Send a single prompt to Claude, GPT, Gemini, Grok, and many more. Watch them stream side-by-side. Know exactly what you're spending.
Send one prompt to multiple models simultaneously. Streaming responses let you watch them race in real time.
Compare different system prompts, temperatures, or models on the same input. Find what works before you ship.
Branch from any message to explore different directions. Keep your best threads without losing context.
Per-query token usage and cost breakdown. Know exactly what each model costs you — down to the fraction of a cent.
Full conversation support with any model. Continue, refine, and iterate without losing your chat history.
Bring your own API keys — no middleman, no markup. Keys are stored securely in your device's Keychain.
Enter API keys from the providers you use. They're stored in your device's secure Keychain — never on our servers.
Craft your prompt once, pick the models you want to compare, and adjust parameters like temperature and max tokens.
Watch responses stream in side-by-side. Branch conversations, tweak prompts, and find the perfect model-prompt combination.
Use your own API keys and pay providers directly at their listed rates. Or subscribe and let us handle everything.
Download PromptForge and start comparing AI models today. iPhone and iPad — one universal app.