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.NETStandard2.0

The Microsoft.ML.Tokenizers.Data.O200kBase includes the Tiktoken tokenizer data file o200k_base.tiktoken, which is utilized by models such as gpt-4o.

Published
Sep 9, 2026
1mo ago
Total Downloads
3.9M
3,914,730

Install

dotnet add package Microsoft.ML.Tokenizers.Data.O200kBase --version 3.0.0-preview.26457.2
ProductVersions
.NET Standard
netstandard2.0

README

About

The Microsoft.ML.Tokenizers.Data.O200kBase includes the Tiktoken tokenizer data file o200k_base.tiktoken, which is utilized by models such as Gpt-4o.

Key Features

  • This package mainly contains the o200k_base.tiktoken file, which is used by the Tiktoken tokenizer. This data file is used by the Gpt-4o model.

How to Use

Reference this package in your project to use the Tiktoken tokenizer with the specified model.


// Create a tokenizer for the specified model
Tokenizer tokenizer = TiktokenTokenizer.CreateForModel("Gpt-4o");

// Create a tokenizer for the specified encoding
Tokenizer tokenizer = TiktokenTokenizer.CreateForEncoding("o200k_base");

Main Types

Users shouldn't use any types exposed by this package directly. This package is intended to provide tokenizer data files.

Additional Documentation

Related Packages

Microsoft.ML.Tokenizers

Feedback & Contributing

Microsoft.ML.Tokenizers.Data.O200kBase is released as open source under the MIT license. Bug reports and contributions are welcome at the GitHub repository.

Changes from Previous Version

No structural changes between v3.0.0-preview.26160.2 and v3.0.0-preview.26457.2.

Adoption Assessment

A verified publisher signal is available. Assess fit from the package's supported frameworks, license and dependency graph rather than popularity alone.

This version is marked prerelease. Validate its API and upgrade path before production use.Compatibility metadata lists 1 target framework; confirm the exact target used by your application.

Related Guides & Workflows

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