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550+ Free LLM Tools for Builders: APIs, Local Models, RAG & Agents (No Paywall)

550+ Free LLM Tools for Builders: APIs, Local Models, RAG & Agents (No Paywall)

550+ 免費大型語言模型工具大全:API、本地模型、RAG、智能代理、開發環境

I spent a whole day curating a massive list of actually useful free and cheap LLM tools for developers. Unlike those generic "1000 AI websites" roundups, this focuses on what builders actually need: local models you can run yourself (Ollama, Qwen, Llama), free APIs that won't drain your wallet (OpenRouter, Groq, Gemini), coding IDEs and CLI tools (Cursor, Qwen Code), RAG stack components (vector databases, embeddings, frameworks), and agent frameworks for automation. Everything here is either completely free or genuinely affordable—no subscription traps.

Keywords

free toolsLLMlocal modelsAPIsRAGagentsIDEsdevelopersbuilders