Best Overall
Claude
Firm-but-respectful tone; won’t invent leverage if forbidden.
Open Claudesmall business · ~20 min
Not legal advice. Use only terms, volume, and alternatives you actually have. Do not invent BATNA, competitor quotes, or discounts.
Still choosing renegotiate vs switch vs dual-source? Start on the small business (SMB) decision trees hub, then draft from real terms and volume.
Best Overall
Firm-but-respectful tone; won’t invent leverage if forbidden.
Open ClaudeBest Free
Solid first draft of ask + rationale.
Open ChatGPTBest Power-User
Draft in one; invented-leverage / hostility check in the other. Numbers come from your PO history and quotes—not from the model.
Open ClaudeStep 1 of 5
Current price/terms/lead time, volume you actually buy (trailing or committed), what you want to change, alternatives you truly have (other quotes, bring in-house, delay purchase)—or NONE—and constraints (contract end date, quality requirements). No fake competitor names.
Step 2 of 5
Paste the rules first so the model cannot mint a BATNA, competitor quote, or “industry standard” discount.
Copy-paste prompt
Help me draft a vendor/supplier negotiation email (volume, pricing terms, and/or lead time). Hard rules: - Use ONLY facts, volumes, terms, and alternatives I provide. Do not invent BATNA, competitor prices, market benchmarks, discounts “others get,” or threats to switch unless I explicitly authorize that language with real alternatives. - No bluffing. If I have no alternative, do not imply one—mark [MISSING alternative]. - Tone: professional, specific, collaborative; clear ask; one concrete next step. - Not legal advice; do not rewrite contract clauses as binding commitments. Confirm in one sentence, then wait for my pack.
Step 3 of 5
Paste real terms and volume, then send the generate command.
Paste pack
VENDOR / SUPPLIER: [ ] WHAT WE BUY: [ ] CURRENT PRICE / UNIT TERMS: [ ] CURRENT LEAD TIME / MOQ / PAYMENT TERMS: [ ] VOLUME WE ACTUALLY BUY (period): [ ] WHAT I WANT TO CHANGE: [price / payment terms / lead time / MOQ / other] TARGET I CAN DEFEND (optional—only if real): [or NEED FACT] ALTERNATIVES I ACTUALLY HAVE: [other quote / delay / redesign / NONE] CONSTRAINTS: [contract dates, quality must-haves] RELATIONSHIP NOTES (factual): [ ]
After you send the filled pack, copy the Generate command in the next box and paste it into the SAME chat so the AI runs the decision tree / produces the output.
Generate command — copy and send this next (same chat)
Draft Direct and Collaborative versions (same facts). Subject lines. Bullet the ask. List [NEED FACT] / [MISSING]. Do not invent leverage.
Step 4 of 5
In the other tool, paste the draft plus your fact pack:
Second-model check
Here is a vendor negotiation email from another assistant plus my fact pack. Find: (1) invented BATNA/competitor/discount claims, (2) hostility or ultimatums I didn’t authorize, (3) wrong numbers vs my pack, (4) vague asks that should be quantified from my facts only. Return only corrections.
Step 5 of 5
Fill gaps. Remove any implied switch threat if you cannot follow through. Send from your account; log the ask.