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missing_balance

missing_balance-2026300000

The opening balance is gone: the answer is uncomputable.

expects missing_balance

Statement files

These files are the untouched baseline for seed 2026300000.

bnp_camt053.xmlUntouched by this perturbation
<?xml version='1.0' encoding='utf-8'?>
<Document xmlns="urn:iso:std:iso:20022:tech:xsd:camt.053.001.02">
<BkToCstmrStmt>
<GrpHdr>
<MsgId>LB-acct-2026300000-2-2025-01-31</MsgId>
<CreDtTm>2025-01-31T23:59:00+00:00</CreDtTm>
</GrpHdr>
<Stmt>
<Id>acct-2026300000-2</Id>
<ElctrncSeqNb>1</ElctrncSeqNb>
<CreDtTm>2025-01-31T23:59:00+00:00</CreDtTm>
<FrToDt>
<FrDtTm>2025-01-01T00:00:00+00:00</FrDtTm>
<ToDtTm>2025-01-31T23:59:59+00:00</ToDtTm>
</FrToDt>
<Acct>
<Id>
<IBAN>GB68LBEN84775446887589</IBAN>
</Id>
<Ccy>GBP</Ccy>
</Acct>
<Bal>
<Tp>
<CdOrPrtry>
<Cd>OPBD</Cd>
</CdOrPrtry>
</Tp>
<Amt Ccy="GBP">47881.18</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Dt>
<Dt>2025-01-01</Dt>
</Dt>
</Bal>
<Ntry>
<Amt Ccy="GBP">4283.70</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-01-02</Dt>
</BookgDt>
<ValDt>
<Dt>2025-01-02</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300000-2-t006</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>TFR KESTREL INSURANCE REF718289</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">6571.59</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-01-03</Dt>
</BookgDt>
<ValDt>
<Dt>2025-01-03</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300000-2-t014</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>FPI GREENHOLM FOODS REF833193</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">10937.77</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-01-04</Dt>
</BookgDt>
<ValDt>
<Dt>2025-01-04</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300000-2-t016</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>FPI LARKSPUR TRAVEL REF416961</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">4566.90</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-01-06</Dt>
</BookgDt>
<ValDt>
<Dt>2025-01-06</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300000-2-t013</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>DD EASTFIELD ENERGY REF606629</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">11622.65</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-01-07</Dt>
</BookgDt>
<ValDt>
<Dt>2025-01-07</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300000-2-t007</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>BP MOORLAND TELECOM REF711137</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">4636.53</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-01-08</Dt>
</BookgDt>
<ValDt>
<Dt>2025-01-08</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300000-2-t005</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>BP DELPHINIUM MEDIA REF950647</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">12893.19</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-01-08</Dt>
</BookgDt>
<ValDt>
<Dt>2025-01-08</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300000-2-t012</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>TFR OSPREY LEASING REF711777</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">9073.60</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-01-10</Dt>
</BookgDt>
<ValDt>
<Dt>2025-01-10</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300000-2-t003</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>BP FENWICK &amp; PARTNERS REF782575</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">14144.97</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-01-10</Dt>
</BookgDt>
<ValDt>
<Dt>2025-01-10</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300000-2-t018</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>SO AURORA CONSULTING LTD REF227307</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">5013.79</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-01-15</Dt>
</BookgDt>
<ValDt>
<Dt>2025-01-15</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300000-2-t002</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>SO AURORA CONSULTING LTD REF430738</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">5241.39</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-01-15</Dt>
</BookgDt>
<ValDt>
<Dt>2025-01-15</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300000-2-t010</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>SO DELPHINIUM MEDIA REF975066</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">7786.51</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-01-15</Dt>
</BookgDt>
<ValDt>
<Dt>2025-01-15</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300000-2-t015</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>FPO MOORLAND TELECOM REF666209</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">13896.58</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-01-16</Dt>
</BookgDt>
<ValDt>
<Dt>2025-01-16</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300000-2-t017</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>TFR OSPREY LEASING REF142831</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">1831.87</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-01-20</Dt>
</BookgDt>
<ValDt>
<Dt>2025-01-20</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300000-2-t001</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>BP FENWICK &amp; PARTNERS REF230521</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">1415.91</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-01-21</Dt>
</BookgDt>
<ValDt>
<Dt>2025-01-21</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300000-2-t008</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>CR HARBOURLIGHT IT REF325192</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">13754.64</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-01-24</Dt>
</BookgDt>
<ValDt>
<Dt>2025-01-24</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300000-2-t020</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>CR LARKSPUR TRAVEL REF986796</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">14651.35</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-01-25</Dt>
</BookgDt>
<ValDt>
<Dt>2025-01-25</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300000-2-t011</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>FPI HARBOURLIGHT IT REF513015</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">14973.38</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-01-26</Dt>
</BookgDt>
<ValDt>
<Dt>2025-01-26</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300000-2-t009</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>BP FENWICK &amp; PARTNERS REF951521</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">9620.14</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-01-26</Dt>
</BookgDt>
<ValDt>
<Dt>2025-01-26</Dt>
</ValDt>
<AcctSvcrRef>acct-2026300000-2-t019</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>DD NORTHGATE CLEANING REF512429</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">5736.20</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-01-30</Dt>
hsbc_statement.xlsxUntouched by this perturbation
[sheet: Statement]
HSBC Bank plc
Business Current Account Statement
Account name: LEDGERBENCH DEMO LTD
Sort code / Account number: 21-13-89 87506639
Account reference: acct-2026300000-1
Statement period: 01 Jan 2025 to 31 Jan 2025
Currency: GBP
Date Payment type Details Paid out Paid in
01 Jan 2025 CR LARKSPUR TRAVEL REF211316 8604.62
01 Jan 2025 DD DELPHINIUM MEDIA REF773349 3026.10
03 Jan 2025 DD HARBOURLIGHT IT REF867012 6132.68
03 Jan 2025 FPI MOORLAND TELECOM REF164059 12380.18
04 Jan 2025 CR AURORA CONSULTING LTD REF871285 10022.88
05 Jan 2025 DD CASTLEGATE PROPERTY REF541726 10173.81
09 Jan 2025 FPO BRAMBLE LOGISTICS REF725307 5088.66
10 Jan 2025 SO FENWICK & PARTNERS REF450820 8991.31
11 Jan 2025 FPO HARBOURLIGHT IT REF536259 8152.43
13 Jan 2025 SO EASTFIELD ENERGY REF816240 14073.36
14 Jan 2025 TFR GREENHOLM FOODS REF706513 5591.58
14 Jan 2025 CR GREENHOLM FOODS REF862664 6911.69
17 Jan 2025 DD JUNIPER PAYROLL REF807050 1566.07
17 Jan 2025 FPO AURORA CONSULTING LTD REF499123 7001.93
20 Jan 2025 SO KESTREL INSURANCE REF899274 12440.50
20 Jan 2025 CR LARKSPUR TRAVEL REF529223 11723.45
22 Jan 2025 CR KESTREL INSURANCE REF361605 8078.70
22 Jan 2025 DD IRONBRIDGE TOOLING REF593785 7654.49
22 Jan 2025 BP KESTREL INSURANCE REF800931 7535.39
23 Jan 2025 FPI KESTREL INSURANCE REF653995 10061.46
23 Jan 2025 DD AURORA CONSULTING LTD REF488930 3369.30
24 Jan 2025 FPI DELPHINIUM MEDIA REF320947 2867.11
25 Jan 2025 CR HARBOURLIGHT IT REF433303 7369.36
25 Jan 2025 SO OSPREY LEASING REF315734 8599.25
25 Jan 2025 DD JUNIPER PAYROLL REF294583 8665.12
26 Jan 2025 SO OSPREY LEASING REF322741 3477.68
27 Jan 2025 FPI DELPHINIUM MEDIA REF157170 14487.31
27 Jan 2025 SO AURORA CONSULTING LTD REF629164 9094.39
27 Jan 2025 BP MOORLAND TELECOM REF876413 11547.39
27 Jan 2025 FPO JUNIPER PAYROLL REF586924 13078.43
rbs_transactions.csvUntouched by this perturbation
"Date","Type","Description","Value","Account Name","Account Number","Ledger Ref"
"01/01/2025","BAL","OPENING BALANCE","79841.96","LEDGERBENCH DEMO LTD","48-23-36 62292405","acct-2026300000-3"
"02/01/2025","CR","CR AURORA CONSULTING LTD REF553519","11765.52","LEDGERBENCH DEMO LTD","48-23-36 62292405","acct-2026300000-3"
"06/01/2025","FPI","FPI KESTREL INSURANCE REF222636","5718.71","LEDGERBENCH DEMO LTD","48-23-36 62292405","acct-2026300000-3"
"07/01/2025","SO","SO JUNIPER PAYROLL REF205658","-1592.79","LEDGERBENCH DEMO LTD","48-23-36 62292405","acct-2026300000-3"
"09/01/2025","FPO","FPO JUNIPER PAYROLL REF347825","-2551.75","LEDGERBENCH DEMO LTD","48-23-36 62292405","acct-2026300000-3"
"09/01/2025","TFR","TFR OSPREY LEASING REF495986","9651.16","LEDGERBENCH DEMO LTD","48-23-36 62292405","acct-2026300000-3"
"10/01/2025","SO","SO GREENHOLM FOODS REF582466","-12616.64","LEDGERBENCH DEMO LTD","48-23-36 62292405","acct-2026300000-3"
"11/01/2025","DD","DD JUNIPER PAYROLL REF895844","-13162.04","LEDGERBENCH DEMO LTD","48-23-36 62292405","acct-2026300000-3"
"14/01/2025","FPI","FPI AURORA CONSULTING LTD REF320436","12725.02","LEDGERBENCH DEMO LTD","48-23-36 62292405","acct-2026300000-3"
"14/01/2025","BP","BP OSPREY LEASING REF943481","-14221.99","LEDGERBENCH DEMO LTD","48-23-36 62292405","acct-2026300000-3"
"16/01/2025","BP","BP CASTLEGATE PROPERTY REF905742","-923.94","LEDGERBENCH DEMO LTD","48-23-36 62292405","acct-2026300000-3"
"16/01/2025","TFR","TFR IRONBRIDGE TOOLING REF163631","4727.99","LEDGERBENCH DEMO LTD","48-23-36 62292405","acct-2026300000-3"
"22/01/2025","FPI","FPI JUNIPER PAYROLL REF528706","13790.95","LEDGERBENCH DEMO LTD","48-23-36 62292405","acct-2026300000-3"
"23/01/2025","FPI","FPI DELPHINIUM MEDIA REF338672","9840.86","LEDGERBENCH DEMO LTD","48-23-36 62292405","acct-2026300000-3"
"24/01/2025","CR","CR EASTFIELD ENERGY REF110700","4026.49","LEDGERBENCH DEMO LTD","48-23-36 62292405","acct-2026300000-3"
"25/01/2025","FPO","FPO FENWICK & PARTNERS REF125138","-12560.98","LEDGERBENCH DEMO LTD","48-23-36 62292405","acct-2026300000-3"
"26/01/2025","SO","SO NORTHGATE CLEANING REF475078","-6797.32","LEDGERBENCH DEMO LTD","48-23-36 62292405","acct-2026300000-3"
"27/01/2025","BP","BP LARKSPUR TRAVEL REF473753","-9086.87","LEDGERBENCH DEMO LTD","48-23-36 62292405","acct-2026300000-3"
"28/01/2025","DD","DD KESTREL INSURANCE REF764353","-14260.46","LEDGERBENCH DEMO LTD","48-23-36 62292405","acct-2026300000-3"
"28/01/2025","CR","CR LARKSPUR TRAVEL REF234110","12935.96","LEDGERBENCH DEMO LTD","48-23-36 62292405","acct-2026300000-3"
"29/01/2025","TFR","TFR DELPHINIUM MEDIA REF492024","12369.11","LEDGERBENCH DEMO LTD","48-23-36 62292405","acct-2026300000-3"
"30/01/2025","FPO","FPO LARKSPUR TRAVEL REF615114","-1431.77","LEDGERBENCH DEMO LTD","48-23-36 62292405","acct-2026300000-3"
 

Ground truth

Public here because the benchmark is open; it is the model's prompt path that can never reach these values, not human readers.

AccountClosing balance
acct-2026300000-1−£38,363.18
acct-2026300000-2£17,689.11
acct-2026300000-3£88,187.18

Recorded runs on this case

  • wrongSingle prompt2 steps · 9,913 tokens · Confidence low

    Model claude-sonnet-4-6Measured 2026-08-20Bench v1.0Run 11eaa71b2d02Commit 3d38c30

  • wrongAgent with tools22 steps · 56,928 tokens · Confidence high

    Model claude-sonnet-4-6Measured 2026-08-20Bench v1.0Run f140aa1e57f4Commit 384d72d

Step through any of these on the demo page.