What your AI missed
could cost you the case.
DiffMind runs your prompt across GPT-5, Claude, Gemini, and other leading models in parallel — so you see where they agree, where they disagree, and what one model caught that the others missed.
Free forever plan · No credit card required
Reviewing Section 4.2
Indemnification clause appears standard. No major issues identified.
Reviewing Section 4.2
The term "Affiliates" is not defined elsewhere in the agreement. This could unintentionally extend liability to subsidiaries not contemplated by the parties.
Reviewing Section 4.2
Clause is enforceable under both NY and English law. Recommend confirming choice-of-law section.
Illustrative example. Actual outputs vary by prompt and model.
Single-AI review has a blind spot you cannot see.
In 2023, a New York attorney was sanctioned after submitting a brief with fabricated case citations generated by ChatGPT. The model invented cases that did not exist. He had no second opinion to catch it. The case — Mata v. Avianca — became required reading in legal ethics CLEs across the United States.
The deeper problem is structural. When a single model reviews a 60-page agreement and reports "no major issues," there is no second pair of eyes. You are signing off on the model's confidence, not on actual cross-verification. A model cannot tell you what it missed — by definition.
Your client is not paying you to bet that the AI got it right. They are paying for certainty. A single AI model cannot give you that. By design.
Six independent AI models. One verified answer.
DiffMind is built on the principle that no single model can verify itself. So we run several at once.
Run in parallel
Send one prompt. GPT-5, Claude, Gemini, and other leading models answer simultaneously — each working independently, with no knowledge of what the others said.
See where they disagree
Differences between models are exactly where risk lives. When five models agree on a clause and one flags it, that is the moment that deserves your attention.
Verify before you sign off
You retain full professional judgment. DiffMind does not replace your review — it gives you the multi-model perspective that no single AI tool can offer.
See it in action
Forty-six seconds. Three models. One verified answer.
Watch a real prompt run across multiple models in parallel — and see how the disagreements between them surface what one model alone would have missed.
No credit card required
How it works
From one prompt to verified answers — in three steps.
DiffMind is a general-purpose multi-model AI platform. The same workflow shown below applies to contract review, case law verification, legal drafting, and any work where a single point of failure is unacceptable.
Send one prompt. See multiple models answer side by side.
Choose your layout — 1, 2, or 3 columns, or 2×2 / 2×3 grid. Each model answers independently in its own panel. No copying, no pasting, no switching tabs.
Pictured: GPT-5.4, Gemini 3.1 Pro, and Claude Sonnet 4.6 ready to receive the same prompt.
One click surfaces what each model added — and where they disagree.
The One-Click Summary highlights each model's strongest contribution and flags the points where models diverge. The disagreements are where you focus your review.
Shown: a research example. The same workflow applies to contract review, case law verification, and legal drafting.
Choose from 41+ models. Build the combination that fits the task.
The Model Plaza gives you flagship models from OpenAI, Anthropic, Google, and others — alongside specialized models for specific reasoning styles. Pick the lineup that matches the work in front of you.
Pictured: the OpenAI section of the Model Plaza, including GPT-5.4, GPT-5.2 Thinking, GPT-4.1, and GPT-4o.
No credit card required
Built for the work that cannot afford a single point of failure.
Contract review across jurisdictions
Cross-jurisdictional clauses read differently in different legal traditions. Run a draft through models trained on different data distributions to catch what one might miss.
Case law and citation verification
Before you cite it, verify it across models. If one model can confirm a case and another cannot, that is a signal worth checking.
Cross-border legal drafting
Drafting in English for a non-English party? Compare phrasing across models to find language that reads naturally in both legal cultures.
Internal compliance and risk memos
For in-house counsel: get three different angles on the same regulatory question before sending the memo upstairs.
Tools built on one model cannot cross-verify themselves.
Single-Model AI Tools
- — One model. One perspective. One blind spot.
- — You cannot tell what the model missed.
- — Cross-verification requires manually pasting your prompt into 3 different products.
- — Fixed to whichever model the vendor chose for you.
DiffMind
- ✓ Up to 6 leading models, in parallel, on every prompt.
- ✓ Disagreements between models surface automatically.
- ✓ One workflow, one history, one place — no copy-pasting.
- ✓ GPT-5, Claude, Gemini, and 40+ more — choose the combination that fits the task.
Your work stays your work.
- ✓ Powered by enterprise APIs from OpenAI, Anthropic, and Google. Your conversations are not used to train AI models.
- ✓ You can delete your conversations and uploaded files at any time.
- ✓ Your data belongs to you. Read our privacy policy for full details.
Start free. Upgrade only when you need more.
The cost of one missed clause can exceed a year of any plan.
Free
For trying the multi-model workflow
- ✓ 300 credits to start
- ✓ Unlimited use of free models after credits
- ✓ Up to 6 models in parallel
- ✓ 10 MB file uploads (3 files / session)
- ✓ Basic memory
Plus
For regular cross-verification work
Billed $155 annually
- ✓ 10,000 credits / month
- ✓ All models including flagship tier
- ✓ Up to 6 models in parallel
- ✓ 50 MB file uploads
- ✓ Web search, prompt enhancement, one-click summary
- ✓ Enhanced memory
Pro
For heavy daily multi-model use
Billed $309.90 annually
- ✓ 25,000 credits / month
- ✓ All models including flagship tier
- ✓ Up to 6 models in parallel
- ✓ 100 MB file uploads
- ✓ Advanced memory
- ✓ Early access to new features
All plans include the multi-model cross-verification engine. No credit card required for Free.
Frequently asked questions
How is this different from just using ChatGPT, Claude, or Gemini directly?
Each of those is a single model. DiffMind runs your prompt across all of them at once and surfaces where they agree and disagree. The cross-verification is the product — not the individual models.
Are my conversations used to train AI models?
No. DiffMind is built on the API platforms of OpenAI, Anthropic, and Google — not the consumer ChatGPT or Claude.ai products. These API tiers do not retain or train on customer data by default. DiffMind itself does not use your conversations to train any models.
What about client confidentiality and privilege?
Confidentiality and privilege obligations always remain with you. DiffMind processes your inputs through enterprise AI APIs that do not retain or train on customer data by default, and you can delete your conversations at any time. Whether using any AI tool — including DiffMind — is appropriate for a particular matter is a judgment for the practitioner under their applicable rules of professional conduct.
How is this different from Harvey, CoCounsel, Spellbook, or Lexis+ AI?
Those tools are vertically focused on legal workflows and are built on a single underlying model. DiffMind is a general-purpose multi-model platform — its core value is cross-verification across multiple leading models on every prompt. The two approaches are complementary, not equivalent. If you want a vertical legal product, those exist. If you want every prompt verified across multiple independent models, that is what DiffMind does.
Can I delete my data?
Yes. You can delete individual conversations, uploaded files, or your entire account at any time.
Which models are supported?
GPT-5 series (including GPT-5.4, GPT-5.2 Thinking, GPT-4.1, GPT-4o), Claude Sonnet 4.6 and Opus, Gemini 3.1 Pro, and 30+ others — over 41 models in total. The lineup updates as new flagship models are released.
Is this a legal-specific product?
No. DiffMind is a general-purpose multi-model AI platform. It works exceptionally well for legal work because legal work has high cost-of-error and benefits from cross-verification — but the same engine serves researchers, consultants, and other professionals.
Can my law firm get an enterprise account?
Team and enterprise arrangements are handled case by case. Contact us through the support email below to discuss multi-seat licensing and any procurement requirements.
Do I need a credit card to start?
No. The Free plan requires no payment information.
Stop trusting one AI.
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