AI Demos Research — the structured-intelligence platform. Every verdict on these pages opens to the execution behind it.
Graded 17 October 2026

Does Upstage AI process a scanned page inside a mixed PDF instead of skipping it?

Upstage AI processed the scanned page inside the mixed PDF instead of skipping it. The scanned worksheet appears in place between the two digital pages, and the service reports all three pages processed with OCR on; the scanned page also returns the most elements, with only small spacing and punctuation changes.

1 of 1 test case passed

Every test case in this scenario has a result.

Pass rate100%1 of 1 gradable
Coverage1 of 1test case with a result
1PassDid everything it was expected to do.
0FailNo test case failed.
0Not gradableEvery result here could be graded.
0UntestedEvery test case in this scenario has a result.
The pass rate is a summary. The evidence is the test case below: what we sent, what we checked, what the tool returned, and the proof.

The test case

Each test case is judged on its own: Pass, Fail, Not gradable, or Untested. The scenario result above is based on this test case.

Mixed pages — scanned page not skippedPassEvidence
What we sent
InputDocument (PDF)
Input PDF: mixed report with a scanned worksheet on page 2
Open the PDF ↗
What the tool returned
Markdownthe whole file · copied lines 38–86 marked
Kirkhollow Analytical Laboratories Ltd

Job KAL-ESR-4471

Equipment service report

CLIENT
Braithe Estuary Partnership
Estuary House, Vardenne Quay
Braithe BR3 4LN

| Job reference | KAL-ESR-4471 |
| --- | --- |
| Date of visit | 29 January 2026 |
| Engineer | R. Tarbert |
| Instrument | Kestrel 400 turbidity analyser |
| Location | Vardenne Quay pumping station |
| Service interval | Twelve months |


Reported fault

Intermittent baseline noise on channel 2, reported by the Partnership on 21 January. The analyser had
been running without attention since the annual service in January 2025.

Work carried out

The flow cell was removed, stripped and cleaned, and the pump tubing set replaced. The optical window
was found to be lightly fouled on the inner face; it was cleaned rather than replaced, and should be
inspected again at the next visit. The analyser was recalibrated against the two-point standards and left
running on channel 2 for an hour before the site was handed back. The completed worksheet is bound in
as page 2 of this report.

KAL-ESR-4471

Page 1 of 3

Kirkhollow Analytical Laboratories Ltd
Service worksheet

FIELD SERVICE

| Job reference | KAL-ESR-4471 |
| --- | --- |
| Instrument serial | GK-2214-77 |
| Engineer | R. Tarbert |
| Date | 29·January 2026 |


CHECKS AND READINGS

| Flow cell condition on arrival | Fouled, inner face |
| --- | --- |
| Flow cell pressure after service | 2.4 bar |
| Zero drift over 30 minutes | 0.003 mg/l |
| Span recovery against standard | 99.4 per cent |
| Lamp hours at service | 8,140 |
| Result | Pass |


Calibration certificate SR-4471/2

Analyser left in service on channel 2. Optical window to be inspected at the next visit.

# TIME ON SITE

| Arrived | 29 January 2026, 09:15 |
| --- | --- |
| Left | 29 January 2026, 13:40 |
| Chargeable time | 4 hours 25 minutes |
| Next service due | January 2027 |


# RECEIVED BY

| Name | M. Cairney |
| --- | --- |
| Position | Duty operator, Vardenne Quay |
| Date | 29 January 2026 |


Engineer's signature

Service worksheet · KAL-ESR-4471

Page2of3

Kirkhollow Analytical Laboratories Ltd

Job KAL-ESR-4471

# Parts fitted

| Part | Code | Quantity |
| --- | --- | --- |
| Pump tubing set | PT-114 | 1 |
| Flow cell O-ring, 12 mm | OR-0912 | 2 |
| Inlet filter, 40 micron | IF-4004 | 1 |


Declaration

The work described in this report was carried out to the standard set out in the service agreement. The
analyser was left in service and calibrated. The next annual service falls due in January 2027.

| Engineer | R. Tarbert |
| --- | --- |
| Countersigned | Dr A. J. Prosser |
| Report issued | 2 February 2026 |


KAL-ESR-4471

Page 3 of 3

Markdown output: the scanned page transcribed between the digital pages

Copied from Output file (Markdown), lines 38–86

Open the Markdown file ↗
Key momentsline 47
Output file (JSON)
JSON response: all three pages processed with OCR on
Cited values5 values from this file · long text shortened
usage
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elements
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model
document-parse-260630
api
2.0
ocr
true
Show the whole file (31 KB)
JSON
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    "html": "<header id='0' style='font-size:14px'>Kirkhollow Analytical Laboratories Ltd</header>\n<br><header id='1' style='font-size:14px'>Job KAL-ESR-4471</header>\n<br><p id='2' data-category='paragraph' style='font-size:22px'>Equipment service report</p>\n<p id='3' data-category='paragraph' style='font-size:16px'>CLIENT<br>Braithe Estuary Partnership<br>Estuary House, Vardenne Quay<br>Braithe BR3 4LN</p>\n<table id='4' style='font-size:16px'><thead></thead><tbody><tr><td>Job reference</td><td>KAL-ESR-4471</td></tr><tr><td>Date of visit</td><td>29 January 2026</td></tr><tr><td>Engineer</td><td>R. Tarbert</td></tr><tr><td>Instrument</td><td>Kestrel 400 turbidity analyser</td></tr><tr><td>Location</td><td>Vardenne Quay pumping station</td></tr><tr><td>Service interval</td><td>Twelve months</td></tr></tbody></table>\n<p id='5' data-category='paragraph' style='font-size:20px'>Reported fault</p>\n<br><p id='6' data-category='paragraph' style='font-size:18px'>Intermittent baseline noise on channel 2, reported by the Partnership on 21 January. The analyser had<br>been running without attention since the annual service in January 2025.</p>\n<p id='7' data-category='paragraph' style='font-size:20px'>Work carried out</p>\n<br><p id='8' data-category='paragraph' style='font-size:18px'>The flow cell was removed, stripped and cleaned, and the pump tubing set replaced. The optical window<br>was found to be lightly fouled on the inner face; it was cleaned rather than replaced, and should be<br>inspected again at the next visit. The analyser was recalibrated against the two-point standards and left<br>running on channel 2 for an hour before the site was handed back. The completed worksheet is bound in<br>as page 2 of this report.</p>\n<footer id='9' style='font-size:14px'>KAL-ESR-4471</footer>\n<br><footer id='10' style='font-size:14px'>Page 1 of 3</footer>\n<p id='11' data-category='paragraph' style='font-size:22px'>Kirkhollow Analytical Laboratories Ltd<br>Service worksheet</p>\n<br><p id='12' data-category='paragraph' style='font-size:16px'>FIELD SERVICE</p>\n<table id='13' style='font-size:18px'><thead></thead><tbody><tr><td>Job reference</td><td>KAL-ESR-4471</td></tr><tr><td>Instrument serial</td><td>GK-2214-77</td></tr><tr><td>Engineer</td><td>R. Tarbert</td></tr><tr><td>Date</td><td>29\u00b7January 2026</td></tr></tbody></table>\n<p id='14' data-category='paragraph' style='font-size:16px'>CHECKS AND READINGS</p>\n<br><table id='15' style='font-size:18px'><thead></thead><tbody><tr><td>Flow cell condition on arrival</td><td>Fouled, inner face</td></tr><tr><td>Flow cell pressure after service</td><td>2.4 bar</td></tr><tr><td>Zero drift over 30 minutes</td><td>0.003 mg/l</td></tr><tr><td>Span recovery against standard</td><td>99.4 per cent</td></tr><tr><td>Lamp hours at service</td><td>8,140</td></tr><tr><td>Result</td><td>Pass</td></tr></tbody></table>\n<p id='16' data-category='paragraph' style='font-size:20px'>Calibration certificate SR-4471/2</p>\n<p id='17' data-category='paragraph' style='font-size:18px'>Analyser left in service on channel 2. Optical window to be inspected at the next visit.</p>\n<h1 id='18' style='font-size:16px'>TIME ON SITE</h1>\n<br><table id='19' style='font-size:20px'><thead></thead><tbody><tr><td>Arrived</td><td>29 January 2026, 09:15</td></tr><tr><td>Left</td><td>29 January 2026, 13:40</td></tr><tr><td>Chargeable time</td><td>4 hours 25 minutes</td></tr><tr><td>Next service due</td><td>January 2027</td></tr></tbody></table>\n<h1 id='20' style='font-size:16px'>RECEIVED BY</h1>\n<br><table id='21' style='font-size:20px'><thead></thead><tbody><tr><td>Name</td><td>M. Cairney</td></tr><tr><td>Position</td><td>Duty operator, Vardenne Quay</td></tr><tr><td>Date</td><td>29 January 2026</td></tr></tbody></table>\n<footer id='22' style='font-size:20px'>Engineer's signature</footer>\n<footer id='23' style='font-size:14px'>Service worksheet \u00b7 KAL-ESR-4471</footer>\n<br><footer id='24' style='font-size:18px'>Page2of3</footer>\n<header id='25' style='font-size:16px'>Kirkhollow Analytical Laboratories Ltd</header>\n<br><header id='26' style='font-size:16px'>Job KAL-ESR-4471</header>\n<br><h1 id='27' style='font-size:22px'>Parts fitted</h1>\n<table id='28' style='font-size:18px'><thead><tr><td>Part</td><td>Code</td><td>Quantity</td></tr></thead><tbody><tr><td>Pump tubing set</td><td>PT-114</td><td>1</td></tr><tr><td>Flow cell O-ring, 12 mm</td><td>OR-0912</td><td>2</td></tr><tr><td>Inlet filter, 40 micron</td><td>IF-4004</td><td>1</td></tr></tbody></table>\n<p id='29' data-category='paragraph' style='font-size:22px'>Declaration</p>\n<br><p id='30' data-category='paragraph' style='font-size:20px'>The work described in this report was carried out to the standard set out in the service agreement. The<br>analyser was left in service and calibrated. The next annual service falls due in January 2027.</p>\n<table id='31' style='font-size:18px'><thead></thead><tbody><tr><td>Engineer</td><td>R. Tarbert</td></tr><tr><td>Countersigned</td><td>Dr A. J. Prosser</td></tr><tr><td>Report issued</td><td>2 February 2026</td></tr></tbody></table>\n<footer id='32' style='font-size:14px'>KAL-ESR-4471</footer>\n<br><footer id='33' style='font-size:14px'>Page 3 of 3</footer>",
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        "markdown": "| Job reference | KAL-ESR-4471 |\n| --- | --- |\n| Instrument serial | GK-2214-77 |\n| Engineer | R. Tarbert |\n| Date | 29\u00b7January 2026 |\n",
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        "markdown": "| Flow cell condition on arrival | Fouled, inner face |\n| --- | --- |\n| Flow cell pressure after service | 2.4 bar |\n| Zero drift over 30 minutes | 0.003 mg/l |\n| Span recovery against standard | 99.4 per cent |\n| Lamp hours at service | 8,140 |\n| Result | Pass |\n",
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        "html": "<h1 id='18' style='font-size:16px'>TIME ON SITE</h1>",
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        "html": "<br><table id='19' style='font-size:20px'><thead></thead><tbody><tr><td>Arrived</td><td>29 January 2026, 09:15</td></tr><tr><td>Left</td><td>29 January 2026, 13:40</td></tr><tr><td>Chargeable time</td><td>4 hours 25 minutes</td></tr><tr><td>Next service due</td><td>January 2027</td></tr></tbody></table>",
        "markdown": "| Arrived | 29 January 2026, 09:15 |\n| --- | --- |\n| Left | 29 January 2026, 13:40 |\n| Chargeable time | 4 hours 25 minutes |\n| Next service due | January 2027 |\n",
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      "id": 20,
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        "html": "<h1 id='20' style='font-size:16px'>RECEIVED BY</h1>",
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        "html": "<br><table id='21' style='font-size:20px'><thead></thead><tbody><tr><td>Name</td><td>M. Cairney</td></tr><tr><td>Position</td><td>Duty operator, Vardenne Quay</td></tr><tr><td>Date</td><td>29 January 2026</td></tr></tbody></table>",
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      "id": 22,
      "page": 2,
      "category": "footer",
      "content": {
        "html": "<footer id='22' style='font-size:20px'>Engineer's signature</footer>",
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      "id": 23,
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      "category": "footer",
      "content": {
        "html": "<footer id='23' style='font-size:14px'>Service worksheet \u00b7 KAL-ESR-4471</footer>",
        "markdown": "Service worksheet \u00b7 KAL-ESR-4471",
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        "html": "<table id='28' style='font-size:18px'><thead><tr><td>Part</td><td>Code</td><td>Quantity</td></tr></thead><tbody><tr><td>Pump tubing set</td><td>PT-114</td><td>1</td></tr><tr><td>Flow cell O-ring, 12 mm</td><td>OR-0912</td><td>2</td></tr><tr><td>Inlet filter, 40 micron</td><td>IF-4004</td><td>1</td></tr></tbody></table>",
        "markdown": "| Part | Code | Quantity |\n| --- | --- | --- |\n| Pump tubing set | PT-114 | 1 |\n| Flow cell O-ring, 12 mm | OR-0912 | 2 |\n| Inlet filter, 40 micron | IF-4004 | 1 |\n",
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  ],
  "model": "document-parse-260630",
  "ocr": true,
  "usage": {
    "pages": 3,
    "standard": [1, 2, 3]
  }
}
Open the JSON file ↗
Expected vs. Found
✓Expected: The scanned page's text should appear in the output instead of being skipped.Found: The scanned page is transcribed in place with the digital pages; it is present and not skipped.
Why this result

It is a pass because the image-only page is present in the output like the others: the scanned worksheet is transcribed in place, the service reports all three pages processed with OCR on, and the only differences are a date glyph and missing footer spaces.

Also observed in this test case

Footer spacing changed. The scanned page's footer comes back without spaces, unlike the digital pages' footers.

OCR ran by default. The response reports OCR on, so the default Document Parse flow recognized the scanned page without a special endpoint or flag.

Tested by Chandresh Bisht · evidence dated 9 September 2026

Configuration and setup

How this tool was set up for the run and what the test needed in place. Each row is a fact from the run's records; a fact the records do not hold is left out, not guessed.

Software that produced the output
Upstage AI
Build or version
document-parse-260630 (API 2.0)
Plan or tier
free tier
Model
document-parse-260630
Surface
API
Set up before the run
A mixed PDF was required: two normal digital pages and one scanned image-only worksheet page. The whole PDF was converted in one default pass, with no per-tool tuning or cropped pages.
API version
2.0
OCR
true
Pipeline
default pipeline
Plan
free tier
Tested
9 September 2026 · Chandresh Bisht

How this scenario is graded

How we decide Pass, Fail and Not gradable. The same rules apply to every tool tested on this scenario.

How results are decided

Each test case gets one result per tool: Pass, Fail or Not gradable. A test case we haven't run yet shows Untested. There are no partial results.

The rules
  • Pass: the tool did everything the test expected, and nothing it said contradicts the correct answer.
  • Fail: at least one expected behaviour clearly didn't happen; the test case's result says which one and quotes the tool.
  • Not gradable: our evidence couldn't settle the outcome (for example a record we needed is missing). It is never counted as a fail, and the test case's result says what's missing.

Where this sits in the benchmark

This page is one cell of a larger study: one tool, one scenario. Only this benchmark's frame appears here.

History of this result

What has happened to this result since it was first published. Runs and grades are never overwritten: a retest or a re-grade publishes a new result and keeps the earlier one readable.

from the publication record
11 November 2026First publishedConverting a complex PDF into clean Markdown with a hosted API v1

Act on this result

Nothing filed here edits the run or the grade. A challenge opens a review, and a review can produce a new run or a re-grade — which becomes the current result and leaves this one in the history.

This matches what I see

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Point out an issue

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Vendor notice →
Filed against this evidenceNothing yet. Challenges, counter-evidence and fix notices appear here with their outcome, and stay on the page after they are resolved.
Cite this result
aidemos.com/benchmarks/pdf-to-markdown-apis/results/upstage-ai/a-document-mixing-digital-and-scanned-pages · 1 pass · 0 fail · coverage 1/1 · graded 2026-10-17

The same record is available as structured data through the AI Demos MCP server, with the counts, the coverage and every per-test-case reason carried as fields.

Verify the proof files

These files support this result. Open a file to inspect the original evidence.

Input · Document (PDF) ↗application/pdf · 356 KB
Output file (JSON) ↗application/json · 31 KB
Output file (Markdown) ↗text/markdown · 3 KB
File fingerprints (SHA-256)

A fingerprint identifies the exact file used for this result.

Input · Document (PDF)096951b8eaf09740a926620943c7eb9b076e80144d76e7a90fb7f77056b6ef83
Output file (JSON)2a46c9eff6e3a35e846fb261891b332d8e7c1d5b15d5284040ec7a400d822ca2
Output file (Markdown)8ae1d0b117fb278a4c8f2c59f9a0a2e03ed02113b48d8b338943655423983962