OmniAI::Anthropic

An Anthropic implementation of the OmniAI APIs.

Installation

gem install omniai-anthropic

Usage

Client

A client is setup as follows if ENV['ANTHROPIC_API_KEY'] exists:

client = OmniAI::Anthropic::Client.new

A client may also be passed the following options:

• api_key (required - default is ENV['ANTHROPIC_API_KEY'])
• host (optional)

Configuration

Global configuration is supported for the following options:

OmniAI::Anthropic.configure do |config|
  config.api_key = '...' # default: ENV['ANTHROPIC_API_KEY']
  config.host = '...' # default: 'https://api.anthropic.com'
end

Chat

A chat completion is generated by passing in prompts using any a variety of formats:

completion = client.chat('Tell me a joke!')
completion.choice.message.content # 'Why did the chicken cross the road? To get to the other side.'

completion = client.chat do |prompt|
  prompt.system('You are a helpful assistant.')
  prompt.user('What is the capital of Canada?')
end
completion.choice.message.content # 'The capital of Canada is Ottawa.'

Model

model takes an optional string (default is claude-3-haiku-20240307):

completion = client.chat('Provide code for fibonacci', model: OmniAI::Anthropic::Chat::Model::CLAUDE_SONNET)
completion.choice.message.content # 'def fibonacci(n)...end'

Anthropic API Reference model

Temperature

temperature takes an optional float between 0.0 and 1.0 (defaults is 0.7):

completion = client.chat('Pick a number between 1 and 5', temperature: 1.0)
completion.choice.message.content # '3'

Anthropic API Reference temperature

Stream

stream takes an optional a proc to stream responses in real-time chunks instead of waiting for a complete response:

stream = proc do |chunk|
  print(chunk.choice.delta.content) # 'Better', 'three', 'hours', ...
end
client.chat('Be poetic.', stream:)

Anthropic API Reference stream

Format

format takes an optional symbol (:json) and modifies requests to send additional system text requesting JSON:

completion = client.chat(format: :json) do |prompt|
  prompt.system(OmniAI::Chat::JSON_PROMPT)
  prompt.user('What is the name of the drummer for the Beatles?')
JSON.parse(completion.choice.message.content) # { "name": "Ringo" }

Anthropic API Reference control-output-format