Free LLM & RAG tools

Calculators and utilities for anyone building with LLMs — pricing, RAG costs, chunking, context windows, tool schemas, and chatbot ROI. Everything runs in your browser: no signup, nothing stored.

LLM price comparison

Live table of every model's API prices — sort, filter, and cost out your own request size.

LLM cost calculator

Estimate per-request, daily, and monthly spend from token counts and request volume.

RAG cost calculator

Full pipeline costs — embeddings, vector storage, and generation — from corpus size and query volume.

RAG chunking visualizer

Paste a document and watch chunk size, overlap, and strategy change the chunks before you embed.

LLM context window comparison

Count the tokens in any text and check which models it fits, against live context windows.

Tool call & MCP schema builder

Build function-calling parameters once, copy valid JSON Schema for OpenAI, Anthropic, and MCP.

AI chatbot ROI calculator

Turn ticket volume, handle time, and deflection rate into monthly support savings and ROI.