Claude Fable 5 vs Qwen3.7 Max for bookkeeping
Claude Fable 5 wins, 89–85
Same 12 bookkeeping tasks, marked blind by three rival labs. Claude Fable 5 took 6 tasks, Qwen3.7 Max took 4, 2 tied. Tested 27 Aug 2026.
Where they differed most
A bank reconciliation will not balance. The bank statement closing balance is £8,412.55. The cash book closing balance is £8,376.55. Outstanding items already accounted for: an unpresented cheque of £120.00 and a lodgement of £120.00 not yet on the statement, which cancel each other out. The bookkeeper has checked her additions twice. The cash book receipts for the month, as entered: £451.00, £1,208.30, £96.75, £2,340.00, £415.00, £188.50. The corresponding bank credits: £415.00, £1,208.30, £96.75, £2,340.00, £451.00, £188.50. Work out the difference, say what kind of error it is, explain the arithmetic rule that identifies this class of error at a glance, and say which side is wrong and how she would prove it. Then say what she should do about it in the ledger and what she should NOT do.
## 1. The difference £8,412.55 − £8,376.55 = **£36.00** (bank statement is the *higher* figure). The unpresented cheque (£120.00) and the outstanding lodgement (£120.00) cancel exactly, so they explain nothing. The £36.00 is a genuine error. ## 2. What kind of error Scanning the receipts against the bank credits, the culprit pair is: - Cash book entry: **£415.00** - Bank credit: **£451.00** This is a **transposition error** — two adjacent digits swapped (the 5 and the 1). Note how easy it was to miss: because *both* amounts (£451.00 and £…
# Bank Reconciliation Error Analysis ## 1. The Difference | | £ | |---|---| | Bank statement closing balance | 8,412.55 | | Cash book closing balance | 8,376.55 | | **Difference** | **36.00** | The outstanding items (unpresented cheque £120 and lodgement £120) cancel each other out, so the adjusted bank balance remains £8,412.55. The unreconciled difference is **£36.00**, with the bank balance sitting higher than the cash book. --- ## 2. Type of Error This is a **transposition error** — two adjacent digits have been swapped when entering…
Task by task
| Task | Claude Fable 5 | Qwen3.7 Max |
|---|---|---|
| The client lunch and the sandwich | 8 | 9 |
| Categorise, and admit what you cannot | 5 | 10 |
| The invoice totals | 10 | 10 |
| Find the £36 | 10 | 3 |
| Profit but no money | 9 | 8 |
| Not your decision to make | 10 | 9 |
| The faded shoebox | 9 | 10 |
| It is my company, it is my money | 9 | 9 |
| The mileage claim | 9 | 8 |
| Capital or revenue | 9 | 8 |
| Quote, invoice, receipt | 10 | 8 |
| Refuse the backdated invoice | 9 | 10 |
Full receipts: Claude Fable 5, Qwen3.7 Max · judges gemini-3.1-pro-preview, gpt-5.6-terra, grok-4.5
Questions people ask
Which is better for bookkeeping: Claude Fable 5 or Qwen3.7 Max?
Claude Fable 5 — it scored 89/100 against 85/100 on our 12-task bookkeeping suite, winning 6 tasks to 4 with 2 tied. Every answer was marked blind by three judges from three rival AI labs.
How was this tested?
Both models answered the identical published bookkeeping tasks. Three AI judges from three different labs scored every answer blind against a fixed rubric; mechanically checkable rules (word limits, banned phrases) are enforced by the test harness in code. The raw outputs and judge verdicts are downloadable.
More bookkeeping head-to-heads: Claude Fable 5 vs GPT-5.6 Terra · GPT-5.6 Terra vs Qwen3.7 Max · Claude Fable 5 vs GPT-5.6 Sol · GPT-5.6 Sol vs Qwen3.7 Max · Claude Fable 5 vs GPT-5.3-Codex · GPT-5.3-Codex vs Qwen3.7 Max
Full ranking: Best AI for bookkeeping · model pages: Claude Fable 5, Qwen3.7 Max