"llm" AI Tools

The OpenAI platform provides GPT model APIs, Assistants, fine-tuning, and Re

LlamaIndex

Freemium

LlamaIndex is the data framework for LLMs — hundreds of connectors turn priv

LangChain

Freemium

LangChain is the most popular LLM application framework — mature abstraction

OpenRouter

Freemium

OpenRouter routes a single API to hundreds of models — GPT, Claude, Gemini,