fast-deepseek: Building a Lightweight DeepSeek Client for Ruby

Wed, 26 Mar 2025 18:12:39 -0400

AI APIs have become remarkably easy to call.

The hard part isn’t sending an HTTP request. It’s deciding how much abstraction you actually need.

When I started experimenting with DeepSeek from Ruby, I didn’t want an AI framework, an agent abstraction, or a large dependency tree. I wanted this:

client = FastDeepseek::Client.new(
 api_key: ENV.fetch("DEEPSEEK_API_KEY")
)

response = client.chat(
 "Explain Ruby blocks in simple terms",
 model: "deepseek-chat"
)

That idea became fast-deepseek on RubyGems and fast-deepseek on GitHub — a lightweight Ruby client for the DeepSeek API.

Ruby on Uday K

fast-deepseek: Building a Lightweight DeepSeek Client for Ruby