AI writing tool evaluation checklist (2026)

People search 'AI writing tool checklist' after two demos and a Slack thread that says 'they all write fine.' They do all write fine. That is why you need a list that does not start with features. Start with the job, the human who will edit, and the failure mode when the model invents last year's SKU. If you cannot fill those in, you are not evaluating a writer. You are collecting logos.

This is an RFP you can paste into a doc. It is not a lab bake-off and it does not invent review counts. How we rank is the site-wide rubric — workflow fit, implementation weight, failure modes, pricing honesty, week-four habit. The writing ranking is the scored table. The wrappers skip-list is what to do when the candidate is a skin. Read this one before procurement sends a fourteen-row spreadsheet of tone sliders.

1. Name the job before you name the vendor

• What artifact has to exist on Tuesday? A landing-page hero, a first-touch sequence, a 1,800-word post, a polish pass in Gmail, an SEO calendar — pick one. 'Content' is not a job.
• Who writes, who edits, who publishes? If those are the same person, you probably wanted ChatGPT Plus. If they are three people, you wanted a desk or a workflow.
• What already sits in the dock? Plus, Claude, Grammarly, a CMS, Outreach. A new seat has to beat that tab, not a blank page.
• What happens if you buy nothing for 90 days? If the honest answer is 'we keep pasting into ChatGPT,' you do not have a writing-tool problem yet.

Map the job to a shape we already score. Shared brand voice → Jasper. Default brain → ChatGPT. Overlay in every box → Grammarly. Research-to-first-touch → Copy.ai. SEO volume with an editor → Writesonic. Careful long-form → Claude. Governance after security killed the consumer tab → Writer. If two shapes are true, buy the leak first. The marketing-stack ladder is the version of this for a whole desk.

2. Voice, facts, and forbidden claims

• Where do product facts live after the tab closes? A voice card, an infobase, a project file, or 'in the prompt'?
• Can a fifth contractor ignore it? If yes, you do not have a brand system. You have a sticky note.
• What is forbidden — claims, competitors, legal phrases, 'innovative solutions'? Write the list before the trial so you can see whether the tool stored it.
• Who updates the facts when the SKU changes? A tool that cannot name that owner will invent last year's price.

3. The same-week trial (run it twice)

Do not accept a vendor-authored sample. Run the same packet in the incumbent tab and in the candidate, same week, same human scoring what they would ship.

• Packet A — brand: a landing-page hero, three subject lines, and a check that the draft remembered the SKU and avoided a forbidden claim.
• Packet B — GTM: one named-account first touch using a real (non-secret) snippet of context. Time how long setup took before the sentence appeared.
• Packet C — long-form: a 1,200-word outline from notes you already have. Mark where the argument restarted and where a citation was invented.
• Score only what a human would ship. Speed without a ship-ready sentence is a demo.

Jasper vs Copy.ai already uses a version of this one-pager. Steal it. If the candidate refuses to run your brief and wants you to watch their canvas, you learned enough.

4. Privacy, training, and where the work lives

• Is customer or unpublished copy allowed in this tool under your policy? If legal already said no to consumer ChatGPT, a wrapper does not fix that. Writer or a vendor BAAed enterprise seat might.
• Does the vendor train on your prompts by default? Get the current answer from their docs, not a 2023 tweet.
• Where does the draft have to land — Docs, WordPress, Contentful, Outreach, Salesforce? A pretty editor you will export from once is a tax.
• SSO, roles, audit log: required, or theater? If you cannot answer in an audit, do not generate customer-facing copy in a consumer app.

5. Pricing honesty versus the demo

• Is the honest plan a $20 brain, a few-dozen-dollar marketing seat, a four-figure workflow pack, or a quote? Copy.ai pricing is the worked example of a chat row that is not the demo.
• What meters — seats, words, credits, workflows? A cheap seat with a surprise credit pack is not cheap.
• Who will actually log in? Empty Jasper seats are not a bargain. Neither is Growth for headline variants.
• What is the kill price? Write the number at which you churn if week four is quiet. Put it in the ticket.

6. Failure modes and week four

• When it is wrong, is the correction stored (voice, infobase, workflow step) or lost in a thread?
• Does the happy path assume unedited publish? Dock that. Our rankings do.
• Will a skeptical editor still have the tab open after week four? If the honest answer is no, you evaluated a demo.
• What job remains if ChatGPT Plus already sits in the dock? If you cannot name one, you found a wrapper. That skip-list is its own page.

7. RFP questions you can send

• Which model(s) run on the plan you quoted, and can we pin one?
• Where are brand facts stored, and who can edit them without a prompt?
• What is excluded from training on this plan? Link the current DPA / training policy.
• Show the audit trail for a draft: who ran it, what sources, what went out.
• Price the plan we will actually live on — not Chat if the demo was workflows, not Pro if the demo was Business.
• What fails when input is messy? We will bring messy input.
• Name three customers with our job, not our industry logo wall.

Most 'how do we evaluate AI writing tools' tickets are a job ticket, a trial-packet ticket, or a Plus ticket. The word checklist is doing too much work if you skipped the leak.— Aiacent checklist, 2026

Verdict

Do not start from features. Name the job. Run the same brief in the incumbent and the candidate. Store facts where a contractor can find them. Price the plan that matches the demo. Kill anything that cannot survive week four or cannot beat Plus. Then read the writing ranking for the scored desk, how we rank for the site rubric, the wrappers skip-list if the candidate is a skin, and the blog-writing ranking if the artifact is a post.