Mistral Ruby Client

Mistral is a Ruby gem to interact with the Mistral AI API.

This client is a 1:1 port of Mistral's client-python. For a detailed comparison between the Ruby and Python clients, please refer to the PYTHON_CLIENT_COMPARISON.md file.

🔑 Key features

• API parity with the official Python client
• Full support for all Mistral AI functionalities, including chat completions, embeddings, and function calling
• Asynchronous streaming of responses
• Comprehensive error handling and retry mechanisms
• Configurable client options (e.g., API endpoint, timeout, max retries)
• Fully leverages dry-struct for type safety and avoids primitive obsession with hashes

📦 Installation

Install the gem and add to the application's Gemfile by executing:

$ bundle add mistral

If bundler is not being used to manage dependencies, install the gem by executing:

$ gem install mistral

⚡️ Quickstart

Here are a few examples of how to use the Mistral gem:

Chat completion

require 'mistral'

api_key = ENV.fetch('MISTRAL_API_KEY')
client = Mistral::Client.new(api_key: api_key)

model = 'mistral-small'

chat_response = client.chat(
 model: model,
 messages: [
   Mistral::ChatMessage.new(role: 'user', content: 'What is the best French cheese?')
 ]
)

puts chat_response.choices[0].message.content

Chat completion with streaming

require 'mistral'

api_key = ENV.fetch('MISTRAL_API_KEY')
client = Mistral::Client.new(api_key: api_key)

model = 'mistral-small'

client.chat_stream(
  model: model,
  messages: [
    Mistral::ChatMessage.new(role: 'user', content: 'What is the best French cheese?')
  ]
).each do |chunk|
  print chunk.choices[0].delta.content if chunk.choices[0].delta.content
end

📚 Documentation

In the examples folder, you will find how to do:

File Name	Description
chat_no_streaming.rb	How to use the chat endpoint without streaming
chat_with_streaming.rb	How to use the chat endpoint with streaming
chatbot_with_streaming.rb	A simple interactive chatbot using streaming
embeddings.rb	How to use the embeddings endpoint
function_calling.rb	How to call functions using the chat endpoint
json_format.rb	How to request and parse JSON responses from the chat endpoint
list_models.rb	How to list available models

🔨 Development

After checking out the repo, run bin/setup to install dependencies.

To install this gem onto your local machine, run bundle exec rake install.

You can also run bin/console for an interactive prompt that will allow you to experiment.

To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and the created tag, and push the .gem file to rubygems.org.

The health and maintainability of the codebase is ensured through a set of Rake tasks to test and lint the gem:

rake build                    # Build mistral into the pkg directory
rake build:checksum           # Generate SHA512 checksum if mistral.gem into the checksums directory
rake clean                    # Remove any temporary products
rake clobber                  # Remove any generated files
rake install                  # Build and install mistral.gem into system gems
rake install:local            # Build and install mistral.gem into system gems without network access
rake release[remote]          # Create tag v0.1.0 and build and push mistral.gem to https://rubygems.org
rake rubocop                  # Run RuboCop
rake rubocop:autocorrect      # Autocorrect RuboCop offenses (only when it's safe)
rake rubocop:autocorrect_all  # Autocorrect RuboCop offenses (safe and unsafe)
rake test                     # Run the test suite
rake test:cmd                 # Print out the test command
rake test:isolated            # Show which test files fail when run in isolation
rake test:slow                # Show bottom 25 tests wrt time

🐞 Issues & Bugs

If you find any issues or bugs, please report them here, I will be happy to have a look at them and fix them as soon as possible.

Please let me know if the client-python introduces any new features, so I can keep this gem in sync with the latest updates.

🤝 Contributing

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

📜 License

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

👔 Code of Conduct

Everyone interacting in the mistral project's codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.