fix(api): fix discriminator propertyName for ResponseFormatJsonSchema

Author: stainless-app[bot]

.stats.yml

@@ -1,4 +1,4 @@
 configured_endpoints: 135
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/openai%2Fopenai-812a10f8fb54c584efc914422b574cb3f43dc238b5733b13f6a0b2308b7d9910.yml
-openapi_spec_hash: 0222041ba12a5ff6b94924a834fa91a2
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/openai%2Fopenai-a4bb37d110a22c2888f53e21281434686a6fffa3e672a40f2503ad9bd2759063.yml
+openapi_spec_hash: 2d59eefb494dff4eea8c3d008c7e2070
 config_hash: 50ee3382a63c021a9f821a935950e926

lib/openai/models/chat/completion_create_params.rb

@@ -564,12 +564,14 @@ module Modality
         module ResponseFormat
           extend OpenAI::Internal::Type::Union
 
+          discriminator :type
+
           # Default response format. Used to generate text responses.
-          variant -> { OpenAI::ResponseFormatText }
+          variant :text, -> { OpenAI::ResponseFormatText }
 
           # JSON Schema response format. Used to generate structured JSON responses.
           # Learn more about [Structured Outputs](https://platform.openai.com/docs/guides/structured-outputs).
-          variant -> { OpenAI::ResponseFormatJSONSchema }
+          variant :json_schema, -> { OpenAI::ResponseFormatJSONSchema }
 
           # An {OpenAI::BaseModel} can be provided and implicitly converted into {OpenAI::Models::ResponseFormatJSONSchema}.
           # See examples for more details.
@@ -581,7 +583,7 @@ module ResponseFormat
           # Using `json_schema` is recommended for models that support it. Note that the
           # model will not generate JSON without a system or user message instructing it
           # to do so.
-          variant -> { OpenAI::ResponseFormatJSONObject }
+          variant :json_object, -> { OpenAI::ResponseFormatJSONObject }
 
           # @!method self.variants
           #   @return [Array(OpenAI::Models::ResponseFormatText, OpenAI::Models::ResponseFormatJSONSchema, OpenAI::Models::ResponseFormatJSONObject)]