NEW: Fusion Lab – Fuse multiple AI responses into one answer. No subscription needed — just fund your keys.
→MCP Testing Lab – See Claude connect to live data sources in real-time!
→Compare prompt results across Llama, Qwen, Gemma, GPT-5, Claude 4.5, and Gemini 3 – side by side. Then fuse them into one answer with the Fusion Lab.
Hugging Face offers free API access – no credit card required. Get your free token and start experimenting immediately.Get your free token →
Tokens are stored in browser local storage only—never on our servers. No registration required. No cookies. Your prompts, uploaded files, and responses never leave your browser—we don't store any of your data. Click "Clear Session" to remove all tokens when done. For maximum security, use Incognito/Private mode.
Test up to 5 models on the same prompt
Fuse multiple responses into one synthesized answer
Llama, Qwen, Gemma, GPT, Claude, Gemini & more
Bias, Toxicity, Safety, Hallucinations, PII & more
Upload documents as context for your prompts
Compare costs for all 26 models at a glance
Run up to 5 models, then fuse all their responses into one synthesized answer. Model Council is live — $200/month on a MAX Plan. We do the same thing for pennies. Just fund your API keys.
Use your own API keys — pay only for usage
Mix proprietary and open source models freely
Comprehensive cost chart for all 26 models
Troubleshoot API key issues before running tests in the lab or using keys in your own projects.
Check if models are online and available
Test if YOUR API keys are valid and working
See Claude connect to live data sources in real-time using Anthropic's Model Context Protocol. Compare Claude with and without MCP to see the difference.
Side-by-side Claude comparison
Compare Claude vs other models