decodable {
 Usage
 ```swift
 let prompt = "Tell me a joke"
-let parameters = ChatCompletionParameters(messages: [.init(role: .user, content: .text(prompt))], model: .gpt41106Preview)
+let parameters = ChatCompletionParameters(messages: [.init(role: .user, content: .text(prompt))], model: .gpt4o)
 let chatCompletionObject = service.startChat(parameters: parameters)
 ```
 
@@ -966,7 +966,7 @@ public struct ChatCompletionChunkObject: Decodable {
 Usage
 ```swift
 let prompt = "Tell me a joke"
-let parameters = ChatCompletionParameters(messages: [.init(role: .user, content: .text(prompt))], model: .gpt41106Preview)
+let parameters = ChatCompletionParameters(messages: [.init(role: .user, content: .text(prompt))], model: .gpt4o)
 let chatCompletionObject = try await service.startStreamedChat(parameters: parameters)
 ```
 
@@ -1042,14 +1042,14 @@ For more details about how to also uploading base 64 encoded images in iOS check
 
 ### Vision
 
-[Vision](https://platform.openai.com/docs/guides/vision) API is available for use; developers must access it through the chat completions API, specifically using the gpt-4-vision-preview model. Using any other model will not provide an image description
+[Vision](https://platform.openai.com/docs/guides/vision) API is available for use; developers must access it through the chat completions API, specifically using the gpt-4-vision-preview model or gpt-4o model. Using any other model will not provide an image description
 
 Usage
 ```swift
 let imageURL = "https://upload.wikimedia.org/wikipedia/commons/thumb/d/dd/Gfp-wisconsin-madison-the-nature-boardwalk.jpg/2560px-Gfp-wisconsin-madison-the-nature-boardwalk.jpg"
 let prompt = "What is this?"
 let messageContent: [ChatCompletionParameters.Message.ContentType.MessageContent] = [.text(prompt), .imageUrl(imageURL)] // Users can add as many `.imageUrl` instances to the service.
-let parameters = ChatCompletionParameters(messages: [.init(role: .user, content: .contentArray(messageContent))], model: .gpt4VisionPreview)
+let parameters = ChatCompletionParameters(messages: [.init(role: .user, content: .contentArray(messageContent))], model: .gpt4o)
 let chatCompletionObject = try await service.startStreamedChat(parameters: parameters)
 ```
 

Sources/OpenAI/Public/Parameters/Model.swift

@@ -12,6 +12,19 @@ import Foundation
 public enum Model {
 
    /// Chat completion
+
+   /// ### Omicron model
+   /// As of 2024-05-13, this is the latest and greatest from OpenAI.
+   /// From their [docs](https://platform.openai.com/docs/models/gpt-4o):
+   ///
+   ///   > GPT-4o (“o” for “omni”) is our most advanced model. It is multimodal (accepting text or image inputs
+   ///   > and outputting text), and it has the same high intelligence as GPT-4 Turbo but is much more efficient—
+   ///   > it generates text 2x faster and is 50% cheaper. Additionally, GPT-4o has the best vision and performance
+   ///   > across non-English languages of any of our models
+   ///
+   case gpt4o // Points to gpt-4o-2024-05-13
+   case gpt4o20240513 // 128k context window with training data up to Oct 2023
+
    case gpt35Turbo
    case gpt35Turbo1106 // Most updated - Supports parallel function calls
    /// The latest GPT-3.5 Turbo model with higher accuracy at responding in requested formats and a fix for a bug which caused a text encoding issue for non-English language function calls. Returns a maximum of 4,096 output tokens. [Learn more](https://openai.com/blog/new-embedding-models-and-api-updates#:~:text=Other%20new%20models%20and%20lower%20pricing).
@@ -45,6 +58,8 @@ public enum Model {
 
    public var value: String {
       switch self {
+      case .gpt4o: return "gpt-4o"
+      case .gpt4o20240513: return "gpt-4o-2024-05-13"
       case .gpt35Turbo: return "gpt-3.5-turbo"
       case .gpt35Turbo1106: return "gpt-3.5-turbo-1106"
       case .gpt35Turbo0125: return "gpt-3.5-turbo-0125"