| # Transcript — 2026-08-16 |
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| Models: claude-opus-5, claude-sonnet-5, claude-haiku-4-5, claude-fable-5. Seed 20260812. Tools and MCP disabled. |
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| Command (prompt over stdin): |
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| ``` |
| claude -p --output-format json --model <model> --tools "" --strict-mcp-config --mcp-config no-mcp.json |
| ``` |
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| Expected values are computed in `run.ts`, never by a model. |
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| ## mrr-0 |
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| **Question** |
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| ``` |
| A SaaS starts at $8,000 MRR. Each month, in this exact order: MRR first grows by 7.0%, then 2.4% of the resulting MRR churns away. What is MRR after 36 months? |
| ``` |
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| **Expected** (computed in code): 38115.30678167854 |
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| ### claude-opus-5 |
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| ``` |
| ANSWER: 38115.31 |
| ``` |
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| Parsed: 38115.31 · error: 0.0000% · reasoning tokens: 936 |
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| ### claude-sonnet-5 |
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| ``` |
| ANSWER: 38115.31 |
| ``` |
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| Parsed: 38115.31 · error: 0.0000% · reasoning tokens: 5896 |
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| ### claude-haiku-4-5 (answered by claude-haiku-4-5-20251001) |
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| ``` |
| ANSWER: $38,115 |
| ``` |
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| Parsed: 38115 · error: 0.0008% · reasoning tokens: 7710 |
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| ### claude-fable-5 |
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| ``` |
| ANSWER: 38115.34 |
| ``` |
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| Parsed: 38115.34 · error: 0.0001% · reasoning tokens: 1430 |
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| ## cash-1 |
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| **Question** |
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| ``` |
| A company starts with $900,000 in cash. It spends a fixed $40,000 every month. Revenue is $18,000 in month 1 and grows 5.0% every month after that (month 2 revenue = month 1 revenue x 1.05, and so on). Cash after 60 months = starting cash + all revenue collected - all spend. What is it? |
| ``` |
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| **Expected** (computed in code): 4864506.921884278 |
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| ### claude-opus-5 |
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| ``` |
| ANSWER: 4864506.92 |
| ``` |
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| Parsed: 4864506.92 · error: 0.0000% · reasoning tokens: 1018 |
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| ### claude-sonnet-5 |
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| ``` |
| ANSWER: 4864506.96 |
| ``` |
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| Parsed: 4864506.96 · error: 0.0000% · reasoning tokens: 3281 |
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| ### claude-haiku-4-5 (answered by claude-haiku-4-5-20251001) |
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| ``` |
| ANSWER: 4864544.82 |
| ``` |
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| Parsed: 4864544.82 · error: 0.0008% · reasoning tokens: 3873 |
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| ### claude-fable-5 |
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| ``` |
| ANSWER: 4864506.92 |
| ``` |
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| Parsed: 4864506.92 · error: 0.0000% · reasoning tokens: 1182 |
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| ## ltv-2 |
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| **Question** |
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| ``` |
| ARPU is $240/month, gross margin is 78%, monthly customer churn is 2.4%. Using LTV = ARPU x gross margin / monthly churn, what is LTV? |
| ``` |
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| **Expected** (computed in code): 7800.000000000001 |
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| ### claude-opus-5 |
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| ``` |
| ANSWER: 7800 |
| ``` |
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| Parsed: 7800 · error: 0.0000% · reasoning tokens: 27 |
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| ### claude-sonnet-5 |
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| ``` |
| ANSWER: 7800 |
| ``` |
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| Parsed: 7800 · error: 0.0000% · reasoning tokens: 0 |
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| ### claude-haiku-4-5 (answered by claude-haiku-4-5-20251001) |
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| ``` |
| ANSWER: 7800 |
| ``` |
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| Parsed: 7800 · error: 0.0000% · reasoning tokens: 161 |
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| ### claude-fable-5 |
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| ``` |
| ANSWER: 7800 |
| ``` |
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| Parsed: 7800 · error: 0.0000% · reasoning tokens: 33 |
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| ## two-phase-3 |
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| **Question** |
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| ``` |
| A SaaS starts at $26,000 MRR. Each month, in this exact order: MRR grows, then churn is applied to the grown figure. Growth is 9.0% for months 1 through 6, and 3.0% from month 7 onwards. Churn is 4.0% every month. What is MRR after 60 months? |
| ``` |
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| **Expected** (computed in code): 18578.74834305274 |
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| ### claude-opus-5 |
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| ``` |
| ANSWER: 18578.75 |
| ``` |
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| Parsed: 18578.75 · error: 0.0000% · reasoning tokens: 1665 |
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| ### claude-sonnet-5 |
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| ``` |
| ANSWER: 18578.73 |
| ``` |
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| Parsed: 18578.73 · error: 0.0001% · reasoning tokens: 10793 |
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| ### claude-haiku-4-5 (answered by claude-haiku-4-5-20251001) |
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| ``` |
| ANSWER: 18553 |
| ``` |
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| Parsed: 18553 · error: 0.1386% · reasoning tokens: 13085 |
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| ### claude-fable-5 |
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| ``` |
| ANSWER: 18578.75 |
| ``` |
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| Parsed: 18578.75 · error: 0.0000% · reasoning tokens: 1148 |
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| ## runway-4 |
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| **Question** |
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| ``` |
| A company has $300,000 in cash and no revenue. Monthly burn is $60,000 in months 1, 2 and 3, then increases by $10,000 every 3 months (so it steps up in month 4, again in month 7, and so on). In which month number does the cash balance first go below zero? |
| ``` |
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| **Expected** (computed in code): 5 |
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| ### claude-opus-5 |
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| ``` |
| ANSWER: 5 |
| ``` |
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| Parsed: 5 · error: 0.0000% · reasoning tokens: 90 |
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| ### claude-sonnet-5 |
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| ``` |
| ANSWER: 5 |
| ``` |
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| Parsed: 5 · error: 0.0000% · reasoning tokens: 133 |
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| ### claude-haiku-4-5 (answered by claude-haiku-4-5-20251001) |
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| ``` |
| ANSWER: 5 |
| ``` |
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| Parsed: 5 · error: 0.0000% · reasoning tokens: 355 |
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| ### claude-fable-5 |
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| ``` |
| ANSWER: 5 |
| ``` |
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| Parsed: 5 · error: 0.0000% · reasoning tokens: 104 |
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| ## mrr-5 |
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| **Question** |
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| ``` |
| A SaaS starts at $12,000 MRR. Each month, in this exact order: MRR first grows by 4.0%, then 3.5% of the resulting MRR churns away. What is MRR after 60 months? |
| ``` |
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| **Expected** (computed in code): 14887.453040647115 |
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| ### claude-opus-5 |
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| ``` |
| ANSWER: 14887.45 |
| ``` |
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| Parsed: 14887.45 · error: 0.0000% · reasoning tokens: 338 |
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| ### claude-sonnet-5 |
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| ``` |
| ANSWER: 14887.45 |
| ``` |
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| Parsed: 14887.45 · error: 0.0000% · reasoning tokens: 1403 |
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| ### claude-haiku-4-5 (answered by claude-haiku-4-5-20251001) |
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| ``` |
| ANSWER: 14887.54 |
| ``` |
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| Parsed: 14887.54 · error: 0.0006% · reasoning tokens: 10160 |
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| ### claude-fable-5 |
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| ``` |
| ANSWER: 14887.46 |
| ``` |
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| Parsed: 14887.46 · error: 0.0000% · reasoning tokens: 488 |
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| ## cash-6 |
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| **Question** |
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| ``` |
| A company starts with $420,000 in cash. It spends a fixed $40,000 every month. Revenue is $18,000 in month 1 and grows 11.0% every month after that (month 2 revenue = month 1 revenue x 1.11, and so on). Cash after 36 months = starting cash + all revenue collected - all spend. What is it? |
| ``` |
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| **Expected** (computed in code): 5822959.304807226 |
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| ### claude-opus-5 |
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| ``` |
| ANSWER: 5822959 |
| ``` |
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| Parsed: 5822959 · error: 0.0000% · reasoning tokens: 1440 |
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| ### claude-sonnet-5 |
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| ``` |
| ANSWER: 5822959.31 |
| ``` |
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| Parsed: 5822959.31 · error: 0.0000% · reasoning tokens: 5427 |
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| ### claude-haiku-4-5 (answered by claude-haiku-4-5-20251001) |
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| ``` |
| ANSWER: 5831410 |
| ``` |
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| Parsed: 5831410 · error: 0.1451% · reasoning tokens: 7051 |
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| ### claude-fable-5 |
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| ``` |
| ANSWER: 5822959 |
| ``` |
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| Parsed: 5822959 · error: 0.0000% · reasoning tokens: 1585 |
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| ## ltv-7 |
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| **Question** |
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| ``` |
| ARPU is $49/month, gross margin is 91%, monthly customer churn is 1.9%. Using LTV = ARPU x gross margin / monthly churn, what is LTV? |
| ``` |
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| **Expected** (computed in code): 2346.842105263158 |
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| ### claude-opus-5 |
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| ``` |
| ANSWER: 2346.84 |
| ``` |
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| Parsed: 2346.84 · error: 0.0001% · reasoning tokens: 45 |
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| ### claude-sonnet-5 |
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| ``` |
| ANSWER: 2347.37 |
| ``` |
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| Parsed: 2347.37 · error: 0.0225% · reasoning tokens: 33 |
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| ### claude-haiku-4-5 (answered by claude-haiku-4-5-20251001) |
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| ``` |
| ANSWER: 2346.32 |
| ``` |
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| Parsed: 2346.32 · error: 0.0222% · reasoning tokens: 421 |
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| ### claude-fable-5 |
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| ``` |
| ANSWER: 2346.84 |
| ``` |
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| Parsed: 2346.84 · error: 0.0001% · reasoning tokens: 42 |
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| ## two-phase-8 |
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| **Question** |
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| ``` |
| A SaaS starts at $9,000 MRR. Each month, in this exact order: MRR grows, then churn is applied to the grown figure. Growth is 9.0% for months 1 through 6, and 3.0% from month 7 onwards. Churn is 1.5% every month. What is MRR after 36 months? |
| ``` |
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| **Expected** (computed in code): 21262.901931922686 |
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| ### claude-opus-5 |
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| ``` |
| ANSWER: 21262.9 |
| ``` |
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| Parsed: 21262.9 · error: 0.0000% · reasoning tokens: 2055 |
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| ### claude-sonnet-5 |
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| ``` |
| ANSWER: 21262.91 |
| ``` |
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| Parsed: 21262.91 · error: 0.0000% · reasoning tokens: 7349 |
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| ### claude-haiku-4-5 (answered by claude-haiku-4-5-20251001) |
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| ``` |
| ANSWER: 21271 |
| ``` |
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| Parsed: 21271 · error: 0.0381% · reasoning tokens: 14239 |
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| ### claude-fable-5 |
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| ``` |
| ANSWER: 21263 |
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| Parsed: 21263 · error: 0.0005% · reasoning tokens: 2161 |
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| ## runway-9 |
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| **Question** |
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| ``` |
| A company has $750,000 in cash and no revenue. Monthly burn is $60,000 in months 1, 2 and 3, then increases by $10,000 every 3 months (so it steps up in month 4, again in month 7, and so on). In which month number does the cash balance first go below zero? |
| ``` |
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| **Expected** (computed in code): 11 |
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| ### claude-opus-5 |
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| ``` |
| ANSWER: 11 |
| ``` |
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| Parsed: 11 · error: 0.0000% · reasoning tokens: 157 |
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| ### claude-sonnet-5 |
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| ``` |
| ANSWER: 11 |
| ``` |
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| Parsed: 11 · error: 0.0000% · reasoning tokens: 205 |
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| ### claude-haiku-4-5 (answered by claude-haiku-4-5-20251001) |
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| ``` |
| ANSWER: 11 |
| ``` |
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| Parsed: 11 · error: 0.0000% · reasoning tokens: 972 |
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| ### claude-fable-5 |
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| ``` |
| ANSWER: 11 |
| ``` |
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| Parsed: 11 · error: 0.0000% · reasoning tokens: 101 |
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