feat: add new model gpt-3.5-turbo-16k (#126)

README.md

@@ -183,6 +183,7 @@ dry_run             false
 > .model gpt-4
 > .model gpt-4-32k
 > .model gpt-3.5-turbo
+> .model gpt-3.5-turbo-16k
 ```
 
 ### `.prompt` - use GPT prompt

src/config/mod.rs

@@ -23,10 +23,11 @@ use std::{
     sync::Arc,
 };
 
-pub const MODELS: [(&str, usize); 3] = [
+pub const MODELS: [(&str, usize); 4] = [
     ("gpt-4", 8192),
     ("gpt-4-32k", 32768),
     ("gpt-3.5-turbo", 4096),
+    ("gpt-3.5-turbo-16k", 16384),
 ];
 
 const CONFIG_FILE_NAME: &str = "config.yaml";