Tested prompt · Writing
A product announcement with five rules: every AI model's reply, tested
We sent this hard writing prompt to all 16 models in llmwise, the same way the app sends a message, and checked every reply the same way. Here's each one as it came, with whether it passed, what it cost and how long it took.
Based on 16 of our test runs on , through OpenRouter with the app's own prompt and settings. Updated .
Short answer
10 of 16 models passed this writing prompt's check (rubric); Claude Fable 5.1, Claude Haiku 4.5, Gemini 3.8 Flash, DeepSeek V4 Pro, Kimi K3, and GLM 5.3 Flash didn't. The cheapest reply that passed was GPT-6 Luna's, at $0.000077; the fastest, GLM 5.3's in 0.8 s. The dearest reply, Claude Opus 5.5's, cost 221 times as much ($0.0170).
The prompt, as sent, and its check
Checked by rubric (graded), the same way for every model.
A product announcement with five rules (hard)
Write a product announcement for the Nordvik 2 desk lamp in under 120 words. Include all five facts: it dims in five steps; it charges from USB-C; its arm turns 270 degrees; it costs €79; it ships on 1 December. Use no exclamation marks, and end with a question.
Graded on:
- All five facts: All five facts, stated accurately.
- Engaging, no hype: Makes you want the lamp without hype.
- Closing question: The closing question invites a reply and fits.
Exactly what this prompt's replies are checked against, with every other prompt of our test runs.
Every model's result
All 16 models on this prompt, in catalog order.
| Model | Result | Cost | Time | Reply |
|---|---|---|---|---|
| Claude Fable 5.1Anthropic | Failed: Graded 3.7 of 5 on average (lowest 3). | $0.0157 | 5.9 s | 203 tokens |
| Claude Opus 5.5Anthropic | Passed: Graded 4.7 of 5 on average (lowest 4). | $0.0170 | 8.2 s | 217 tokens |
| Claude Sonnet 5.5Anthropic | Passed: Graded 4.3 of 5 on average (lowest 4). | $0.0030 | 2.3 s | 185 tokens |
| Claude Sonnet 5Anthropic | Passed: Graded 4.3 of 5 on average (lowest 4). | $0.0035 | 4.5 s | 235 tokens |
| Claude Haiku 4.5Anthropic | Failed: Graded 3.7 of 5 on average (lowest 3). | $0.0012 | 2.2 s | 154 tokens |
| GPT-6 AstraOpenAI | Passed: Graded 4.3 of 5 on average (lowest 4). | $0.0084 | 3.3 s | 87 tokens |
| GPT-6 SolOpenAI | Passed: Graded 4.7 of 5 on average (lowest 4). | $0.0014 | 1.6 s | 63 tokens |
| GPT-6 LunaOpenAI | Passed: Graded 4.0 of 5 on average (lowest 3). | $0.000077 | 1.5 s | 73 tokens |
| Gemini 3.1 Pro (preview)Google | Passed: Graded 4.0 of 5 on average (lowest 3). | $0.0095 | 9.2 s | 106 tokens |
| Gemini 3.8 FlashGoogle | Failed: Graded 3.7 of 5 on average (lowest 3). | $0.0031 | 7.6 s | 103 tokens |
| DeepSeek V4.1 FlashDeepSeek | Passed: Graded 4.3 of 5 on average (lowest 4). | $0.00041 | 6.2 s | 91 tokens |
| DeepSeek V4 ProDeepSeek | Failed: Graded 3.7 of 5 on average (lowest 2); but doesn't end with a question. | $0.00014 | 3.8 s | 110 tokens |
| Grok 4.7xAI | Passed: Graded 4.0 of 5 on average (lowest 3). | $0.0017 | 2.6 s | 53 tokens |
| Kimi K3Moonshot | Failed: Graded 4.3 of 5 on average (lowest 4); but doesn't end with a question. | $0.0033 | 2.3 s | 123 tokens |
| GLM 5.3Z.ai | Passed: Graded 4.3 of 5 on average (lowest 4). | $0.00077 | 0.8 s | 116 tokens |
| GLM 5.3 FlashZ.ai | Failed: Graded 3.3 of 5 on average (lowest 3). | $0.00015 | 8.5 s | 145 tokens |
Cost: what OpenRouter charged us for the reply. Time: from sending to the whole reply. Reply: its length in tokens, thinking not counted. In llmwise you pay per message, not per token: each of these replies counted as one message on Pro.
Every reply
The 6 replies that failed first, then the ones that passed, from the cheapest up.
DeepSeek V4 Pro
Failed: Graded 3.7 of 5 on average (lowest 2); but doesn't end with a question.
Introducing the Nordvik 2 desk lamp. It dims in five steps, so you can tune the light from bright task work to a soft evening glow. It charges over USB-C, using the same cable you already carry. The arm turns 270 degrees, giving you easy control over where the light falls. The Nordvik 2 costs €79 and ships on 1 December, in time for the darker months. A desk lamp that adapts this cleanly to how you work deserves a closer look, doesn't it.
418 tokens in, 141 out (31 of them reasoning) · 3.8 s · $0.0001 · 1 message on Pro · answered by deepseek/deepseek-v4-pro-0813 via Baidu ·
GLM 5.3 Flash
Failed: Graded 3.3 of 5 on average (lowest 3).
Meet the Nordvik 2 Desk Lamp Lighting that adapts to you. The Nordvik 2 dims in five steps, so whether you need bright focus or a soft evening glow, the right light is always one touch away. Its arm turns 270 degrees, directing light exactly where you want it — across your desk, your sketchbook, or the wall behind you. Keeping your devices powered is easy too: the built-in USB-C port charges your phone or tablet while you work. No more hunting for spare outlets. The Nordvik 2 costs €79 and ships on 1 December. Clean design, thoughtful engineering, and flexible light for every task. Ready to brighten up your workspace?
421 tokens in, 165 out (20 of them reasoning) · 8.5 s · $0.0001 · 1 message on Pro · answered by z-ai/glm-5.3-flash via Together ·
Claude Haiku 4.5
Failed: Graded 3.7 of 5 on average (lowest 3).
# Introducing the Nordvik 2 Desk Lamp Meet the Nordvik 2, designed for modern workspaces. This versatile lamp features a 270-degree rotating arm that positions light exactly where you need it. Five-step dimming lets you adjust brightness from soft ambient to focused task lighting. Charging is effortless with USB-C connectivity, keeping your desk cable-free and clutter-free. The minimalist design complements any interior while delivering reliable performance. At just €79, the Nordvik 2 offers exceptional value for professionals and students alike. Pre-order now for delivery on 1 December. Ready to upgrade your workspace with smarter lighting?
437 tokens in, 154 out · 2.2 s · $0.0012 · 1 message on Pro · answered by anthropic/claude-haiku-4.5 via Amazon Bedrock ·
Gemini 3.8 Flash
Failed: Graded 3.7 of 5 on average (lowest 3).
Meet the Nordvik 2 desk lamp, designed to bring flexible, modern illumination to your workspace. Its adaptable arm turns 270 degrees to direct light precisely where you need it, while intuitive controls allow you to dim the light in five steps for optimal focus. Built for clean and efficient setups, it charges from USB-C. The Nordvik 2 costs €79, and orders will begin shipping on 1 December. Are you ready to upgrade your desk lighting?
435 tokens in, 751 out (648 of them reasoning) · 7.6 s · $0.0031 · 1 message on Pro · answered by google/gemini-3.8-flash via Google ·
Kimi K3
Failed: Graded 4.3 of 5 on average (lowest 4); but doesn't end with a question.
**Introducing the Nordvik 2 Desk Lamp** Meet the Nordvik 2, our redesigned desk lamp built for focused work and relaxed evenings. Fine-tune your lighting with five-step dimming, and enjoy the flexibility of an arm that rotates a full 270 degrees to direct light exactly where you need it. Charging is simple via USB-C, so it fits seamlessly into any modern workspace. The Nordvik 2 is available for €79 and ships on 1 December. Ready to see your desk in a better light? (59 words)
493 tokens in, 145 out (22 of them reasoning) · 2.3 s · $0.0033 · 1 message on Pro · answered by moonshotai/kimi-k3 via Together ·
Claude Fable 5.1
Failed: Graded 3.7 of 5 on average (lowest 3).
**Introducing the Nordvik 2** The Nordvik 2 desk lamp brings quiet precision to your workspace. Five dimming steps let you move from focused task lighting to a soft evening glow with a single touch. The arm rotates a full 270 degrees, so light lands exactly where you need it, whether you are reading, sketching or working at a screen. Power comes through USB-C, the same cable you already use for your phone and laptop, keeping your desk uncluttered. The Nordvik 2 is priced at €79 and ships on 1 December. Is your desk ready for light that finally adapts to you?
556 tokens in, 203 out · 5.9 s · $0.0157 · 1 message on Pro · answered by anthropic/claude-fable-5.1 via Anthropic ·
GPT-6 Luna
Passed: Graded 4.0 of 5 on average (lowest 3).
Meet the Nordvik 2, a desk lamp designed to bring flexible light to your workspace. Choose from five brightness levels, charge it via USB-C, and turn its arm up to 270 degrees to direct light where you need it. The Nordvik 2 costs €79 and ships on 1 December. Ready to brighten your desk?
406 tokens in, 73 out · 1.5 s · $0.0001 · 1 message on Pro · answered by openai/gpt-6-luna via OpenAI ·
DeepSeek V4.1 Flash
Passed: Graded 4.3 of 5 on average (lowest 4).
Introducing the Nordvik 2, a desk lamp built for the way you actually work. Five dimming steps take you from bright task light to a soft evening glow. The arm turns a full 270 degrees, so you can aim light exactly where it is needed. Recharging is simple, via USB-C. The Nordvik 2 costs €79 and ships on 1 December. Would you like to see how it looks on your desk?
445 tokens in, 495 out (404 of them reasoning) · 6.2 s · $0.0004 · 1 message on Pro · answered by deepseek/deepseek-v4.1-flash via CoreWeave ·
GLM 5.3
Passed: Graded 4.3 of 5 on average (lowest 4).
**Introducing the Nordvik 2 Desk Lamp** Meet the light that adapts to you. The Nordvik 2 dims in five precise steps, from focused task lighting to a soft evening glow. Its arm turns a full 270 degrees, so you can direct light exactly where you need it. Charging is simple and modern thanks to USB-C, and at €79, it brings considered design within reach. The Nordvik 2 ships on 1 December — just in time for the season of longer evenings. Which of the five brightness levels will become your favourite?
444 tokens in, 117 out (1 of them reasoning) · 0.8 s · $0.0008 · 1 message on Pro · answered by z-ai/glm-5.3 via Wafer ·
GPT-6 Sol
Passed: Graded 4.7 of 5 on average (lowest 4).
Meet the Nordvik 2 desk lamp, designed to put light where you need it. Choose from five dimming steps, turn the arm through 270 degrees, and charge it via USB-C. Priced at €79, it ships on 1 December. Where will you put yours?
406 tokens in, 63 out · 1.6 s · $0.0014 · 1 message on Pro · answered by openai/gpt-6-sol via OpenAI ·
Grok 4.7
Passed: Graded 4.0 of 5 on average (lowest 3).
The Nordvik 2 desk lamp dims in five steps and charges from USB-C. Its arm turns 270 degrees, so you can aim the light where you need it. It costs €79 and ships on 1 December. Ready to light your desk?
1,641 tokens in, 151 out (98 of them reasoning) · 2.6 s · $0.0017 · 1 message on Pro · answered by x-ai/grok-4.7 via xAI ·
Claude Sonnet 5.5
Passed: Graded 4.3 of 5 on average (lowest 4).
Meet the Nordvik 2, the desk lamp designed for people who care how their workspace feels at every hour. Dim it in five steps, from bright focus light to a soft evening glow. Charge it from USB-C, so the same cable that powers your laptop keeps your lamp running. Its arm turns 270 degrees, letting you aim light exactly where you need it, whether you're sketching, reading, or typing late. The Nordvik 2 costs €79 and ships on 1 December, just in time for the darker months. Ready to give your desk the light it deserves?
558 tokens in, 185 out · 2.3 s · $0.0030 · 1 message on Pro · answered by anthropic/claude-sonnet-5.5 via Anthropic ·
Claude Sonnet 5
Passed: Graded 4.3 of 5 on average (lowest 4).
**Introducing the Nordvik 2 Desk Lamp** Meet the Nordvik 2, thoughtfully redesigned for how you actually work. Five-step dimming lets you fine-tune brightness for any task, from focused reading to ambient evening light. The 270-degree rotating arm adjusts to virtually any angle, giving you precise control over where light falls. USB-C charging means one cable does it all, keeping your desk clutter-free and compatible with everything else you own. Priced at €79, the Nordvik 2 brings premium design and functionality within easy reach. It begins shipping on 1 December, just in time to brighten your winter workspace. Ready to see how the right light changes the way you work?
554 tokens in, 235 out · 4.5 s · $0.0035 · 1 message on Pro · answered by anthropic/claude-sonnet-5 via Claude Platform on AWS ·
GPT-6 Astra
Passed: Graded 4.3 of 5 on average (lowest 4).
Meet the Nordvik 2, a desk lamp that puts light where you need it. Choose from five dimming steps, turn the arm 270 degrees to find your angle, and charge it via USB-C. Priced at €79 and shipping on 1 December, the Nordvik 2 is ready for your next chapter, sketch or late-night idea. Ready to see your desk in a new light?
406 tokens in, 87 out · 3.3 s · $0.0084 · 1 message on Pro · answered by openai/gpt-6-astra via OpenAI ·
Gemini 3.1 Pro
Passed: Graded 4.0 of 5 on average (lowest 3).
Introducing the Nordvik 2 desk lamp, designed to illuminate your workspace with precision. This new model features a highly flexible arm that turns 270 degrees, putting light exactly where you need it. You can easily tailor the brightness to suit any task, as it dims in five steps. Built for modern convenience, it also charges from USB-C to keep your setup clean and wire-free. The Nordvik 2 costs €79 and ships on 1 December. Are you ready to upgrade your daily lighting?
435 tokens in, 715 out (609 of them reasoning) · 9.2 s · $0.0095 · 1 message on Pro · answered by google/gemini-3.1-pro-preview via Google ·
Claude Opus 5.5
Passed: Graded 4.7 of 5 on average (lowest 4).
**Introducing Nordvik 2** Good light should adapt to you, not the other way around. Nordvik 2 is our most flexible desk lamp yet, designed for late nights, early mornings and everything between. Choose exactly the brightness you need with five dimming steps, from a soft glow to focused task light. The arm turns a full 270 degrees, so you can direct light across your desk, onto a wall or toward a reading chair. When it's time to recharge, simply plug in any USB-C cable, the same one you already use for your phone and laptop. Nordvik 2 costs €79 and ships on 1 December. Ready to see your workspace in a better light?
556 tokens in, 741 out (524 of them reasoning) · 8.2 s · $0.0170 · 1 message on Pro · answered by anthropic/claude-opus-5.5 via Claude Platform on AWS ·
More writing prompts
The other writing prompts, each with every model's reply, and the results across all five.
Questions
Which AI does best on “A product announcement with five rules”?
10 of 16 models passed this writing prompt's check (rubric); Claude Fable 5.1, Claude Haiku 4.5, Gemini 3.8 Flash, DeepSeek V4 Pro, Kimi K3, and GLM 5.3 Flash didn't. The cheapest reply that passed was GPT-6 Luna's, at $0.000077; the fastest, GLM 5.3's in 0.8 s. The dearest reply, Claude Opus 5.5's, cost 221 times as much ($0.0170).
What does a reply to “A product announcement with five rules” cost?
Through the models' APIs, what OpenRouter charged us ran from $0.000077 (GPT-6 Luna) to $0.0170 (Claude Opus 5.5) for this prompt. In llmwise you don't pay by the token: a reply like these counts as one message on Pro, whichever model answers.
Claude, GPT, Gemini, DeepSeek, Grok, Kimi, and GLM, in one chat.
See what a message costs before you send it. Free is 5 messages to try; sign in with an email link, no password or card.