System
No API key needed
Nexim AI Prompt Playground
Test, compare and refine AI prompts across Gemini 3.1, GPT-4.1, DeepSeek R1, Llama 4, Qwen3 and 50+ more models — free, no login required.
1
Choose a provider — Gemini, OpenRouter (free models), or OpenAI
2
Add your API key — stored only in your browser, never on our servers
3
Send a prompt — tweak temperature, compare models, or generate images