Make suitable for an engine which only returns ONE model in the list.

async-openai/src/types/model.rs

@@ -1,4 +1,12 @@
 use serde::{Deserialize, Serialize};
+/// Describes an OpenAI model offering that can be used with the API.
+#[derive(Debug, Deserialize, Serialize, Clone, PartialEq)]
+pub struct ModelStats {
+    pub queue_fraction: f32,
+    pub queue_absolute: u32,
+    pub results_pending: u32,
+    pub batch_size: u32,
+}
 
 /// Describes an OpenAI model offering that can be used with the API.
 #[derive(Debug, Deserialize, Serialize, Clone, PartialEq)]
@@ -11,12 +19,16 @@ pub struct Model {
     pub created: u32,
     /// The organization that owns the model.
     pub owned_by: String,
+    /// Optional stats field provided when using Infinity Engine
+    pub stats: ModelStats,
+    /// Optional backend field provided when using Infinity Engine
+    pub backend: String,
 }
 
 #[derive(Debug, Deserialize, Clone, PartialEq, Serialize)]
 pub struct ListModelResponse {
     pub object: String,
-    pub data: Vec<Model>,
+    pub data: Model,
 }
 
 #[derive(Debug, Deserialize, Clone, PartialEq, Serialize)]