ruby_llm

RubyLLM is a Ruby gem that provides a unified interface for calling over 800 AI models across providers including Anthropic (Claude), OpenAI, Google Gemini, Mistral, DeepSeek, Ollama, and others through a single consistent API. Developers access Claude through the standard Anthropic API integration, configuring an API key and selecting any Claude model such as claude-sonnet-4 via the `RubyLLM.chat` interface or the `acts_as_chat` Rails model concern. The library supports chat, image analysis, PDF and document parsing, audio transcription via `RubyLLM.transcribe`, image generation via `RubyLLM.paint`, embeddings, content moderation, streaming responses, structured JSON output via `RubyLLM::Schema`, and tool use through a `RubyLLM::Tool` base class that lets Claude call arbitrary Ruby methods. Reusable agents with persistent instructions and tool sets are defined by subclassing `RubyLLM::Agent`. A Rails generator scaffolds database-backed chat persistence and a ready-to-use chat UI at `/chats`. The standout detail is that the entire framework ships with only three dependencies: Faraday, Zeitwerk, and Marcel. Ruby and Rails developers building AI-backed applications benefit most.

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