Question 1

What is PromptHub?

Accepted Answer

PromptHub (https://prompthub.cloud) is an AI prompt engineering studio and multi-model developer platform. It allows prompt engineers and creators to version-control, analyze, optimize, benchmark, and test production prompts across 400+ frontier and open-weights models.

Question 2

Can I use my own API keys (BYOK) on PromptHub?

Accepted Answer

Yes. PromptHub provides client-side encrypted Bring Your Own Key (BYOK) support for OpenAI, Anthropic Claude, Google Gemini, Groq, Mistral, DeepSeek, and OpenRouter. Your credentials remain exclusively in your browser session memory and are never persisted on PromptHub servers.

Question 3

Is PromptHub free to use?

Accepted Answer

Yes. PromptHub offers a generous free tier featuring access to high-efficiency free models via OpenRouter (including Llama, Gemma, Qwen, and Nemotron), full Prompt Studio IDE capabilities, quality scoring, and community discovery.

Question 4

How does the Multi-Model Arena work?

Accepted Answer

The Multi-Model Arena executes your prompt simultaneously across 2 to 4 eligible models, comparing token usage, latency, and response quality side-by-side to find the most cost-effective model for your production workload.

Question 5

Can I generate interactive web apps and portfolios on PromptHub?

Accepted Answer

Yes. PromptHub features an autonomous AI Workspace that lets you describe an application idea in natural language, select visual and architecture directions, and preview, refine, and export live interactive code.