Free tools

What your stack really costs

List prices are the easy part. These work out what you’d actually pay, from your own usage. No sign-up needed.

AI API costs

Your tokens and requests against every model, with caching and batch discounts.

Input, output and cache prices for 336 models, updated daily.

The lowest-cost models with tools, vision or long context.

The 5.5% credit fee, free model limits and when your own keys are cheaper.

All 15 free models, with what “free” really means.

Pro, Max, Ultra or the API? A calculator from your hours a day.

Every plan, and what Claude or GPT costs on top at API list price.

What each ChatGPT plan gives you in Codex, and the cost on an API key.

What each plan pays for, and when each is cheaper.

Your bill from traffic and compute, and what it costs as you grow.

Your bill from users, projects and storage, including running several products.

Connect your tools and Glow shows every product’s money in, money out and AI bill, day by day.