Tiktoken 1.1.1

There is a newer version of this package available.
See the version list below for details.
dotnet add package Tiktoken --version 1.1.1                
NuGet\Install-Package Tiktoken -Version 1.1.1                
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.
<PackageReference Include="Tiktoken" Version="1.1.1" />                
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add Tiktoken --version 1.1.1                
#r "nuget: Tiktoken, 1.1.1"                
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.
// Install Tiktoken as a Cake Addin
#addin nuget:?package=Tiktoken&version=1.1.1

// Install Tiktoken as a Cake Tool
#tool nuget:?package=Tiktoken&version=1.1.1                

Tiktoken

Nuget package dotnet License: MIT Discord

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_base
  • r50k_base
  • p50k_base
  • p50k_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

Benchmarks

You can view the reports for each version here


BenchmarkDotNet=v0.13.5, OS=macOS Ventura 13.4 (22F66) [Darwin 22.5.0]
Apple M1 Pro, 1 CPU, 10 logical and 10 physical cores
.NET SDK=7.0.304
  [Host]     : .NET 7.0.7 (7.0.723.27404), Arm64 RyuJIT AdvSIMD
  Job-EVPJQP : .NET 7.0.7 (7.0.723.27404), Arm64 RyuJIT AdvSIMD DEBUG

BuildConfiguration=Debug  

Method Categories Data Mean Ratio Gen0 Gen1 Gen2 Allocated Alloc Ratio
SharpTokenV1_0_28_ CountTokens 1. (...)57. [19866] 5,416,309.6 ns 1.00 601.5625 289.0625 - 3805771 B 1.00
TiktokenSharpV1_0_5_ CountTokens 1. (...)57. [19866] 1,532,135.7 ns 0.28 250.0000 125.0000 - 1571155 B 0.41
TokenizerLibV1_3_2_ CountTokens 1. (...)57. [19866] 856,737.2 ns 0.16 246.0938 87.8906 - 1547674 B 0.41
Tiktoken_ CountTokens 1. (...)57. [19866] 413,599.2 ns 0.08 49.3164 - - 309449 B 0.08
SharpTokenV1_0_28_ CountTokens Hello, World! 3,322.0 ns 1.00 0.6752 - - 4240 B 1.00
TiktokenSharpV1_0_5_ CountTokens Hello, World! 6,690.3 ns 2.02 2.1820 0.0381 - 13728 B 3.24
TokenizerLibV1_3_2_ CountTokens Hello, World! 642.2 ns 0.19 0.2356 - - 1480 B 0.35
Tiktoken_ CountTokens Hello, World! 326.3 ns 0.10 0.0420 - - 264 B 0.06
SharpTokenV1_0_28_ CountTokens King(...)edy. [275] 71,849.3 ns 1.00 8.5449 0.3662 - 54160 B 1.00
TiktokenSharpV1_0_5_ CountTokens King(...)edy. [275] 21,938.0 ns 0.31 5.0964 0.2136 - 32096 B 0.59
TokenizerLibV1_3_2_ CountTokens King(...)edy. [275] 8,467.3 ns 0.12 3.0823 0.1373 - 19344 B 0.36
Tiktoken_ CountTokens King(...)edy. [275] 4,616.9 ns 0.06 0.6409 - - 4032 B 0.07
SharpTokenV1_0_28_Encode Encode 1. (...)57. [19866] 5,639,328.3 ns 1.00 601.5625 296.8750 - 3805771 B 1.00
TiktokenSharpV1_0_5_Encode Encode 1. (...)57. [19866] 1,658,228.7 ns 0.29 251.9531 126.9531 1.9531 1571157 B 0.41
TokenizerLibV1_3_2_Encode Encode 1. (...)57. [19866] 926,416.4 ns 0.16 248.0469 124.0234 1.9531 1547678 B 0.41
Tiktoken_Encode Encode 1. (...)57. [19866] 430,360.1 ns 0.08 59.5703 29.7852 - 375665 B 0.10
SharpTokenV1_0_28_Encode Encode Hello, World! 3,417.4 ns 1.00 0.6752 0.0038 - 4240 B 1.00
TiktokenSharpV1_0_5_Encode Encode Hello, World! 6,804.5 ns 1.99 2.1820 0.0458 - 13728 B 3.24
TokenizerLibV1_3_2_Encode Encode Hello, World! 640.1 ns 0.19 0.2356 0.0010 - 1480 B 0.35
Tiktoken_Encode Encode Hello, World! 479.1 ns 0.14 0.1135 - - 712 B 0.17
SharpTokenV1_0_28_Encode Encode King(...)edy. [275] 62,696.5 ns 1.00 8.5449 0.4883 - 54160 B 1.00
TiktokenSharpV1_0_5_Encode Encode King(...)edy. [275] 27,168.7 ns 0.43 5.0964 0.3052 - 32096 B 0.59
TokenizerLibV1_3_2_Encode Encode King(...)edy. [275] 12,317.4 ns 0.20 3.0823 0.1831 - 19344 B 0.36
Tiktoken_Encode Encode King(...)edy. [275] 4,933.3 ns 0.08 0.8011 0.0153 - 5056 B 0.09

Possible optimizations

  • Modes - Fast(without special token regex)/Strict
  • SIMD?
  • Parallelism?
  • string as dictionary key?

Support

Priority place for bugs: https://github.com/tryAGI/LangChain/issues
Priority place for ideas and general questions: https://github.com/tryAGI/LangChain/discussions
Discord: https://discord.gg/Ca2xhfBf3v

Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 is compatible.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 is compatible.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 was computed.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed. 
.NET Core netcoreapp2.0 was computed.  netcoreapp2.1 was computed.  netcoreapp2.2 was computed.  netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard2.0 is compatible.  netstandard2.1 is compatible. 
.NET Framework net461 is compatible.  net462 was computed.  net463 was computed.  net47 was computed.  net471 was computed.  net472 was computed.  net48 was computed.  net481 was computed. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen tizen40 was computed.  tizen60 was computed. 
Xamarin.iOS xamarinios was computed. 
Xamarin.Mac xamarinmac was computed. 
Xamarin.TVOS xamarintvos was computed. 
Xamarin.WatchOS xamarinwatchos was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.
  • .NETFramework 4.6.1

  • .NETStandard 2.0

    • No dependencies.
  • .NETStandard 2.1

    • No dependencies.
  • net6.0

    • No dependencies.
  • net7.0

    • No dependencies.

NuGet packages (11)

Showing the top 5 NuGet packages that depend on Tiktoken:

Package Downloads
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Package Description

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last updated
2.0.3 908 7/10/2024
2.0.2 6,243 5/19/2024
2.0.1 96 5/18/2024
2.0.0 925 5/15/2024
1.2.0 55,100 2/18/2024
1.1.3 116,832 10/11/2023
1.1.2 79,899 8/28/2023
1.1.1 69,197 7/12/2023
1.1.0 1,740 6/28/2023
1.0.2 242 6/21/2023
1.0.1 292 6/16/2023
1.0.0 534 6/12/2023
0.9.7 223 6/11/2023
0.9.6 291 6/9/2023
0.9.5 211 6/9/2023
0.9.4 144 6/9/2023
0.9.3 134 6/9/2023
0.9.2 185 6/9/2023