multi-ai — Compare AIs

multi-ai is the fastest way to get answers from multiple AIs at once — and a synthesized "best" final answer.

WHY MULTI-AI?multi-ai is the fastest way to get answers from multiple AIs at once - and a synthesized best final answer.

WHY MULTI-AI?
Different AI models have different strengths. GPT-OSS is fast and free. Claude is great at nuance. Gemini handles long context. Instead of asking each one separately and comparing tabs, ask them all at once in multi-ai. Then let another AI read all the answers and synthesize the most useful conclusion.

FEATURES
- 100% FREE models: GPT-OSS (OpenAI's open-source GPT), Llama 3 & 4, Qwen, plus Gemini Flash and Claude Haiku - usable without payment.
- 4 MODES: Single, Compare, Synthesis (A + B + a third AI that combines them), and Extended (4-5 AIs at once).
- SMART SYNTHESIS: the synthesis column reads every response and gives you a wrap-up - what they agree on, what they disagree on, and a balanced final conclusion.
- 9 LANGUAGES: English, Korean, Japanese, Chinese, Spanish, French, German, Portuguese, Vietnamese - auto-detected.
- BRING YOUR OWN KEY (optional): register your own API key for Claude, GPT, or Gemini and pay the provider directly.
- PRIVACY-FIRST: we don't sell your data and we don't train AI on it. Delete your account anytime.

Stop tab-hopping between AI tools. Ask once, compare, and decide with confidence.
Different AI models have different strengths. GPT-OSS is fast and free. Claude is great at nuance. Gemini handles long context. Instead of asking each one separately and comparing tabs, ask them all at once in multi-ai. Then let another AI read all the answers and synthesize the most useful conclusion.

FEATURES
- 100% FREE models: GPT-OSS (OpenAI's open-source GPT), Llama 3 & 4, Qwen, plus Gemini Flash and Claude Haiku — usable without payment.
- 4 MODES: Single, Compare (two AIs side by side), Synthesis (A + B + a third AI that combines them), and Extended (4-5 AIs at once).
- SMART SYNTHESIS: the synthesis column reads every response and gives you a wrap-up — what they agree on, what they disagree on, and a balanced final conclusion.
- 9 LANGUAGES: English, Korean, Japanese, Chinese, Spanish, French, German, Portuguese, Vietnamese — auto-detected.
- BRING YOUR OWN KEY (optional): register your own API key for Claude, GPT, or Gemini and pay the provider directly.
- PRIVACY-FIRST: we don't sell your data and we don't train AI on it. Delete your account anytime.

Stop tab-hopping between AI tools. Ask once, compare, and decide with confidence.