Tested prompt · Math
Compound interest over three years: every AI model's reply, tested
We sent this everyday math 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
All 16 models passed this math prompt's check (final answer). The cheapest reply that passed was GPT-6 Luna's, at $0.000080; the fastest, GLM 5.3's in 0.6 s. The dearest reply, Gemini 3.1 Pro's, cost 124 times as much ($0.0099).
The prompt, as sent, and its check
Checked by final answer, the same way for every model.
Compound interest over three years (everyday)
You put $2,000 in a savings account that pays 5% interest a year, compounded once a year. How much interest have you earned after 3 years, to the cent? Show your working briefly, then end with a line that says "Final answer: " followed by the answer alone.
The final answer must be 315.25.
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 | Passed: Final answer 315.25: right. | $0.0092 | 3.6 s | 76 tokens |
| Claude Opus 5.5Anthropic | Passed: Final answer 315.25: right. | $0.0043 | 3.7 s | 83 tokens |
| Claude Sonnet 5.5Anthropic | Passed: Final answer 315.25: right. | $0.0021 | 1.3 s | 106 tokens |
| Claude Sonnet 5Anthropic | Passed: Final answer 315.25: right. | $0.0021 | 3.7 s | 61 tokens |
| Claude Haiku 4.5Anthropic | Passed: Final answer 315.25: right. | $0.0013 | 3.5 s | 173 tokens |
| GPT-6 AstraOpenAI | Passed: Final answer 315.25: right. | $0.0072 | 2.7 s | 64 tokens |
| GPT-6 SolOpenAI | Passed: Final answer 315.25: right. | $0.0014 | 1.4 s | 62 tokens |
| GPT-6 LunaOpenAI | Passed: Final answer 315.25: right. | $0.000080 | 2.0 s | 38 tokens |
| Gemini 3.1 Pro (preview)Google | Passed: Final answer 315.25: right. | $0.0099 | 6.2 s | 232 tokens |
| Gemini 3.8 FlashGoogle | Passed: Final answer 315.25: right. | $0.00088 | 2.1 s | 148 tokens |
| DeepSeek V4.1 FlashDeepSeek | Passed: Final answer 315.25: right. | $0.00021 | 1.5 s | 104 tokens |
| DeepSeek V4 ProDeepSeek | Passed: Final answer 315.25: right. | $0.00035 | 1.5 s | 64 tokens |
| Grok 4.7xAI | Passed: Final answer 315.25: right. | $0.0031 | 5.5 s | 91 tokens |
| Kimi K3Moonshot | Passed: Final answer 315.25: right. | $0.0044 | 5.9 s | 64 tokens |
| GLM 5.3Z.ai | Passed: Final answer 315.25: right. | $0.00055 | 0.6 s | 56 tokens |
| GLM 5.3 FlashZ.ai | Passed: Final answer 315.25: right. | $0.00016 | 4.9 s | 94 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
Every reply passed: here they are from the cheapest up.
GPT-6 Luna
Passed: Final answer 315.25: right.
Interest earned = $2,000 × (1.05)³ − $2,000 = $315.25 Final answer: $315.25
402 tokens in, 79 out (41 of them reasoning) · 2.0 s · $0.0001 · 1 message on Pro · answered by openai/gpt-6-luna via OpenAI ·
GLM 5.3 Flash
Passed: Final answer 315.25: right.
**Working:** - Formula: A = P(1 + r)ⁿ = 2000 × (1.05)³ - (1.05)³ = 1.157625 - A = 2000 × 1.157625 = $2,315.25 - Interest earned = 2,315.25 − 2,000 = $315.25 Final answer: $315.25
417 tokens in, 165 out (71 of them reasoning) · 4.9 s · $0.0002 · 1 message on Pro · answered by z-ai/glm-5.3-flash via Wafer ·
DeepSeek V4.1 Flash
Passed: Final answer 315.25: right.
**Working:** - Year 1: $2,000 × 1.05 = $2,100.00 - Year 2: $2,100.00 × 1.05 = $2,205.00 - Year 3: $2,205.00 × 1.05 = $2,315.25 Interest earned = $2,315.25 − $2,000.00 = **$315.25** Final answer: $315.25
440 tokens in, 186 out (82 of them reasoning) · 1.5 s · $0.0002 · 1 message on Pro · answered by deepseek/deepseek-v4.1-flash via CoreWeave ·
DeepSeek V4 Pro
Passed: Final answer 315.25: right.
Amount after 3 years = $2,000 × (1.05)^3 = $2,000 × 1.157625 = $2,315.25 Interest earned = $2,315.25 − $2,000 = $315.25 Final answer: $315.25
413 tokens in, 148 out (84 of them reasoning) · 1.5 s · $0.0004 · 1 message on Pro · answered by deepseek/deepseek-v4-pro-0813 via Ionstream ·
GLM 5.3
Passed: Final answer 315.25: right.
A = 2000 × 1.05³ = 2000 × 1.157625 = 2315.25 Interest = 2315.25 − 2000 = 315.25 Final answer: $315.25
416 tokens in, 57 out (1 of them reasoning) · 0.6 s · $0.0005 · 1 message on Pro · answered by z-ai/glm-5.3 via Sail Research ·
Gemini 3.8 Flash
Passed: Final answer 315.25: right.
To find the total amount $A$ after 3 years: $A = P(1 + r)^t$ $A = 2000 \times (1 + 0.05)^3$ $A = 2000 \times (1.05)^3$ $A = 2000 \times 1.157625 = 2315.25$ To find the interest earned: $\text{Interest} = A - P = 2315.25 - 2000 = 315.25$ Final answer: $315.25429 tokens in, 148 out · 2.1 s · $0.0009 · 1 message on Pro · answered by google/gemini-3.8-flash via Google ·
Claude Haiku 4.5
Passed: Final answer 315.25: right.
I'll calculate the compound interest for you. **Formula:** A = P(1 + r)^n Where: - P = Principal = $2,000 - r = Annual interest rate = 0.05 - n = Number of years = 3 **Calculation:** - Year 1: $2,000 × 1.05 = $2,100.00 - Year 2: $2,100 × 1.05 = $2,205.00 - Year 3: $2,205 × 1.05 = $2,315.25 **Interest earned:** $2,315.25 - $2,000.00 = $315.25 Final answer: $315.25
430 tokens in, 173 out · 3.5 s · $0.0013 · 1 message on Pro · answered by anthropic/claude-haiku-4.5 via Amazon Bedrock ·
GPT-6 Sol
Passed: Final answer 315.25: right.
After 3 years, the balance is \(2000(1.05)^3=\$2,315.25\). Subtracting the original deposit gives \(2315.25-2000=\$315.25\) in interest. Final answer: $315.25
402 tokens in, 62 out · 1.4 s · $0.0014 · 1 message on Pro · answered by openai/gpt-6-sol via OpenAI ·
Claude Sonnet 5
Passed: Final answer 315.25: right.
2000 × 1.05³ = 2000 × 1.157625 = 2315.25 Interest = 2315.25 − 2000 = 315.25 Final answer: $315.25
539 tokens in, 102 out (41 of them reasoning) · 3.7 s · $0.0021 · 1 message on Pro · answered by anthropic/claude-sonnet-5 via Claude Platform on AWS ·
Claude Sonnet 5.5
Passed: Final answer 315.25: right.
Compound interest: A = P(1 + r)^t - A = 2000 × (1.05)^3 - 1.05^3 = 1.157625 - A = 2000 × 1.157625 = 2,315.25 - Interest = 2,315.25 − 2,000 = 315.25 Final answer: $315.25
543 tokens in, 106 out · 1.3 s · $0.0021 · 1 message on Pro · answered by anthropic/claude-sonnet-5.5 via Anthropic ·
Grok 4.7
Passed: Final answer 315.25: right.
Principal \(P = 2000\), rate \(r = 0.05\), time \(t = 3\). \[ A = 2000 \times (1.05)^3 = 2000 \times 1.157625 = 2315.25 \] Interest earned \(= 2315.25 - 2000 = 315.25\). Final answer: $315.25
1,636 tokens in, 460 out (369 of them reasoning) · 5.5 s · $0.0031 · 1 message on Pro · answered by x-ai/grok-4.7 via xAI ·
Claude Opus 5.5
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 ·
Kimi K3
Passed: Final answer 315.25: right.
Amount after 3 years: \(2000 \times 1.05^3 = 2315.25\) Interest earned: \(2315.25 - 2000 = 315.25\) Final answer: $315.25
491 tokens in, 171 out (107 of them reasoning) · 5.9 s · $0.0044 · 1 message on Pro · answered by moonshotai/kimi-k3 via Fireworks ·
GPT-6 Astra
Passed: Final answer 315.25: right.
After 3 years, the balance is: \[ 2000(1.05)^3 = \$2,315.25 \] Interest earned: \[ \$2,315.25 - \$2,000 = \$315.25 \] Final answer: $315.25
402 tokens in, 64 out · 2.7 s · $0.0072 · 1 message on Pro · answered by openai/gpt-6-astra via OpenAI ·
Claude Fable 5.1
Passed: Final answer 315.25: right.
Balance after 3 years: 2000 × 1.05³ = 2000 × 1.157625 = $2,315.25 Interest earned: 2,315.25 − 2,000 = $315.25 Final answer: $315.25
541 tokens in, 76 out · 3.6 s · $0.0092 · 1 message on Pro · answered by anthropic/claude-fable-5.1 via Anthropic ·
Gemini 3.1 Pro
Passed: Final answer 315.25: right.
To find the interest earned, we first calculate the total amount in the account after 3 years using the compound interest formula: A = P(1 + r)^t. * **Principal (P):** $2,000 * **Rate (r):** 5% or 0.05 * **Time (t):** 3 years Year 1: $2,000 \times 1.05 = $2,100.00 Year 2: $2,100 \times 1.05 = $2,205.00 Year 3: $2,205 \times 1.05 = $2,315.25 Total amount after 3 years = $2,315.25 Total interest earned = Total amount - Principal Total interest = $2,315.25 - $2,000.00 = $315.25 Final answer: $315.25
429 tokens in, 754 out (522 of them reasoning) · 6.2 s · $0.0099 · 1 message on Pro · answered by google/gemini-3.1-pro-preview via Google ·
More math prompts
The other math prompts, each with every model's reply, and the results across all five.
Questions
Which AI does best on “Compound interest over three years”?
All 16 models passed this math prompt's check (final answer). The cheapest reply that passed was GPT-6 Luna's, at $0.000080; the fastest, GLM 5.3's in 0.6 s. The dearest reply, Gemini 3.1 Pro's, cost 124 times as much ($0.0099).
What does a reply to “Compound interest over three years” cost?
Through the models' APIs, what OpenRouter charged us ran from $0.000080 (GPT-6 Luna) to $0.0099 (Gemini 3.1 Pro) 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.
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