Support "omni" as model name

README.md

@@ -12,18 +12,18 @@ This library implements OpenAI APIs.
 
 TikToken
 --------
-Encodes text to tokens. Download the [cl100k_base](https://openaipublic.blob.core.windows.net/encodings/cl100k_base.tiktoken) and [o200k_base](https://openaipublic.blob.core.windows.net/encodings/o200k_base.tiktoken) vocabularies first!
+Encodes text to tokens. Download the vocabularies [cl100k_base](https://openaipublic.blob.core.windows.net/encodings/cl100k_base.tiktoken) (used for GPT-3.5 and GPT-4.0) and [o200k_base](https://openaipublic.blob.core.windows.net/encodings/o200k_base.tiktoken) (used for Omni and O1) first!
 
 ```php
 use com\openai\{Encoding, TikTokenFilesIn};
 
 $source= new TikTokenFilesIn('.');
 
-// GPT 3.5, 4.0 => [9906, 4435, 0]
+// By name => [9906, 4435, 0]
 $tokens= Encoding::named('cl100k_base')->load($source)->encode('Hello World!');
 
-// GPT o1, omni => [13225, 5922, 0]
-$tokens= Encoding::named('o200k_base')->load($source)->encode('Hello World!');
+// By model => [13225, 5922, 0]
+$tokens= Encoding::for('omni')->load($source)->encode('Hello World!');
 ```
 
 See also

src/main/php/com/openai/Encoding.class.php

@@ -69,9 +69,10 @@ public static function named(string $name): self {
    */
   public static function for(string $model): self {
     static $models= [
-      '/^o1/'      => 'o200k_base',
-      '/^gpt-4o/'  => 'o200k_base',
-      '/^gpt-4/'   => 'cl100k_base',
+      '/^o1/'       => 'o200k_base',
+      '/^omni/'     => 'o200k_base',
+      '/^gpt-4o/'   => 'o200k_base',
+      '/^gpt-4/'    => 'cl100k_base',
       '/^gpt-3.?5/' => 'cl100k_base',
     ];