Shape model behavior.
A hands-on lab for understanding how AI models behave — and how that behavior gets made. Change one thing, run it again, and see what moves: tone, persona, boundaries, values. It's not about using AI to do your work; it's about learning to question and direct the model itself.
Free in your browser — no key needed to start.
Three steps to get going.
Start free.
No key required — pick a free way to run and open a playground. Bring an Anthropic, OpenAI, or Google key when you want bigger models.
Design a behavior.
Pick one lever in a playground — a tone, a persona, a boundary — change it, and watch how the model's output shifts.
Save it to your notebook.
Every draft persists locally — reopen, duplicate, export as JSON.
You already have the instincts.
Whatever you do, you already ask questions, weigh answers, and draw lines. Shape lets you point those skills at a model and see what it actually does.
Play and learn.
Diff mode
One prompt, two configs, side by side. Feel how prompts shape outputs.
Tone dial
Style as a design token. Move dials, watch the prompt rewrite itself.
Persona workshop
Character design for AI. Build a backstory, voice, and blind spots.