Merge pull request #150 from dongri/chatgpt-4.5

Add gpt4.5 model

Author: dongri

src/v1/common.rs

@@ -24,6 +24,10 @@ macro_rules! impl_builder_methods {
 #[derive(Debug, Serialize, Deserialize)]
 pub struct EmptyRequestBody {}
 
+// https://platform.openai.com/docs/models#gpt-4-5
+pub const GPT4_5_PREVIEW: &str = "gpt-4.5-preview";
+pub const GPT4_5_PREVIEW_2025_02_27: &str = "gpt-4.5-preview-2025-02-27";
+
 // https://platform.openai.com/docs/models/o1
 pub const O1_PREVIEW: &str = "o1-preview";
 pub const O1_PREVIEW_2024_09_12: &str = "o1-preview-2024-09-12";