Get a better answer by making multiple AIs challenge each other.

AI Spar asks Claude, GPT, and Gemini the same question, finds disagreements and missing points, runs debate rounds, then gives you a synthesis.

Try AI Spar

2 free questions with entry-level models — sign up to access the full model range

Live example

Should I buy a home or keep renting in 2026?

GPT
“You expect to stay in the home 7+ years”

Claude
“You plan to stay 5+ years (transaction costs need time to amortize)”

Synthesis: The rent-versus-buy decision in 2026 hinges primarily on personal circumstances—especially time horizon, financial stability, and local market conditions—rather than on any single metric or abstract rule.

View the full example debate →

When to use AI Spar

Nuanced personal decisions

Technical or product tradeoffs

Fitness & wellness tradeoffs where evidence conflicts

Policy or strategy questions

Reviewing documents or arguments

How it works

Ask one question.

Multiple models answer independently.

AI Spar identifies disagreements and missed points.

Models debate.

You get a synthesis.

More when you have an account

Conversation history — all past debates saved so you can return to them anytime
Follow-up questions — continue the research with full context after the initial synthesis
Share links — generate a shareable link for any debate, like the example above
File attachments — include images or PDFs in your question for the models to analyze
Grounded research — enable live web search so models cite current sources alongside their reasoning
Optional evidence verification — check weak or current factual inputs with targeted evidence review
Advanced/full model choice — pick from the full range of Claude, GPT, and Gemini variants
Bring your own API key (BYOK) — use your own keys to reduce cost or access additional models
API & CLI access — query AI Spar programmatically or from the terminal using personal access tokens

Ready to get a better answer?

Try it now

2 free questions
with entry-level models

Full model range
history & sharing