### Install tiktoken_ruby Gem

Source: https://github.com/iapark/tiktoken_ruby/blob/main/README.md

Instructions for installing the tiktoken_ruby gem using Bundler for dependency management or directly via the `gem install` command.

```sh
bundle add tiktoken_ruby
```

```sh
gem install tiktoken_ruby
```

--------------------------------

### Set Up tiktoken_ruby Development Environment

Source: https://github.com/iapark/tiktoken_ruby/blob/main/README.md

Commands to clone the tiktoken_ruby repository, navigate into the directory, install Ruby dependencies, compile native extensions, and run the test suite for local development.

```sh
git clone https://github.com/IAPark/tiktoken_ruby.git
cd tiktoken_ruby
bundle install
bundle exec rake compile
bundle exec rake spec
```

--------------------------------

### Encode and Decode Text with tiktoken_ruby

Source: https://github.com/iapark/tiktoken_ruby/blob/main/README.md

Demonstrates how to initialize a Tiktoken encoder for a specific encoding (cl100k_base) and use it to encode a string into tokens, then decode the tokens back to the original string.

```ruby
require 'tiktoken_ruby'
enc = Tiktoken.get_encoding("cl100k_base")
enc.decode(enc.encode("hello world")) #=> "hello world"
```

--------------------------------

### Retrieve Tiktoken Encoder by Model Name

Source: https://github.com/iapark/tiktoken_ruby/blob/main/README.md

Shows how to obtain a Tiktoken encoder instance by specifying a GPT model name (e.g., 'gpt-4') and then use it to encode a string to determine its token count.

```ruby
require 'tiktoken_ruby'

enc = Tiktoken.encoding_for_model("gpt-4")
enc.encode("hello world").length #=> 2
```

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