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small business · ~20 min

Draft a vendor or supplier negotiation email from your real terms, volume, and alternatives—without inventing BATNA, competitor quotes, or discounts.

Last verified: 2026-09-08

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.

Top picks

Best Overall

Claude

Firm-but-respectful tone; won’t invent leverage if forbidden.

Open Claude

Best Free

ChatGPT Free

Solid first draft of ask + rationale.

Open ChatGPT

Best Power-User

Claude + second pass in ChatGPT

Draft in one; invented-leverage / hostility check in the other. Numbers come from your PO history and quotes—not from the model.

Open Claude

Protocol

  1. Step 1 of 5

    Assemble the negotiation pack (5–8 min).

    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.

  2. Step 2 of 5

    Lock no-invented-leverage rules.

    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.
  3. Step 3 of 5

    Fill pack (step 3a) and generate (step 3b).

    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.
  4. Step 4 of 5

    Second-model tone + leverage check (5 min).

    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.
  5. Step 5 of 5

    Human send.

    Fill gaps. Remove any implied switch threat if you cannot follow through. Send from your account; log the ask.

When not to

  • Do not invent competitor quotes, “industry standard” discounts, or fake volume commitments.
  • Not legal advice for contract amendments—have counsel review material term changes.
  • Skip if you lack current terms and volume facts—pull the PO history first.
  • Do not paste confidential bid files from other vendors if NDAs forbid it.

Dated sources

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