When Results Matter,One AI Answer Is Just a Draft.
FiveSages puts five frontier AI models face to face into structured debate — to challenge assumptions, expose blind spots, discover hallucinations, and refine each other’s reasoning, before you get a response you can trust.
- Pay only when you use it · No subscription
- UK&EU-hosted · GDPR-compliant
Frontier models, debating side by side
- OpenAIAvailable
- AnthropicAvailable
- GeminiAvailable
- xAIAvailable
- DeepSeekAvailable
A Real Session, Fast-Forwarded
Onboarding the composer, uploading a document, asking a question, and watching five frontier models draft, debate, improve, and synthesize. Roughly 90 seconds, end-to-end. Loops automatically.
The Risk of a Single Perspective
Modern AI systems are powerful and confident.
But confidence is not verification.
A single model can overlook assumptions, miss edge cases, and present incomplete reasoning with high certainty.
When financial, legal, academic, or strategic decisions are at stake, one perspective is rarely sufficient.
Important decisions deserve structured challenge.
Collective AI Intelligence, By Design
FiveSages introduces structured multi-model deliberation into AI reasoning.
Independent models review, challenge, and refine each other’s conclusions before a final answer is delivered.
The result is not a louder answer. It is a tested one.
FiveSages acts as a decision-protection layer between you and unchallenged AI output.
Structured Multi-Model Deliberation
A four-step protocol the panel follows on every session — not a single API call dressed up.
Independent Drafts
You select up to five frontier AI models. Each produces a full, independent response to your prompt and attached materials, with no awareness of the others.
Debate & Refinement
Models examine each other's drafts, identify weaknesses, and challenge assumptions. They respond to criticism, strengthen arguments, and revise conclusions.
Improved Responses
After one or more rounds of deliberation, each model produces a new final response that incorporates the perspectives gained during the debate.
Synthesis (Optional)
You may select one model to generate a single structured synthesis that reflects the outcome of the deliberation across the panel.
Every objection, every revision, every cited passage — preserved with the session. You read how the answer was reached.
Even AI Models Improve Under Challenge
After every debate round, participating models publish structured self-assessments. Read them. Aggregate them. Decide for yourself.
Average self-reported improvement that participating models attribute to the structured debate round, across published assessments.
Average of all model statements
Improvement percentages are extracted, unmodified, from structured self-assessments generated by the participating AI models. Numbers vary by domain, complexity, and rounds requested.
Deliberation Across Critical Domains
Each persona ships with domain-tuned prompts and panel rules. Pick a vertical to see how the protocol bends to your work.
Legal
For lawyers and in-house counsel reviewing risk before filing.
“Stress-test this NDA against the 2024 EU Trade Secrets directive — flag any clause likely to be unenforceable in France.”
Health
For clinicians and patients comparing treatment reasoning.
“Compare adjuvant therapy options for stage II colon cancer in a patient with deficient mismatch repair — list disagreements.”
Finance & Tax
For analysts and CFOs validating high-stakes capital decisions.
“Should we hedge €20M USD exposure with a forward, options collar, or natural hedge given current rate volatility?”
Business & Strategy
For founders and operators pressure-testing major moves.
“Is the 1.5× participating-preferred term in this Series A acceptable given our 18-month runway and revenue trajectory?”
Research & Education
For researchers and graduate students hardening hypotheses.
“Critique the methodology of this RCT on intermittent fasting — would the conclusions hold under a Bayesian re-analysis?”
Personal Decisions
For high-stakes individual choices that affect years of life.
“Help me weigh accepting a Berlin job offer vs. staying in Lisbon — model tax, relocation, and career trajectory across 5 years.”
Pay Only for the Deliberation You Actually Run
No monthly seat. Use a single model on a quiet day; convene the full panel when a decision warrants it.
One model · one round
per session · estimated
A standard model drafts and reviews its own answer once. Useful for routine questions where you just want a sanity check.
Three models · one debate round
per session · estimated
A panel of three frontier models drafts independently, then challenges each other once. Surfaces disagreements before you act.
Five models · debate + synthesis
per session · estimated
Five models, full cross-challenge, optional synthesis. The protocol you reach for on contracts, treatments, and capital decisions.
- No subscription · billed per session
- Transparent ledger · every charge itemised
- Transparent international billing · VAT-compliant invoices
Estimates assume a typical-length session (≈ 1–2k input tokens, ≈ 800–2k output tokens per model, per round). Actual cost is computed from real token usage at provider rates plus a small platform multiplier; every line item is visible in your credits ledger before you pay.
Built for Decisions You Can Stand Behind
Where your data lives, who can see it, and how to take it back — all answered before you click sign up.
Hosted in the UK and EU
Your data is processed and stored in secure data centres in the UK and the EU. We tell you exactly where, and we don't move it without your consent.
Transparent provider choice
Every model shows its hosting region. If you ever choose to use a model hosted outside the UK or EU, you give explicit consent first — and can revoke it at any time.
Encrypted end to end
All your content is encrypted both in transit and at rest. We never train any model on your data, and you can delete it whenever you want.
DPA & sub-processor list
Standard Contractual Clauses available on request. We publish our sub-processor list and retention policy openly — what we keep, why, and for how long.
Questions We Hear in Every Onboarding Call
Short answers, with links to the full policies and pricing where you should verify them.
How is FiveSages different from just paying for ChatGPT or Claude?
Do I have to commit to a monthly plan?
How much does a typical debate cost?
Where is my data stored, and who has access?
What happens if I select a model hosted outside the EU?
Can I use FiveSages for legal, medical, or financial decisions?
Which models are available today?
Can I bring my own API keys?
Do you offer a Data Processing Agreement and sub-processor list?
Can I export the full debate transcript?
Still have a question? Contact us.
Before you act on an AI answer, ask who challenged it.
Open a session, pick the panel, and watch five frontier models audit each other before a decision touches your work.
Pay only for what you run · No subscription · Cancel any time.