Multi-model. Zero Latency. Maximum Agency.
Escape the single‑model trap. Think in parallel. Catch hallucinations.
For power-users who need more intelligence, speed, and absolute control.
The power-user's AI interface for absolute control: compare and merge models, refine outputs, and decide with confidence.
Escape vendor lock-in, own your data, and stop trusting hallucinations. You are in control now.
01
Recent Updates
View all →Access the latest models including Claude Opus 4.5, Gemini 3 Pro, Nano Banana Pro, Kimi-K2.5 and GPT-5.2 also with Big-AGI Open on GitHub
The power-user's AI interface
Zero Latency
Local-first
Snappy I/O
Advanced Personas
Absolute Control
Modes
Trusted by power-users
Physicians, problem solvers, and AI researchers choose Big-AGI for critical work.
“Your work is literally saving lives.”
I use your program to access LLMs to doublecheck my clinical decision making in an ER setting. Where I get value is assimilating large amounts of data into digestible, 100% correct summaries and medical decision making trees.
I've seen almost zero errors from a well-prompted model.
I don't work without your product.
John, MD
ER Physician
“Big-AGI totally dominated the Science Olympiad.”
I have no experience in science Olympiads. Let alone hovercrafts. But with Big-AGI, all the suggestions, design choices are already top notch national winning level design.
Consensus across models = gold, Disagreement = where to dig deeper
All models have their own winning specialties, you don't have to choose one
Fred L.
Parent & Maker
“The best option I could find.”
Big-AGI feels like it has the most carefully thought through design. And it's open source! TypingMind [...] advanced features feel buggy or have non-intuitive design.
Most carefully thought through design.
BYO keys is non-negotiable.
Slava
AI Researcher & GitHub Sponsor
“It's clear this has been a labor of love, and stands head and shoulders above other projects out there.” - OG supporter
Join ER doctors, lawyers, developers, and founders who use Big-AGI daily.
Get started in 60* seconds
Bring your API keys. We handle the rest.
* take your time: more APIs = smarter team
Launch
Works instantly in your browser - can be installed too
Connect APIs
Add your API Keys for direct unfiltered zero-lag access
Enjoy
Run multiple models, catch hallucinations, act stronger
Open Source, Free and Pro.
Independent, non-VC funded. Pro subscriptions power all development, including the free and open-source tiers.
Free
$0
/month
Pro
$10.99
/month
Need a Business plan? Contact us for custom deployments, team management, and SLA guarantees.
All plans include BYO API keys. Your data stays yours.
Ready to be in Control?
Join ER doctors, lawyers, developers, founders, and top experts who use Big-AGI daily to create and decide with confidence.
BIG-AGI
Resources