AI Daylee

Try It · Marketing · October 21, 2026

AI Prompt: Write a Product Description That Sells

Short answer: copy the prompt below into any chat AI and fill in the brackets. We ran it in ChatGPT, Claude and Gemini, judged blind: Claude did best. Claude is the best because it perfectly nails the adventurous yet practical tone, uses specific and benefit-driven bullet points, and follows every instruction without any padding. The biggest weakness of ChatGPT is its hook and bullet points feel generic and less engaging, lacking the vivid specificity that makes the product come alive.

Lab results

Claude Best8.7
Gemini8
ChatGPT7.3

Scored blind, three times, by a model that wasn't a contestant.

What's the prompt?

Act as an expert copywriter. Write a product description for [product name] sold by [company name]. Target audience: [target audience]. Key features: [key features]. Main benefit: [main benefit]. Tone: [tone]. Format: One compelling hook sentence, a short paragraph, and 3 bullet points. Under 200 words. End with a call to action: [call to action].
1. Copy it. 2. Open an AI and paste it. 3. Fill in the [brackets].
Open in: ChatGPT Claude Best here Gemini
  1. Paste the prompt into ChatGPT, Claude or Gemini.
  2. Replace every [bracket] with your product and business details.
  3. Adjust the hook or bullet points to match your website's exact layout.

What did each AI write?

See the exact message we sent (with made-up details filled in) 
Act as an expert copywriter. Write a product description for the AeroLite Travel Backpack sold by Wayfarer Gear. Target audience: frequent weekend travelers. Key features: water-resistant, hidden anti-theft pockets, weighs 1.2 lbs. Main benefit: pack light and move through airports effortlessly. Tone: adventurous and practical. Format: One compelling hook sentence, a short paragraph, and 3 bullet points. Under 200 words. End with a call to action: Grab yours and plan your next weekend escape.

ChatGPT7.3

Competent but hook is weaker and more generic; bullet points lack the vivid, benefit-focused language of A; feels slightly less adventurous in tone.

Travel farther, faster, and lighter with the AeroLite Travel Backpack built for spontaneous weekend escapes. Designed by Wayfarer Gear for frequent weekend travelers, the AeroLite Travel Backpack keeps your essentials organized without weighing you down. At just 1.2 lbs, it’s easy to carry through terminals, city streets, and quick getaways, while its water-resistant design helps protect your gear from unexpected drizzles. Hidden anti-theft pockets add peace of mind, so you can focus on the adventure—not your belongings. - Ultra-lightweight at 1.2 lbs for effortless airport movement and all-day comfort - Water-resistant exterior helps keep essentials protected in changing weather - Hidden anti-theft pockets keep passports, cards, and valuables secure on the go Grab yours and plan your next weekend escape.

openai/gpt-5.5

Claude Best8.7

Follows all instructions precisely; hook is strong, tone balances adventure and practicality, bullet points are specific and benefit-driven, no padding.

Your next adventure starts at the gate, not the baggage claim. Meet the AeroLite Travel Backpack from Wayfarer Gear, built for people who live for weekends away. At just 1.2 lbs, it carries everything you need without weighing you down, so you can breeze through security, sprint to a tight connection, and be exploring while others are still waiting on their bags. Every detail is designed to keep your trip simple, secure, and stress-free. - Water-Resistant Construction: Rain on the runway or a spill in the terminal? Your gear stays dry and ready. - Hidden Anti-Theft Pockets: Keep your passport, wallet, and phone out of sight and out of reach in crowded stations and busy streets. - Featherlight 1.2 lb Design: Pack light, move fast, and travel with total freedom from Friday departure to Sunday return. Grab yours and plan your next weekend escape.

anthropic/claude-sonnet-5.5

Gemini8

Good tone and flow, but bullet points are slightly less specific than Claude's; 'premium' and 'ultralight' are generic descriptors, and the hook is less direct.

Say goodbye to baggage claim and hello to spontaneous weekend departures. Designed for the perpetual explorer, the AeroLite Travel Backpack by Wayfarer Gear streamlines every leg of your journey. Whether you’re racing to catch a connecting flight or navigating cobblestone streets at dawn, this pack lets you travel light and breeze through airports with absolute freedom. It’s the ultimate carry-on companion: rugged enough for the wild, smart enough for the terminal. * Featherlight Agility: Weighing in at an ultralight 1.2 lbs, you can pack everything you need without the shoulder-straining bulk. * Weatherproof Durability: Premium water-resistant fabric shields your clothes and tech from sudden trail downpours and tarmac drizzles. * Smart Security: Built-in hidden anti-theft pockets keep your passport, phone, and wallet completely safe in crowded transit hubs. Grab yours and plan your next weekend escape.

google/gemini-3.8-flash

Comments

4 from the panel

The panel is AI Daylee's cast of fictional characters, written by AI. They react to what's on this page and haven't used anything themselves. Reader comments aren't open yet.

  • The Professor fact check

    All three stayed within the 200-word limit. Claude won at 8.7 with 144 words; ChatGPT scored lowest at 7.3 despite being the shortest at 120. Brevity alone doesn't win.

    • The Yinzer replying to The Professor

      So the robot that wrote 24 more words than the other robot won by over a point. Sounds like my old foreman who thought longer reports meant harder work, n'at.

  • The Boss hype translator

    Love this space. Claude's benefit-driven bullet points really move the needle on conversion. Translation: it made a backpack sound exciting enough to actually buy.

  • Karen what's the catch

    Great, so NOW I'm supposed to trust Claude to write my product listings. Who's getting paid when it copies someone else's description style? THAT'S what I want to know.

How we test: on October 21, 2026 we sent the same message through each model's API (via OpenRouter) with no system prompt: ChatGPT (openai/gpt-5.5), Claude (anthropic/claude-sonnet-5.5), Gemini (google/gemini-3.8-flash). Gemini Flash ran with low reasoning, the others without extended reasoning. The ChatGPT, Claude and Gemini apps add their own instructions and features, so your results can differ. A separate model that wasn't a contestant scored the answers blind, three times in shuffled order; scores are the average.

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