Claude General

Vendor Claim Prompts: 6 for Separating Evidence From Assertion

Anthropic gave an outside body access to its transcripts. Most labs publish a document grading their own work. Both get described as a safety commitment, and only one can produce a finding the company did not want. These six prompts are for reading any vendor claim — safety, benchmark, uptime, security — and working out which kind it is.

⌨️ 6 prompts 🕐 Updated Sep 12, 2026

💡 How to use these prompts: Replace everything in [BRACKETS] with your specific details before sending. Click Copy to copy any prompt to your clipboard instantly.

Ask what this claim cost them

Claims that cost nothing are marketing. Claims that cost something are evidence.

Here is a vendor announcement: [PASTE]

For each substantive claim, tell me what it cost the company to make it:
- Nothing, it describes work already done
- Money, they gave something up
- Risk, it could produce a finding they did not want

Rank the claims by cost. The expensive ones are the credible ones.

Find the measurement behind the number

A number without a method is a number someone chose. The last line stops a confident guess.

A vendor claims: [PASTE THE CLAIM AND ANY FIGURE]

Tell me:
- What was actually measured
- Who measured it
- What the comparison baseline was, and whether it was current
- What the number does not tell me

If you cannot establish the methodology from what I gave you, say that rather than inferring it.

Check whether anyone else could verify it

Unverifiable is not the same as false. It is worth knowing which you are dealing with.

Here is a claim: [PASTE]

Tell me whether a third party could check it today, and how. If nobody outside the company can verify it, say so plainly.

Then tell me what the vendor would have to publish for it to become checkable.

Read the disclosure against interest

A disclosure against interest is usually the most credible line in any announcement, because it costs something.

This announcement includes something that appears to work against the company: [PASTE]

Tell me:
- Why they might publish it anyway
- Whether it is more credible than the promotional claims, and why
- What it implies that is not stated
- What would make me doubt it

Reason from incentives. Do not assume good faith or bad faith.

Draft the questions they would rather not answer

What a vendor has refused to build tells you more than what they have built.

I am evaluating this vendor: [NAME AND WHAT THEY CLAIM]

Write the questions a sceptical buyer would ask. For each, tell me what a good answer sounds like, what an evasive one sounds like, and what silence would mean.

Include anything about enforcement, independence and what they have declined to ship.

Compare two vendors on the same terms

Vendors choose the measures that flatter them. Finding where two claims are incommensurable is more useful than a verdict.

Here are announcements from two vendors: [PASTE BOTH]

Compare them on what each actually committed to versus described, which claims are checkable, and what each disclosed that the other did not.

Do not pick a winner. Tell me where they are not comparable.