OpenRouter

The future will bring us hundreds of language models and dozens of providers for each. How will you choose the best?

The OpenRouter API is a single unified interface for all LLMs! And now you can easily use it with Ruby! 🤖🌌

• Prioritize price or performance: OpenRouter scouts for the lowest prices and best latencies/throughputs across dozens of providers, and lets you choose how to prioritize them.
• Standardized API: No need to change your code when switching between models or providers. You can even let users choose and pay for their own.
• Easy integration: This Ruby gem provides a simple and intuitive interface to interact with the OpenRouter API, making it effortless to integrate AI capabilities into your Ruby applications.

👬 This Ruby library was originally bootstrapped from the 🤖 Anthropic gem by Alex Rudall, and subsequently extracted from the codebase of my fast-growing AI startup called Olympia that lets you add AI-powered consultants to your startup!

🚢 Need someone to develop AI software for you using modern Ruby on Rails? My other company Magma Labs does exactly that: magmalabs.io. In fact, we also sell off-the-shelf solutions based on my early work on the field, via a platform called MagmaChat

🐦 Olympia's Twitter | 🐦 Obie's Twitter | 🎮 Ruby AI Builders Discord

Add this line to your application's Gemfile:

gem "open_router"

And then execute:

$ bundle install

Or install with:

$ gem install open_router

and require with:

require "open_router"

• Get your API key from https://openrouter.ai/keys

Configure the gem with your API keys, for example in an open_router.rb initializer file. Never hardcode secrets into your codebase - instead use Rails.application.credentials or something like dotenv to pass the keys safely into your environments.

OpenRouter.configure do |config|
  config.access_token = Rails.application.credentials.open_router[:access_token]
  config.site_name = 'Olympia'
  config.site_url = 'https://olympia.chat'
end

Then you can create a client like this:

client = OpenRouter::Client.new

The configuration object exposes a faraday method that you can pass a block to configure Faraday settings and middleware.

This example adds faraday-retry and a logger that redacts the api key so it doesn't get leaked to logs.

require 'faraday/retry'

retry_options = {
  max: 2,
  interval: 0.05,
  interval_randomness: 0.5,
  backoff_factor: 2
}

OpenRouter::Client.new(access_token: ENV["ACCESS_TOKEN"]) do |config|
  config.faraday do |f|
    f.request :retry, retry_options
    f.response :logger, ::Logger.new($stdout), { headers: true, bodies: true, errors: true } do |logger|
      logger.filter(/(Bearer) (\S+)/, '\1[REDACTED]')
    end
  end
end

The default timeout for any request using this library is 120 seconds. You can change that by passing a number of seconds to the request_timeout when initializing the client.

client = OpenRouter::Client.new(
    access_token: "access_token_goes_here",
    request_timeout: 240 # Optional
)

Hit the OpenRouter API for a completion:

messages = [
  { role: "system", content: "You are a helpful assistant." },
  { role: "user", content: "What is the color of the sky?" }
]

response = client.complete(messages)
puts response["choices"][0]["message"]["content"]
# => "The sky is typically blue during the day due to a phenomenon called Rayleigh scattering. Sunlight..."

Pass an array to the model parameter to enable explicit model routing.

OpenRouter::Client.new.complete(
  [
    { role: "system", content: SYSTEM_PROMPT },
    { role: "user", content: "Provide analysis of the data formatted as JSON:" }
  ],
  model: [
    "mistralai/mixtral-8x7b-instruct:nitro",
    "mistralai/mixtral-8x7b-instruct"
  ],
  extras: {
    response_format: {
      type: "json_object"
    }
  }
)

Browse full list of models available or fetch from the OpenRouter API:

models = client.models
puts models
# => [{"id"=>"openrouter/auto", "object"=>"model", "created"=>1684195200, "owned_by"=>"openrouter", "permission"=>[], "root"=>"openrouter", "parent"=>nil}, ...]

Query the generation stats for a given generation ID:

generation_id = "generation-abcdefg"
stats = client.query_generation_stats(generation_id)
puts stats
# => {"id"=>"generation-abcdefg", "object"=>"generation", "created"=>1684195200, "model"=>"openrouter/auto", "usage"=>{"prompt_tokens"=>10, "completion_tokens"=>50, "total_tokens"=>60}, "cost"=>0.0006}

The client will raise an OpenRouter::ServerError in the case of an error returned from a completion (or empty response).

Bug reports and pull requests are welcome on GitHub at https://github.com/OlympiaAI/open_router. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the code of conduct.

The gem is available as open source under the terms of the MIT License.