One question, one model, two system prompts. The instruction text is the only variable — edit either side and re-run to see exactly how much of an answer comes from the prompt rather than the question.
Ask a question and the numbers fill in as the answers arrive.
Your key stays in this tab. It lives in a JavaScript variable — never written to
localStorage, never sent anywhere except api.anthropic.com straight from your
browser, and gone the moment you reload. Connect one to ask your question, with
your edited prompts, streamed token by token. Without a key everything above still
works: the four stored battles above replay real recorded answers for all four presets.