Tools
Free tools
No key and no account needed. Everything reads the same live catalog the API bills from.
LLM cost calculatorPick any chat model, set the tokens of a request, read what it costs and how many requests $10 buys.Price indexEvery model's price per million tokens next to the developer's list price. Sortable, downloadable as JSON and CSV.Compare modelsFlagship pairs side by side: input, cached input, output, context window and one worked chat turn.PlaygroundChat with any model in the browser on your key; every reply shows its tokens and cost.StatusThe API and the Claude, GPT and Gemini routes from real requests, hour by hour, 30 days back. Public JSON too.Verify a statementCheck the Ed25519 signature on a monthly statement or a response receipt in your browser.
From code, no key
GET https://api.relayswitch.io/v1/catalog returns every model with its price, list price, context window and tags. POST https://api.relayswitch.io/v1/estimate with input_tokens and output_tokens prices that request on every model. GET https://api.relayswitch.io/v1/status is the status feed.