feat: Support Anyscale API in openai_dart client (#303)

packages/openai_dart/README.md

@@ -865,6 +865,39 @@ final client = OpenAIClient(
 - `YOUR_API_KEY`: This value can be found in the Keys & Endpoint section when examining your resource from the Azure portal.
 - `API_VERSION`: The Azure OpenAI API version to use (e.g. `2023-05-15`). Try to use the [latest version available](https://github.com/Azure/azure-rest-api-specs/tree/main/specification/cognitiveservices/data-plane/AzureOpenAI/inference), it will probably be the closest to the official OpenAI API.
 
+### OpenAI-compatible APIs
+
+This client can be used to consume APIs that are compatible with the OpenAI API spec.
+
+[TogetherAI](https://www.together.ai/):
+
+```dart
+final client = OpenAIClient(
+  baseUrl: 'https://api.together.xyz/v1',
+  headers: { 'api-key': 'YOUR_TOGETHER_AI_API_KEY' },
+);
+```
+
+[Anyscale](https://www.anyscale.com/):
+
+```dart
+final client = OpenAIClient(
+  baseUrl: 'https://api.endpoints.anyscale.com/v1',
+  headers: { 'api-key': 'YOUR_ANYSCALE_API_KEY' },
+);
+```
+
+[OpenRouter](https://openrouter.ai):
+
+```dart
+final client = OpenAIClient(
+  baseUrl: 'https://openrouter.ai/api/v1',
+  headers: { 'api-key': 'YOUR_OPEN_ROUTER_API_KEY' },
+);
+```
+
+Etc.
+
 ### Default HTTP client
 
 By default, the client uses the following implementation of `http.Client`:

packages/openai_dart/lib/src/generated/schema/create_chat_completion_response.dart

@@ -34,7 +34,7 @@ class CreateChatCompletionResponse with _$CreateChatCompletionResponse {
     String? systemFingerprint,
 
     /// The object type, which is always `chat.completion`.
-    required CreateChatCompletionResponseObject object,
+    required String object,
 
     /// Usage statistics for the completion request.
     @JsonKey(includeIfNull: false) CompletionUsage? usage,
@@ -73,13 +73,3 @@ class CreateChatCompletionResponse with _$CreateChatCompletionResponse {
     };
   }
 }
-
-// ==========================================
-// ENUM: CreateChatCompletionResponseObject
-// ==========================================
-
-/// The object type, which is always `chat.completion`.
-enum CreateChatCompletionResponseObject {
-  @JsonValue('chat.completion')
-  chatCompletion,
-}

packages/openai_dart/lib/src/generated/schema/schema.freezed.dart

@@ -7436,8 +7436,7 @@ mixin _$CreateChatCompletionResponse {
   String? get systemFingerprint => throw _privateConstructorUsedError;
 
   /// The object type, which is always `chat.completion`.
-  CreateChatCompletionResponseObject get object =>
-      throw _privateConstructorUsedError;
+  String get object => throw _privateConstructorUsedError;
 
   /// Usage statistics for the completion request.
   @JsonKey(includeIfNull: false)
@@ -7464,7 +7463,7 @@ abstract class $CreateChatCompletionResponseCopyWith<$Res> {
       String model,
       @JsonKey(name: 'system_fingerprint', includeIfNull: false)
       String? systemFingerprint,
-      CreateChatCompletionResponseObject object,
+      String object,
       @JsonKey(includeIfNull: false) CompletionUsage? usage});
 
   $CompletionUsageCopyWith<$Res>? get usage;
@@ -7516,7 +7515,7 @@ class _$CreateChatCompletionResponseCopyWithImpl<$Res,
       object: null == object
           ? _value.object
           : object // ignore: cast_nullable_to_non_nullable
-              as CreateChatCompletionResponseObject,
+              as String,
       usage: freezed == usage
           ? _value.usage
           : usage // ignore: cast_nullable_to_non_nullable
@@ -7553,7 +7552,7 @@ abstract class _$$CreateChatCompletionResponseImplCopyWith<$Res>
       String model,
       @JsonKey(name: 'system_fingerprint', includeIfNull: false)
       String? systemFingerprint,
-      CreateChatCompletionResponseObject object,
+      String object,
       @JsonKey(includeIfNull: false) CompletionUsage? usage});
 
   @override
@@ -7605,7 +7604,7 @@ class __$$CreateChatCompletionResponseImplCopyWithImpl<$Res>
       object: null == object
           ? _value.object
           : object // ignore: cast_nullable_to_non_nullable
-              as CreateChatCompletionResponseObject,
+              as String,
       usage: freezed == usage
           ? _value.usage
           : usage // ignore: cast_nullable_to_non_nullable
@@ -7666,7 +7665,7 @@ class _$CreateChatCompletionResponseImpl extends _CreateChatCompletionResponse {
 
   /// The object type, which is always `chat.completion`.
   @override
-  final CreateChatCompletionResponseObject object;
+  final String object;
 
   /// Usage statistics for the completion request.
   @override
@@ -7730,7 +7729,7 @@ abstract class _CreateChatCompletionResponse
           required final String model,
           @JsonKey(name: 'system_fingerprint', includeIfNull: false)
           final String? systemFingerprint,
-          required final CreateChatCompletionResponseObject object,
+          required final String object,
           @JsonKey(includeIfNull: false) final CompletionUsage? usage}) =
       _$CreateChatCompletionResponseImpl;
   const _CreateChatCompletionResponse._() : super._();
@@ -7765,7 +7764,7 @@ abstract class _CreateChatCompletionResponse
   @override
 
   /// The object type, which is always `chat.completion`.
-  CreateChatCompletionResponseObject get object;
+  String get object;
   @override
 
   /// Usage statistics for the completion request.

packages/openai_dart/oas/openapi_curated.yaml

@@ -1939,7 +1939,7 @@ components:
         object:
           type: string
           description: The object type, which is always `chat.completion`.
-          enum: [ chat.completion ]
+          # enum: [ chat.completion ] # Anyscale API sends `text_completion` instead
         usage:
           $ref: "#/components/schemas/CompletionUsage"
       required:

packages/openai_dart/test/openai_client_chat_test.dart

@@ -63,7 +63,7 @@ void main() {
         expect(res.id, isNotEmpty);
         expect(res.created, greaterThan(0));
         expect(res.model, startsWith('gpt-'));
-        expect(res.object, CreateChatCompletionResponseObject.chatCompletion);
+        expect(res.object, isNotEmpty);
         expect(res.usage?.promptTokens, greaterThan(0));
         expect(res.usage?.completionTokens, greaterThan(0));
         expect(res.usage?.totalTokens, greaterThan(0));