Multi-Model, Zero Latency, Maximum Control.
For AI experts who need more intelligence, speed, and absolute control.
Escape the single‑model trap. Think in parallel. Catch hallucinations.
The expert interface for working with AI models: tune any option, compare and fuse answers, decide with confidence.
Escape vendor lock-in, own your data, and stop trusting hallucinations.
01
Connect every provider + local models
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.
Feature Packed
Depth where it counts. Precise controls, multi-model power, a transparent and resilient core.
Claude Fable 5
Direct Connect
Effort
Search
Dynamic filtering
Skills
Precise model controls
Every model tuned to spec. Dial in effort, temperature, verbosity, reasoning budget, search and tools. Per request, per persona.
-> 1,080+ fully controllable models
Roadmapper
CONTEXT
Personas with context
Codify expertise once. A persona carries its own instructions, attached docs and images, memory, a fixed model, parameters, custom chat reinforcements, custom merges, and voice.
-> your portable experts
Fusion of models
Beam's Merge combines replies from many models into one answer. Fuse, Guided, Compare, or your own merge prompt.
-> one answer, many minds
Beam, every model at once
Run 2 to 24 models anytime during the chat, in parallel, streaming live. See where they agree and where they diverge. Disagreement is signal.
-> explore faster, choose wiser
Streaming request
Provider timeout
Auto-retry 2 / 3
Recovered
Optimized & Resilient
Built to keep going. Automatic recovery, explicit errors, route-arounds and retries. Your work survives provider turbulence.
AI Inspector · request
Transparent requests
Nothing hidden. The AI Inspector shows the exact request leaving your browser: model, parameters, tokens, cost. Before and after it runs.
Packed with more
Voice calls
Split-pane ×4
Multicast
Multimodal in & out
Diagrams & charts
Branch & fork
0-day models
Keyboard-first
What experts like
Latest models
Zero Latency
Local-first
Fast UX
Advanced Personas
Absolute Control
Modes
No lock-in. Maximum Agency
AI should work for you - not for a vendor. Local-first, transparent, open, and designed so you're the one in control: your models, your keys, your data, your rules.
Jul 1
Anthropic Sonnet 5 support
Gemini Omni Preview support with short video generation
Jun 29
Cerebras ultra-fast inference support: Gemma 4 31B, GPT-OSS 120B, GLM 4.7
Added daily model and provider rankings
Jun 26
OpenAI GPT-5.6 model family with Sol (coding, science, cybersecurity), Terra (balanced), Luna (faster, cheaper)
Alibaba models including Qwen3.7 Max, plus Alibaba-served DeepSeek V4 Pro, GLM-5.2, and Kimi K2.7 Code
Jun 24
Sakana AI official support including Fugu and Fugu Ultra models
Improved resilience to storage issues
Jun 20
New Settings interface
Models: new models indicators, extend OpenRouter reasoning controls
Better controls for Anthropic code execution
Jun 18
Gemini search citations resolve to the actual link rather than an opaque redirect
Pro users can recover deleted chats with the cloud trashcan
Remove older registered devices from the account page
Jun 16
Z.ai GLM-5.2 and Moonshot Kimi K2.7-code support
Note: the access to Fable 5 is still disabled
Jun 9
Anthropic Claude Fable 5 and Claude Mythos support with 1M context
Scratch Chats: search toggle and materialize into full chats
Beam Merge: editable separators, with custom editor
Pop Models
Most popular models, providers, and community servers on Big-AGI.
OpenRouter
·Anthropic
·DeepSeek
·OpenAI
·Moonshot
·AWS Bedrock
·xAI
·Groq
·Sakana
NVIDIA
·SambaNova
·Weights & Biases
·+ community servers and private self-deploys
Get started in 60* seconds
Bring yourAPI Keys- we handle the rest.
* take your time: more APIs = smarter team
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
$9
/month, billed $108/year
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
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