Claude Opus 5.5 · Math
Claude Opus 5.5 for math: our test runs
Claude Opus 5.5 ran our 5 math prompts in llmwise, through the same pipeline your messages take. Here's every reply as it came, whether it passed, what it cost and what it counts as on Pro, next to the other models.
Based on 5 of our test runs on , through OpenRouter with the app's own prompt and settings. Updated .
Short answer
In our test runs on September 27, 2026, Claude Opus 5.5 passed 5 of 5 of our math prompts (both hard ones): tied 1st of 20 models. Each reply counted as 1 message on Pro, where it has 62 a month, and cost $0.0060 to run on average.
Prompt by prompt
Each of the 5 math prompts, and how Claude Opus 5.5's reply did.
| Prompt | Result | Cost | Time |
|---|---|---|---|
| A discount, then sales taxEveryday | Passed: Final answer 66: right. | $0.0037 | 2.7 s |
| Pens at 3 for $4Everyday | Passed: Final answer 3 packs of 3 plus 1 single pen, costing 13.50: right. | $0.0084 | 5.3 s |
| Compound interest over three yearsEveryday | Passed: Final answer 315.25: right. | $0.0043 | 3.7 s |
| Four-digit numbers whose digits sum to 9Hard | Passed: Final answer 165: right. | $0.0077 | 4.7 s |
| The highest of three dice is a 5Hard | Passed: Final answer 61/216: right. | $0.0057 | 3.9 s |
Every math reply from Claude Opus 5.5
A discount, then sales tax
An everyday prompt: “A discount, then sales tax”, in full.
Passed: Final answer 66: right.
Discount: 25% of $80 = $20, so the discounted price is $80 − $20 = $60. Tax: 10% of $60 = $6, so the total is $60 + $6 = $66. Final answer: $66
543 tokens in, 74 out · 2.7 s · $0.0037 · 1 message on Pro · answered by anthropic/claude-opus-5.5 via Claude Platform on AWS ·
Pens at 3 for $4
An everyday prompt: “Pens at 3 for $4”, in full.
Passed: Final answer 3 packs of 3 plus 1 single pen, costing 13.50: right.
Each pen costs about $1.33 in a pack of 3 ($4 ÷ 3) and $1.50 on its own. So use as many packs as possible. For exactly 10 pens: - 3 packs + 1 single = $12 + $1.50 = **$13.50** - 2 packs + 4 singles = $8 + $6 = $14.00 - 1 pack + 7 singles = $4 + $10.50 = $14.50 - 10 singles = $15.00 Final answer: 3 packs of 3 plus 1 single pen, costing $13.50
547 tokens in, 311 out (122 of them reasoning) · 5.3 s · $0.0084 · 1 message on Pro · answered by anthropic/claude-opus-5.5 via Claude Platform on AWS ·
Compound interest over three years
An everyday prompt: “Compound interest over three years”, in full.
Passed: Final answer 315.25: right.
**Working:** Amount after 3 years = 2000 × (1.05)³ = 2000 × 1.157625 = $2,315.25 Interest earned = 2,315.25 − 2,000 = $315.25 Final answer: $315.25
541 tokens in, 108 out (25 of them reasoning) · 3.7 s · $0.0043 · 1 message on Pro · answered by anthropic/claude-opus-5.5 via Claude Platform on AWS ·
Four-digit numbers whose digits sum to 9
A hard prompt: “Four-digit numbers whose digits sum to 9”, in full.
Passed: Final answer 165: right.
Let the number have digits $a, b, c, d$ with $a \ge 1$ and $a + b + c + d = 9$. Substitute $a' = a - 1 \ge 0$. Then $a' + b + c + d = 8$, where all variables are non-negative. By stars and bars, the number of solutions is $\binom{8+3}{3} = \binom{11}{3} = 165$. No digit can exceed 9, because the largest possible value is $a = 9$ (when $a' = 8$). So every solution gives a valid four-digit number. Final answer: 165512 tokens in, 282 out (91 of them reasoning) · 4.7 s · $0.0077 · 1 message on Pro · answered by anthropic/claude-opus-5.5 via Claude Platform on AWS ·
The highest of three dice is a 5
A hard prompt: “The highest of three dice is a 5”, in full.
Passed: Final answer 61/216: right.
P(max = 5) = P(all ≤ 5) − P(all ≤ 4) - P(all ≤ 5) = (5/6)³ = 125/216 - P(all ≤ 4) = (4/6)³ = 64/216 So P(max = 5) = (125 − 64)/216 = 61/216. 61 is prime and doesn't divide 216, so this is already in lowest terms. Final answer: 61/216
539 tokens in, 178 out (34 of them reasoning) · 3.9 s · $0.0057 · 1 message on Pro · answered by anthropic/claude-opus-5.5 via Claude Platform on AWS ·
How it compares on math
Claude Opus 5.5 beside the job's picks among every model. 19 models share the hard-problems pick, Claude Opus 5.5 among them.
| Model | Passed | On Pro | Cost per reply |
|---|---|---|---|
| GLM 5.3Our pick: hard problems (shared), best value | 5 of 5 | 250 a month on Pro | $0.0004 |
| Claude Haiku 5.5Our pick: hard problems (shared), everyday | 5 of 5 | 60 a day on Pro | $0.0001 |
| Claude Opus 5.5Our pick: hard problems (shared) | 5 of 5 | 62 a month on Pro | $0.0060 |
Every limit is published. Paid plans also have a monthly fair-use limit on AI cost: Plus $3.75, 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 Opus 5.5 next to each model on math
Claude Opus 5.5 against each model on the same 5 math prompts. One run each, through OpenRouter: a wait depends on the provider and the load that day, so a lead under 10% counts as close.
Against Claude Fable 5.1: Claude Opus 5.5 answered 1.2× sooner (3.9 s to 4.6 s), cost 2.0× less, and passed 5 of 5 to its 5.
Against Claude Sonnet 5.5: Claude Opus 5.5 answered 2.4× later (3.9 s to 1.7 s), cost 2.4× more, and passed 5 of 5 to its 5.
Against Claude Sonnet 5: Claude Opus 5.5 answered within 10% of its time (3.9 s to 3.9 s), cost 1.8× more, and passed 5 of 5 to its 5.
Against Claude Haiku 5.5: Claude Opus 5.5 answered 2.2× later (3.9 s to 1.7 s), cost 40.5× more, and passed 5 of 5 to its 5.
Against Claude Haiku 4.5: Claude Opus 5.5 answered 1.7× later (3.9 s to 2.2 s), cost 3.9× more, and passed 5 of 5 to its 5.
Against GPT-6 Astra: Claude Opus 5.5 answered 1.5× later (3.9 s to 2.6 s), cost 1.4× less, and passed 5 of 5 to its 5.
Against GPT-6.1 Sol: Claude Opus 5.5 answered 2.2× later (3.9 s to 1.8 s), cost 6.9× more, and passed 5 of 5 to its 5.
Against GPT-6 Sol: Claude Opus 5.5 answered 1.8× later (3.9 s to 2.2 s), cost 3.3× more, and passed 5 of 5 to its 5.
Against GPT-6 Luna: Claude Opus 5.5 answered 1.8× later (3.9 s to 2.2 s), cost 60.5× more, and passed 5 of 5 to its 4. Only Claude Opus 5.5 passed Pens at 3 for $4.
Against Gemini 4 Argon: Claude Opus 5.5 answered 1.1× sooner (3.9 s to 4.4 s), cost 3.8× more, and passed 5 of 5 to its 5.
Against Gemini 3.1 Pro (preview): Claude Opus 5.5 answered 2.1× sooner (3.9 s to 8.3 s), cost 1.7× less, and passed 5 of 5 to its 5.
Against Gemini 3.8 Flash: Claude Opus 5.5 answered 1.2× sooner (3.9 s to 4.7 s), cost 4.2× more, and passed 5 of 5 to its 5.
Against DeepSeek V4.1 Flash: Claude Opus 5.5 answered 4.2× later (3.9 s to 0.9 s), cost 23.8× more, and passed 5 of 5 to its 5.
Against DeepSeek V4 Pro: Claude Opus 5.5 answered 1.4× later (3.9 s to 2.7 s), cost 6.8× more, and passed 5 of 5 to its 5.
Against Grok 4.7: Claude Opus 5.5 answered 3.0× sooner (3.9 s to 11.7 s), cost 1.2× less, and passed 5 of 5 to its 5.
Against Kimi K3: Claude Opus 5.5 answered 1.4× sooner (3.9 s to 5.4 s), cost 1.6× more, and passed 5 of 5 to its 5.
Against GLM 5.3: Claude Opus 5.5 answered 4.1× later (3.9 s to 0.9 s), cost 16.9× more, and passed 5 of 5 to its 5.
Against GLM 5.3 Flash: Claude Opus 5.5 answered 1.4× later (3.9 s to 2.7 s), cost 39.7× more, and passed 5 of 5 to its 5.
Against Mistral Large 4: Claude Opus 5.5 answered 1.3× sooner (3.9 s to 5.1 s), cost 3.3× more, and passed 5 of 5 to its 5.
How these runs were done
Final answer. Automatic. The reply's last “Final answer:” line must hold the right value.
Claude Opus 5.5, and math, elsewhere
- Claude Opus 5.5: price, limits and messages on every plan
- The best AI for math: our picks among every model
- Claude Opus 5.5 for coding: our test runs
- Claude Opus 5.5 for writing: our test runs
- Claude Opus 5.5 for data analysis: our test runs
- Claude Fable 5.1 vs Claude Opus 5.5
- Claude Opus 5.5 vs Claude Sonnet 5
- Claude Opus 5.5 vs Claude Sonnet 5.5
- Gemini 4 Argon vs Claude Opus 5.5
- Claude Opus 5.5 vs GPT-6 Astra
- Claude Opus 5.5 vs GPT-6 Sol
- Claude Opus 5.5 vs DeepSeek V4 Pro
- Claude Opus 5.5 vs Claude Haiku 4.5
- Claude Opus 5.5 vs Gemini 3.1 Pro (preview)
- Claude Opus 5.5 vs Kimi K3
- Analyze a CSV with code: the prompt, and its price
- AI prompts for students, tested on four models
- AI prompts for teachers, tested with every reply
- Our test runs: 50 prompts on every model
Questions
Is Claude Opus 5.5 good for math?
In our test runs it passed 5 of 5 math prompts, tied 1st of the 20 models in llmwise. Every reply is on this page, so you can judge them yourself.
How many of my messages does a math reply from Claude Opus 5.5 use?
1 message each on Pro, where it has 62 a month on Pro. The price of a message is fixed and shown before you send it, however long the reply.
How were these runs done?
The same way for every model: each prompt sent through llmwise's own pipeline, each reply checked the same way. The methods page has every prompt and how each is scored.
Claude, GPT, Gemini, DeepSeek, Grok, Kimi, GLM, and Mistral, in one chat.
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