Command line tool to call ChatGPT's Speech API from Ruby

speech.rb

require 'getoptlong'
require 'openai'

options = {
  'output' => 'speech.mp3'
}
parameters = {
  'model' => 'tts-1',
  'input' => nil,
  'voice' => 'alloy',
  'response_format' => 'mp3',
  'speed' => '1.0'
}
parser = GetoptLong.new
parser.set_options(
  ['--output', '-o', GetoptLong::REQUIRED_ARGUMENT],
  ['--model', '-m', GetoptLong::REQUIRED_ARGUMENT],
  ['--input', '-i', GetoptLong::REQUIRED_ARGUMENT],
  ['--voice', '-v', GetoptLong::REQUIRED_ARGUMENT],
  ['--response-format', '-f', GetoptLong::REQUIRED_ARGUMENT],
  ['--speed', '-s', GetoptLong::REQUIRED_ARGUMENT]
)
parser.each do |name, arg|
  name = name.delete_prefix('--').gsub(/-/, '_')
  case name
  when *parameters.keys
    parameters[name] = arg
  when *options.keys
    options[name] = arg
  end
end
parameters['input'] = ARGF.read if parameters['input'].nil?

client = OpenAI::Client.new(access_token: ENV['OPENAI_API_KEY'])

response = client.audio.speech(
  parameters: parameters
)
File.binwrite(options['output'], response)