The fastest tokenizer for GPT-3.5 and GPT-4 inspired by Tiktoken.
Get Started
$ dotnet add package TiktokenReadme
Tiktoken
This implementation aims for maximum performance, especially in the token count operation.
There's also a benchmark console app here for easy tracking of this.
We will be happy to accept any PR.
Implemented encodings
cl100k_baser50k_basep50k_basep50k_edit
Usage
var encoding = Tiktoken.Encoding.ForModel("gpt-4");
var tokens = encoding.Encode("hello world"); // [15339, 1917]
var text = encoding.Decode(tokens); // hello world
var numberOfTokens = encoding.CountTokens(text); // 2
var encoding = Tiktoken.Encoding.Get("p50k_base");
var tokens = encoding.Encode("hello world"); // [31373, 995]
var text = encoding.Decode(tokens); // hello world