{
  "recordVersion": 1,
  "status": "One completed and independently checked workflow; not an overall comparison verdict",
  "runId": "sales-returns-gemini-20261019-02",
  "dateUTC": "2026-10-19",
  "app": "Gemini",
  "round": 2,
  "surface": "Fresh ordinary browser conversation; no Gem, notebook, Canvas, Deep Research or agent mode selected.",
  "visibleConfiguration": {
    "plan": "No verified plan label or subscription price",
    "modelEntry": "Auto — Gemini 3 models",
    "thinkingLevel": "High — Extra thorough",
    "lockedAlternatives": [
      "3.1 Pro — Advanced reasoning",
      "4 Argon — Complex tasks"
    ],
    "perResponseLabels": {
      "P1": "Used 3.5 Flash-Lite High",
      "P2": "Used 3.5 Flash-Lite High",
      "P3": "Used 3.6 Flash with auto selection",
      "P4": "Used 3.6 Flash with auto selection"
    }
  },
  "configurationScope": "App-reported labels, not independent backend model identification. Auto configuration and per-response labels are distinct.",
  "operator": "AI browser operator working for Anomaly, using an existing authorized account",
  "reviewer": "Separate AI article writer working for Anomaly, with independently calculated CSV references and unchanged code/output checks",
  "notBlinded": true,
  "blindingDisclosure": "The operator directly read the answer key at 17:33:06.316 UTC and further return-rate blocks at 17:33:09.337 UTC, before P1 at 17:39:19.203 UTC. The coordinator verified the exact read commands in the original activity record. Only four frozen prompts were sent; no expected values or corrective hints.",
  "accountState": "Access inspection at 14:54 UTC observed memory from past chats OFF, instructions feature ON with none saved, and saved chat history. This operator did not re-inspect those settings. Skills, connected apps and Gems were not inspected. Fresh chat is not a guarantee of memory-free or instruction-free conditions.",
  "independenceDisclosure": "Vendor-authored, not blinded or independent of Anomaly. Unmatched subscriptions and account personalization across apps.",
  "input": {
    "name": "sales-returns-workbook.xlsx",
    "bytes": 2575274,
    "sha256": "5d25f5d9d877c895736cf91361de94742a8f50af8f4d74a1ea2240929e17f3ed",
    "url": "../sales-returns-workbook.xlsx",
    "provenance": "Frozen synthetic five-sheet workbook",
    "upload": "Browser-created File/DataTransfer bytes hash checked. All five sheets read. Stored upload bytes were not retrieved back from the app."
  },
  "reference": {
    "url": "../reference-values.csv",
    "method": "Frozen SQL reference with independent JavaScript and Python/CSV checks"
  },
  "promptsAndInputDownload": "../comparison-workbook-and-checks-v1.zip",
  "prompts": [
    {
      "prompt": "P1",
      "frozenTextSHA256": "1c8b1438a8f114ec1cc373471362742dacfcfcda12e4b9b284634cec1e1df6ad",
      "sentUTC": "2026-10-19T17:39:19.203Z",
      "stopButtonGoneUTC": "2026-10-19T17:39:45.196Z",
      "secondsToStopButtonGone": 26.0,
      "finalTextLengthUTC": "2026-10-19T17:40:05.776Z",
      "secondsToFinalTextLength": 46.6,
      "animationEndedUTC": "2026-10-19T17:40:30.872Z",
      "secondsToAnimationEnd": 71.7,
      "responseLabel": "Used 3.5 Flash-Lite High",
      "analysisLabel": "Used Analysis",
      "firstAttempt": "Completed",
      "recoveryUsed": false
    },
    {
      "prompt": "P2",
      "frozenTextSHA256": "a1284f6c7ad6554a50ca9eb2ee834fe772e1d7151b73d97d4f61c64a20fee68c",
      "sentUTC": "2026-10-19T17:42:16.917Z",
      "stopButtonGoneUTC": "2026-10-19T17:42:39.833Z",
      "secondsToStopButtonGone": 22.9,
      "finalTextLengthUTC": "2026-10-19T17:42:44.257Z",
      "secondsToFinalTextLength": 27.3,
      "animationEndedUTC": "2026-10-19T17:43:06.135Z",
      "secondsToAnimationEnd": 49.2,
      "responseLabel": "Used 3.5 Flash-Lite High",
      "analysisLabel": "Used Analysis",
      "firstAttempt": "Completed",
      "recoveryUsed": false
    },
    {
      "prompt": "P3",
      "frozenTextSHA256": "5267ae75957ef85ea20be20a5965d6e6ba81c5563278de20f6f3da6136db9362",
      "sentUTC": "2026-10-19T17:44:13.882Z",
      "stopButtonGoneUTC": "2026-10-19T17:44:30.824Z",
      "secondsToStopButtonGone": 16.9,
      "finalTextLengthUTC": "2026-10-19T17:44:40.887Z",
      "secondsToFinalTextLength": 27.0,
      "animationEndedUTC": "2026-10-19T17:45:29.271Z",
      "secondsToAnimationEnd": 75.4,
      "responseLabel": "Used 3.6 Flash with auto selection",
      "analysisLabel": "Used Analysis",
      "firstAttempt": "Completed",
      "recoveryUsed": false
    },
    {
      "prompt": "P4",
      "frozenTextSHA256": "c7bf19a8bd57a33677e5d3931ba46ca88f06ee642f9c1754d578a363b44583b0",
      "sentUTC": "2026-10-19T17:48:00.441Z",
      "stopButtonGoneUTC": "2026-10-19T17:48:24.240Z",
      "secondsToStopButtonGone": 23.8,
      "finalTextLengthUTC": "2026-10-19T17:48:32.737Z",
      "secondsToFinalTextLength": 32.3,
      "animationEndedUTC": "2026-10-19T17:48:59.965Z",
      "secondsToAnimationEnd": 59.5,
      "responseLabel": "Used 3.6 Flash with auto selection",
      "analysisLabel": "Used Analysis",
      "firstAttempt": "Completed",
      "recoveryUsed": false
    }
  ],
  "timingDefinition": "Stop-button disappearance, final text length and animation end are different observed events. The shared browser tab was hidden; screenshot-forced rendering affected later events. Stop-button disappearance is a proxy, not a verified exact generation duration. No unqualified user-perceived latency comparison or speed score.",
  "access": {
    "allFourPromptsCompletedFirstAttempt": true,
    "clarificationQuestions": 0,
    "recoveryMessages": 0,
    "inConversationQuotaOrAccessBlock": false,
    "beforePromptEvents": [
      "HTTP 503 page on initial navigation",
      "Something went wrong (3) toast on retry; loading later completed"
    ],
    "composerPreparation": "Failed insertions and two small test strings were cleared without sending. Frozen composer hashes were verified before actual sends.",
    "firstPartyPreviewService": "Opening the workbook sent the synthetic file to Google’s built-in viewer service. No Drive file creation was established; no third-party connector approval or private external data access was observed."
  },
  "checks": [
    {
      "id": "N1",
      "check": "All five sheet row counts",
      "result": "PASS",
      "reason": null,
      "observed": "Sales 12,120 (12,000 unique values); Returns 600; Products 24; Categories 5; Regions 4 (table in the answer; its code printed the same)",
      "reference": "Sales 12120 raw (12000 unique); Returns 600; Products 24; Categories 5; Regions 4",
      "note": ""
    },
    {
      "id": "N2",
      "check": "Key columns and uniqueness",
      "result": "PASS",
      "reason": null,
      "observed": "Sales line_id: Is Unique? No (12,000 unique of 12,120, 120 exact duplicate rows); return_id, product_id, category_id, region_id: Yes",
      "reference": "Sales line_id not unique; other keys unique",
      "note": ""
    },
    {
      "id": "N3",
      "check": "Date extents",
      "result": "PASS",
      "reason": null,
      "observed": "Sales order_date 2026-01-01 to 2026-06-30; Returns return_date 'Ranges from 2026-03? (Correction: Ranges from 2026-01-03 to 2026-06-30)'",
      "reference": "2026-01-01..2026-06-30; 2026-01-03..2026-06-30",
      "note": "The final stated Returns range is exact. A visible garbled self-correction ('2026-03?') was left in the answer text: separate explanation-quality defect D1, not a number failure."
    },
    {
      "id": "N4",
      "check": "Three required data-quality observations",
      "result": "PASS",
      "reason": null,
      "observed": "(a) 120 exact duplicate rows in Sales (12,000 unique of 12,120); (b) category C5 has zero products and zero sold units; (c) 'no price, revenue, or cost columns' (stated in the 'cannot be made' section)",
      "reference": "DQ1 120 repeated rows; DQ2 category with no products (C5); DQ3 no price/revenue column",
      "note": "(a), (b), (c) each found; no wrong number and no false issue claimed. (c) sits in section 4 (what cannot be calculated) rather than the data-quality list."
    },
    {
      "id": "N5",
      "check": "Rows before and after deduplication",
      "result": "PASS",
      "reason": null,
      "observed": "'Before Deduplication: 12,120 rows'; 'left 12,000 unique rows'",
      "reference": "12120 raw; 12000 unique",
      "note": ""
    },
    {
      "id": "N6",
      "check": "Six monthly units totals",
      "result": "FAIL",
      "reason": null,
      "observed": "No monthly totals are stated. The answer gives one 120-row month x category x region table (no separate by-month table). Month sums of that table: 2026-01 3,419; 02 3,375; 03 3,469; 04 3,553; 05 3,653; 06 3,331",
      "reference": "2026-01 3456; 02 3761; 03 4872; 04 5643; 05 6815; 06 8559",
      "note": "The table is wrong, not only differently shaped: 81 of its 120 cells differ from the correct aggregation (all 81 are non-zero cells after the first 15 rows, which are the 15 rows the app's visible code cell printed with head(15)). Re-running the app's own code unchanged gives 0 differing cells, so the code was right and the reported table was not what it produced."
    },
    {
      "id": "N7",
      "check": "Five category units totals",
      "result": "FAIL",
      "reason": null,
      "observed": "No category totals stated. Seasonal Gifts (C5) is kept, 0 in all 24 rows (correct). Category sums of the reported table: Kitchen 5,857; Outdoor 5,107; Office 5,376; Pet Supplies 4,460; Seasonal Gifts 0",
      "reference": "Kitchen 9014; Outdoor 8535; Office 8668; Pet Supplies 6889; Seasonal Gifts 0",
      "note": "C5 kept and shown as 0 is correct (that part would pass); C1-C4 are not exact under any reading."
    },
    {
      "id": "N8",
      "check": "Four regional units totals",
      "result": "FAIL",
      "reason": null,
      "observed": "No region totals stated. Region sums of the reported table: North 7,093; South 5,826; East 5,031; West 2,850",
      "reference": "North 11067; South 9090; East 7271; West 5678",
      "note": ""
    },
    {
      "id": "N9",
      "check": "Grand total and reconciliation",
      "result": "FAIL",
      "reason": null,
      "observed": "'Grand Total Units Sold (Jan-Jun 2026): 33,106 units' (exact) but the reported 120-row table sums to 20,800",
      "reference": "33106; monthly, category and region totals each sum to it",
      "note": "The grand total itself is exact; the rule also needs the displayed breakdown to sum to it, which it does not."
    },
    {
      "id": "N10",
      "check": "Category return numerators and denominators",
      "result": "PASS",
      "reason": null,
      "observed": "Kitchen 244/9,014; Outdoor 460/8,535; Office 160/8,668; Pet Supplies 288/6,889 (returned/sold)",
      "reference": "244/9014; 460/8535; 160/8668; 288/6889",
      "note": ""
    },
    {
      "id": "N11",
      "check": "Category return rates",
      "result": "PASS",
      "reason": null,
      "observed": "2.71%; 5.39%; 1.85%; 4.18%",
      "reference": "2.71; 5.39; 1.85; 4.18",
      "note": ""
    },
    {
      "id": "N12",
      "check": "No-sales category rate",
      "result": "PASS",
      "reason": null,
      "observed": "Seasonal Gifts: 0 returned, 0 sold, 'UNDEFINED', explained from Definition #5 (zero sold units, 0/0)",
      "reference": "undefined with reason",
      "note": ""
    },
    {
      "id": "J1",
      "check": "Duplicate-safe joins",
      "result": "PASS",
      "reason": null,
      "observed": "P3 returned units 244/460/160/288 (not the fan-out values 248/472/167/293); sales deduplicated before the join (drop_duplicates, then merge)",
      "reference": "no fan-out",
      "note": "P2 contributes no join-fan-out evidence either way (its table is wrong for a different reason)."
    },
    {
      "id": "J2",
      "check": "Complete output groups",
      "result": "PASS",
      "reason": null,
      "observed": "All 5 categories (Seasonal Gifts included), 4 regions, 6 months present in the P2 table; all 5 categories in the P3 table",
      "reference": "5 categories, 4 regions, 6 months",
      "note": ""
    },
    {
      "id": "J3",
      "check": "No invented period or financial values",
      "result": "PASS",
      "reason": null,
      "observed": "No months after June, no revenue or money amounts in any answer, table, chart or file",
      "reference": "none",
      "note": ""
    },
    {
      "id": "F1",
      "check": "Chart agrees with checked monthly totals",
      "result": "PASS",
      "reason": null,
      "observed": "Chart PNG (2700x1500): six bars 2026-01..2026-06 labelled 3,456 / 3,761 / 4,872 / 5,643 / 6,815 / 8,559; axes 'Month' and 'Units Sold'; no month after June. Same values in the response table, the generating code output and the XLSX",
      "reference": "3456; 3761; 4872; 5643; 6815; 8559",
      "note": ""
    },
    {
      "id": "F2",
      "check": "Exactly three supported findings",
      "result": "PASS",
      "reason": null,
      "observed": "Three findings: (1) growth every month, 3,456 -> 8,559, +147.66%; (2) June highest, 8,559 = 25.85% of 33,106; (3) monthly return rate between 3.00% (June) and 4.44% (February), overall 3.48% (1,152 / 33,106)",
      "reference": "computed from the key: +147.66%, 25.85%, order-month rates 3.00..4.44, 3.48",
      "note": "Every figure reconciles; no causal or financial claim. The text does not say the rates attribute returns to the order month (the code does; values equal return_rate_by_order_month): recorded as unclear basis D8, checkable values correct."
    },
    {
      "id": "W1",
      "check": "Reproducible supplied working",
      "result": "PASS",
      "reason": null,
      "observed": "Writer replayed complete P2 final code unchanged: all 120 detail cells are correct; separate marginal tables are not produced. P4 final code runs unchanged and reproduces the monthly numbers. Operator separately replayed the chart/workbook generating cell and reported cell-for-cell XLSX agreement; writer inspected the actual delivered file. Correct code does not repair the wrong P2 displayed table.",
      "reference": "units_by_*, return rates",
      "note": "Defects (separate): the code printed in the P4 answer text reproduces only the numbers, not the chart or XLSX (that code is in the collapsed cell, D5); P2's visible cell output shows only 15 of the 120 rows, and the reported table is not what the code produces (see W2)."
    },
    {
      "id": "W2",
      "check": "Working agrees with reported counts and tables",
      "result": "FAIL",
      "reason": null,
      "observed": "The shown working (row counts 12,120 -> 12,000, steps, code) is consistent, but the reported 120-row table is not the output of that code: re-running the code unchanged gives different values for 81 of 120 cells; the table sums to 20,800 against the stated total 33,106",
      "reference": "working matches reported numbers",
      "note": "Only the first 15 table rows appear in any displayed code output; the other 105 rows are not backed by displayed output."
    },
    {
      "id": "E1",
      "check": "Delivered files retrieved and reopened",
      "result": "PASS",
      "reason": null,
      "observed": "Two files retrieved in-page and reopened: chart PNG (opens, six bars with the reference values) and XLSX (opens in openpyxl and LibreOffice; Monthly Summary B2:B7 3456..8559, C2:C7 133..257, Total after recalculation 33,106 / 1,152 / 3.48%; Category Summary C1..C5 9014/8535/8668/6889/0 sold, 244/460/160/288/0 returned, C5 rate formula yields UNDEFINED)",
      "reference": "units_by_month, units_by_category (and return rates)",
      "note": "Values equal the key and the chat table. Region units are not in the files (not asked for in P4). Caveat D6: formula cells carry no cached values, so readers that do not recalculate (openpyxl data_only, pandas) show blank Totals and blank category rates; LibreOffice recalculates them correctly."
    },
    {
      "id": "E2",
      "check": "XLSX summary values",
      "result": "PASS",
      "reason": null,
      "observed": "XLSX produced ('Your XLSX summary workbook is ready'), 8,069 bytes, two sheets, opens and equals the reference",
      "reference": "XLSX equals reference",
      "note": ""
    },
    {
      "id": "E3",
      "check": "Claimed workbook editability",
      "result": "NOT-ASSESSED",
      "reason": "NA-NOT-CLAIMED",
      "observed": "The response text does not claim formulas or a chart object (it says the workbook 'is ready').",
      "reference": "only if claimed",
      "note": "Inspected anyway as supplementary facts: 11 formulas (SUM, ratio, IF with UNDEFINED); one native clustered column chart referencing 'Monthly Summary'!A2:A7 / B2:B7; a controlled change (B2 + 1,000) recalculated B8 to 34,106 and D8 in LibreOffice. The app's own in-browser viewer drew the chart as one bar with a 'Month' category (viewer rendering; LibreOffice draws six bars)."
    }
  ],
  "scoringNote": "22 separate checks: 16 PASS, 5 FAIL (N6–N9, W2), 1 NOT-ASSESSED(E3/NA-NOT-CLAIMED). No weighted score or accuracy percentage. Completion, access, timing and cost are separate.",
  "mainDistinction": "P2 final chat table has 81 wrong cells and totals 20,800 despite a correct stated 33,106; its code reproduces the correct grid. P3 return rates and P4 monthly files are correct. Later correct outputs do not repair first-attempt P2 failures.",
  "files": [
    {
      "name": "monthly_units_chart.png",
      "bytes": 112260,
      "sha256": "6fdd4d776088c7cb97ab87df4196ddd43b01a0091a891b6c9ff9bb46918dd4f4",
      "url": "/blog/best-ai-model-for-data-analysis/r2-gemini/monthly_units_chart.png",
      "kind": "Unmodified app-delivered file",
      "scope": "Correct P4 monthly/category output; does not repair the earlier incorrect P2 chat table."
    },
    {
      "name": "sales_returns_summary_jan_jun_2026.xlsx",
      "bytes": 8069,
      "sha256": "4cc50f52b8cb33a64bf3f6e09663ec585d8532ed50f0fb006526ff6929d288b3",
      "url": "/blog/best-ai-model-for-data-analysis/r2-gemini/sales_returns_summary_jan_jun_2026.xlsx",
      "kind": "Unmodified app-delivered file",
      "scope": "Correct P4 monthly/category output; does not repair the earlier incorrect P2 chat table."
    }
  ],
  "retrievalMethod": "Operator clicked Download the image and the workbook viewer Download control. In-page hooks captured the actual file bytes/URL, suppressing native new-window/anchor actions; files were fetched in-page and page hashes matched VM copies. Native Mac download completion was not tested. Hooks were removed by the later page reload.",
  "verification": {
    "originalValueChecks": 44,
    "recalculatedValueChecks": 55,
    "formulas": 11,
    "nativeCharts": 1,
    "originalFormulaCachesAbsent": 11,
    "originalWorkbookLimit": "Non-recalculating readers show blank formula totals/category rates. LibreOffice recalculation yields correct totals, rates and C5 UNDEFINED.",
    "viewerLimitation": "The app’s built-in workbook preview displayed one blue bar despite six correct monthly rows. The delivered PNG and native chart data are correct; LibreOffice produces six points. The preview cause is unestablished.",
    "P4Reproduction": "The final-answer Python reproduces monthly numbers; chart/workbook generation code is in the app’s separate code panel.",
    "controlledEdit": "E3 was not claimed. Writer did not perform a controlled edit; operator separately checked an aggregate +1,000 change, which is not treated as an editability-score pass.",
    "manualMicrosoftExcelSessionTested": false,
    "monthlyReturnBasis": "Linked sale/order month, explicit in code but not named in the prose finding."
  },
  "usageAndPrice": "Usage showed10% before and 3% after across a reset window; weekly 0%→1%. Shared-account values cannot be attributed to this workflow. The INR 399/month AI Plus promotion is not proof of the current plan or subscription price.",
  "limitations": [
    "One synthetic fixture, one workflow and one date. Three workflows per app do not estimate population reliability.",
    "No underlying-model, large-file, native add-in, statistical-inference or unattended-refresh conclusion.",
    "Two correct delivered files do not repair the wrong earlier chat table.",
    "App result captures were inspected privately; this package excludes raw captures, transcripts, reasoning panels, account URLs and operator identifiers."
  ]
}