AI chat · Claude
Chat with Claude online
4 Claude models in llmwise, 2 of them in the 5 free messages you get on sign-up. Claude Opus 5.5 passed 49 of 50 of our test prompts, the most of any Claude model.
A real answer from our test runs
Claude Sonnet 5A shop sells pens at 3 for $4, or $1.50 for a single pen. What's the cheapest way to pay for exactly 10 pens, and what does it cost? Show your working briefly, then end with a line that says "Final answer: " followed by the answer alone.
Claude Sonnet 5 · passed our check · September 27, 2026
Compare unit costs: 3-for-$4 = $1.33/pen, cheaper than the $1.50 single price. So maximize the number of 3-packs. 10 pens = 3 packs of 3 (9 pens) + 1 single pen Cost = 3×$4 + 1×$1.50 = $12 + $1.50 = $13.50 Check alternative (2 packs + 4 singles): 2×$4 + 4×$1.50 = $8 + $6 = $14 (worse) Check buying an extra pack for surplus: 4 packs = $16 for 12 pens (worse, and you don't need 12) Final answer: Buy 3 packs of 3 pens ($4 each) plus 1 single pen ($1.50), total $13.50.
Ask Claude Sonnet 5 your own question: it's in the 5 free messages you get on sign-up, no card.
Start freeFacts about other apps checked against Claude pricing. Updated .
Short answer
Claude Opus 5.5 passed the most of our test prompts, 49 of 50; Claude Sonnet 5 46 of 50, Claude Fable 5.1 45 of 50, and Claude Haiku 4.5 43 of 50. Claude Sonnet 5 and Claude Haiku 4.5 are in the 5 free messages you get on sign-up.
The Claude models in llmwise
Every Claude model in llmwise: the free trial, Pro's count, a typical message at its API price, and our test results.
| Model | Free trial | On Pro | Typical message, API price | Our test prompts passed |
|---|---|---|---|---|
| Claude Fable 5.1Anthropic | No | 31 a month | $0.0750 | 45 of 50 (17 of 20 hard) |
| Claude Opus 5.5Anthropic | No | 62 a month | $0.0300 | 49 of 50 (19 of 20 hard) |
| Claude Sonnet 5Anthropic | Yes | 125 a month | $0.0150 | 46 of 50 (19 of 20 hard) |
| Claude Haiku 4.5Anthropic | Yes | 250 a month | $0.0075 | 43 of 50 (15 of 20 hard) |
On Pro: the most messages a month on the model if the month goes to it alone, or a day's on an everyday model. The API price is a 4,000-token question with a 700-token answer at the model's list price as of September 2026; in llmwise you pay per message. Our tests: the 50 prompts of our test runs on September 27, 2026.
Every limit is published. Paid plans also have a monthly fair-use limit on AI cost: Pro $7.50, Max $20, Ultra $42, Studio $85. Using every message on your plan at typical sizes stays under it; very large messages and heavy research use it faster. Every limit, explained.
Claude, job by job
Prompts passed on each of our 10 jobs, 5 prompts a job.
| Job | Claude Fable 5.1 | Claude Opus 5.5 | Claude Sonnet 5 | Claude Haiku 4.5 |
|---|---|---|---|---|
| Coding | 5 of 5 | 5 of 5 | 5 of 5 | 3 of 5 |
| Writing | 3 of 5 | 4 of 5 | 4 of 5 | 4 of 5 |
| Math | 5 of 5 | 5 of 5 | 5 of 5 | 5 of 5 |
| Summarization | 3 of 5 | 5 of 5 | 3 of 5 | 5 of 5 |
| Data analysis | 5 of 5 | 5 of 5 | 4 of 5 | 3 of 5 |
| Customer support | 4 of 5 | 5 of 5 | 5 of 5 | 3 of 5 |
| Translation | 5 of 5 | 5 of 5 | 5 of 5 | 5 of 5 |
| SQL | 5 of 5 | 5 of 5 | 5 of 5 | 5 of 5 |
| RAG and answering from documents | 5 of 5 | 5 of 5 | 5 of 5 | 5 of 5 |
| Agents and tool use | 5 of 5 | 5 of 5 | 5 of 5 | 5 of 5 |
When to pick which Claude model
Among the Claude models only: the one that passed the most of each job, and when others tie, the one that costs less.
Coding
Claude Sonnet 5, 5 of 5 passed (2 of 2 hard). Claude Opus 5.5 and Claude Fable 5.1 passed as many; Claude Sonnet 5 costs less.
Writing
Claude Sonnet 5, 4 of 5 passed (2 of 2 hard).
Math
Claude Haiku 4.5, 5 of 5 passed (2 of 2 hard). Claude Sonnet 5, Claude Opus 5.5, and Claude Fable 5.1 passed as many; Claude Haiku 4.5 costs less.
Summarization
Claude Haiku 4.5, 5 of 5 passed (2 of 2 hard). Claude Opus 5.5 passed as many; Claude Haiku 4.5 costs less.
Data analysis
Claude Opus 5.5, 5 of 5 passed (2 of 2 hard). Claude Fable 5.1 passed as many; Claude Opus 5.5 costs less.
Customer support
Claude Sonnet 5, 5 of 5 passed (2 of 2 hard). Claude Opus 5.5 passed as many; Claude Sonnet 5 costs less.
Translation
Claude Haiku 4.5, 5 of 5 passed (2 of 2 hard). Claude Sonnet 5, Claude Opus 5.5, and Claude Fable 5.1 passed as many; Claude Haiku 4.5 costs less.
SQL
Claude Haiku 4.5, 5 of 5 passed (2 of 2 hard). Claude Sonnet 5, Claude Opus 5.5, and Claude Fable 5.1 passed as many; Claude Haiku 4.5 costs less.
RAG and answering from documents
Claude Haiku 4.5, 5 of 5 passed (2 of 2 hard). Claude Sonnet 5, Claude Opus 5.5, and Claude Fable 5.1 passed as many; Claude Haiku 4.5 costs less.
Agents and tool use
Claude Haiku 4.5, 5 of 5 passed (2 of 2 hard). Claude Sonnet 5, Claude Opus 5.5, and Claude Fable 5.1 passed as many; Claude Haiku 4.5 costs less.
Claude on one prompt, side by side
The same hard writing prompt, “A product announcement with five rules”, sent to Claude Fable 5.1, Claude Opus 5.5, and Claude Sonnet 5: Claude Fable 5.1 failed, Claude Opus 5.5 passed, and Claude Sonnet 5 passed.
The prompt: 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.
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 ·
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 ·
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 ·
Anthropic's own app
llmwise isn't Anthropic's app. Claude, Anthropic's own, has a free tier too; in its words: “Free for everyone” (Claude pricing, checked ).
Where your messages go
In llmwise, a message to Claude goes to its maker, Anthropic, or through OpenRouter when llmwise can't reach the maker directly. The Privacy Policy has the details.
More ways to chat
The other chat pages, each with its own models and test results.
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Questions
Can I chat with Claude for free?
Yes, to try: Claude Sonnet 5 and Claude Haiku 4.5 are in the 5 free messages you get when you sign up, once and with no card. Claude Fable 5.1 and Claude Opus 5.5 need a paid plan, from $20 a month. The free-message box on this page, when it shows, is answered by GPT-6 Luna, not by Claude.
Is this the official Claude app?
No. llmwise isn't made by Anthropic and isn't affiliated with it: it offers Anthropic's Claude models next to 6 other AI families, in one chat. Anthropic's own app has a free tier too; in its words: “Free for everyone” (Claude pricing, checked September 28, 2026).
Which Claude model should I use?
In our test runs on September 27, 2026, Claude Opus 5.5 passed the most: 49 of 50 prompts. The cheapest per message, Claude Haiku 4.5, passed 43 of 50. Start on the cheaper one and switch when an answer isn't good enough: the next model sees the whole chat.
Where do my Claude messages go?
In llmwise, a message to Claude goes to its maker, Anthropic, or through OpenRouter when llmwise can't reach the maker directly.
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.