Datasets:
Transcript — 2026-08-16
Models: claude-opus-5, claude-sonnet-5, claude-haiku-4-5, claude-fable-5. Seed 20260812. Tools and MCP disabled.
Command (prompt over stdin):
claude -p --output-format json --model <model> --tools "" --strict-mcp-config --mcp-config no-mcp.json
Expected values are computed in run.ts, never by a model.
mrr-0
Question
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?
Expected (computed in code): 38115.30678167854
claude-opus-5
ANSWER: 38115.31
Parsed: 38115.31 · error: 0.0000% · reasoning tokens: 936
claude-sonnet-5
ANSWER: 38115.31
Parsed: 38115.31 · error: 0.0000% · reasoning tokens: 5896
claude-haiku-4-5 (answered by claude-haiku-4-5-20251001)
ANSWER: $38,115
Parsed: 38115 · error: 0.0008% · reasoning tokens: 7710
claude-fable-5
ANSWER: 38115.34
Parsed: 38115.34 · error: 0.0001% · reasoning tokens: 1430
cash-1
Question
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?
Expected (computed in code): 4864506.921884278
claude-opus-5
ANSWER: 4864506.92
Parsed: 4864506.92 · error: 0.0000% · reasoning tokens: 1018
claude-sonnet-5
ANSWER: 4864506.96
Parsed: 4864506.96 · error: 0.0000% · reasoning tokens: 3281
claude-haiku-4-5 (answered by claude-haiku-4-5-20251001)
ANSWER: 4864544.82
Parsed: 4864544.82 · error: 0.0008% · reasoning tokens: 3873
claude-fable-5
ANSWER: 4864506.92
Parsed: 4864506.92 · error: 0.0000% · reasoning tokens: 1182
ltv-2
Question
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?
Expected (computed in code): 7800.000000000001
claude-opus-5
ANSWER: 7800
Parsed: 7800 · error: 0.0000% · reasoning tokens: 27
claude-sonnet-5
ANSWER: 7800
Parsed: 7800 · error: 0.0000% · reasoning tokens: 0
claude-haiku-4-5 (answered by claude-haiku-4-5-20251001)
ANSWER: 7800
Parsed: 7800 · error: 0.0000% · reasoning tokens: 161
claude-fable-5
ANSWER: 7800
Parsed: 7800 · error: 0.0000% · reasoning tokens: 33
two-phase-3
Question
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?
Expected (computed in code): 18578.74834305274
claude-opus-5
ANSWER: 18578.75
Parsed: 18578.75 · error: 0.0000% · reasoning tokens: 1665
claude-sonnet-5
ANSWER: 18578.73
Parsed: 18578.73 · error: 0.0001% · reasoning tokens: 10793
claude-haiku-4-5 (answered by claude-haiku-4-5-20251001)
ANSWER: 18553
Parsed: 18553 · error: 0.1386% · reasoning tokens: 13085
claude-fable-5
ANSWER: 18578.75
Parsed: 18578.75 · error: 0.0000% · reasoning tokens: 1148
runway-4
Question
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?
Expected (computed in code): 5
claude-opus-5
ANSWER: 5
Parsed: 5 · error: 0.0000% · reasoning tokens: 90
claude-sonnet-5
ANSWER: 5
Parsed: 5 · error: 0.0000% · reasoning tokens: 133
claude-haiku-4-5 (answered by claude-haiku-4-5-20251001)
ANSWER: 5
Parsed: 5 · error: 0.0000% · reasoning tokens: 355
claude-fable-5
ANSWER: 5
Parsed: 5 · error: 0.0000% · reasoning tokens: 104
mrr-5
Question
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?
Expected (computed in code): 14887.453040647115
claude-opus-5
ANSWER: 14887.45
Parsed: 14887.45 · error: 0.0000% · reasoning tokens: 338
claude-sonnet-5
ANSWER: 14887.45
Parsed: 14887.45 · error: 0.0000% · reasoning tokens: 1403
claude-haiku-4-5 (answered by claude-haiku-4-5-20251001)
ANSWER: 14887.54
Parsed: 14887.54 · error: 0.0006% · reasoning tokens: 10160
claude-fable-5
ANSWER: 14887.46
Parsed: 14887.46 · error: 0.0000% · reasoning tokens: 488
cash-6
Question
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?
Expected (computed in code): 5822959.304807226
claude-opus-5
ANSWER: 5822959
Parsed: 5822959 · error: 0.0000% · reasoning tokens: 1440
claude-sonnet-5
ANSWER: 5822959.31
Parsed: 5822959.31 · error: 0.0000% · reasoning tokens: 5427
claude-haiku-4-5 (answered by claude-haiku-4-5-20251001)
ANSWER: 5831410
Parsed: 5831410 · error: 0.1451% · reasoning tokens: 7051
claude-fable-5
ANSWER: 5822959
Parsed: 5822959 · error: 0.0000% · reasoning tokens: 1585
ltv-7
Question
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?
Expected (computed in code): 2346.842105263158
claude-opus-5
ANSWER: 2346.84
Parsed: 2346.84 · error: 0.0001% · reasoning tokens: 45
claude-sonnet-5
ANSWER: 2347.37
Parsed: 2347.37 · error: 0.0225% · reasoning tokens: 33
claude-haiku-4-5 (answered by claude-haiku-4-5-20251001)
ANSWER: 2346.32
Parsed: 2346.32 · error: 0.0222% · reasoning tokens: 421
claude-fable-5
ANSWER: 2346.84
Parsed: 2346.84 · error: 0.0001% · reasoning tokens: 42
two-phase-8
Question
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?
Expected (computed in code): 21262.901931922686
claude-opus-5
ANSWER: 21262.9
Parsed: 21262.9 · error: 0.0000% · reasoning tokens: 2055
claude-sonnet-5
ANSWER: 21262.91
Parsed: 21262.91 · error: 0.0000% · reasoning tokens: 7349
claude-haiku-4-5 (answered by claude-haiku-4-5-20251001)
ANSWER: 21271
Parsed: 21271 · error: 0.0381% · reasoning tokens: 14239
claude-fable-5
ANSWER: 21263
Parsed: 21263 · error: 0.0005% · reasoning tokens: 2161
runway-9
Question
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?
Expected (computed in code): 11
claude-opus-5
ANSWER: 11
Parsed: 11 · error: 0.0000% · reasoning tokens: 157
claude-sonnet-5
ANSWER: 11
Parsed: 11 · error: 0.0000% · reasoning tokens: 205
claude-haiku-4-5 (answered by claude-haiku-4-5-20251001)
ANSWER: 11
Parsed: 11 · error: 0.0000% · reasoning tokens: 972
claude-fable-5
ANSWER: 11
Parsed: 11 · error: 0.0000% · reasoning tokens: 101