AI Demos Research — the structured-intelligence platform. Every verdict on these pages opens to the execution behind it.
Graded 8 November 2026

Can Extend AI total across documents?

Extend AI returned £7,838.04 instead of the required £9,592.44 when asked to total three invoices. The shortfall equals one invoice’s £1,754.40 contribution.

1 of 1 test case failed

Every test case in this scenario has a result.

Pass rate0%0 of 1 gradable
Coverage1 of 1test case with a result
0PassNo test case passed.
1FailMissed at least one thing it was expected to do; the reason and proof are with each test case below.
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.

Total across every documentFailEvidence
What we sent

In Extend AI, we requested the combined total due for three uploaded invoices, with cross-document processing turned on.

Input 1Document (PDF)
Input PDF: three-page mixed digital and scanned invoice totaling £1,246.80
Open the PDF ↗
Input 2Document (PDF)
Input PDF: two-page invoice with £1,754.40 due on the final page
Open the PDF ↗
Input 3Document (PDF)
Input PDF: two-page invoice with ten line items and a £6,591.24 total
Open the PDF ↗
What the tool returned

The tool's response has no text to quote: it is what the evidence under Proofs shows.

Proof 2 · Screenshot

Proof 1 · Screenshot

Expected vs. Found
✗Expected: The total due across every extracted document: £9,592.44.Found: It returned £7,838.04 rather than £9,592.44, omitting the invoice contributing £1,754.40.
Supporting proof
Proof 1Screenshot
Results screenshot: combined total of £7,838.04 with its citation and OCR confidence
Open original ↗
Proof 2Screenshot
Results screenshot: individual invoice extraction without a combined total
Open original ↗
Why this result

The documented aggregation operation completed with all three invoices loaded. A document’s contribution was left out, so the error was in a supported calculation—not a missing aggregation capability.

Also observed in this test case

Citation and confidence. The combined total carries an OCR confidence of 0.373 and a single citation to one invoice’s £6,591.24 total, not to all three documents.

Separate extraction results. Individual-document extraction returned each invoice’s own values without a combined total.

Tested by Rugved Nichite · evidence dated 5 October 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
Extend AI
Build or version
Not exposed by the hosted product
Surface
Web app
Set up before the run
The three multi-page invoices had to be extracted individually and included in one total-due request. The £9,592.44 reference had to come from the product’s individual extraction results.
Multifile
combined run: on · per-file runs: off
Schema field
Total due all documents (string): Sum of total due across all uploaded documents
Tested
5 October 2026 · Rugved Nichite

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.

LevelNameScope
BenchmarkStructured Document Extraction →19 scenarios · 10 tools
CapabilityQuerying →
ScenarioAggregate across documents →
ToolExtend AI →

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
10 November 2026First publishedStructured Document Extraction v1

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This matches what I see

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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/structured-document-extraction/results/extend-ai/aggregate-across-documents · 0 pass · 1 fail · coverage 1/1 · graded 2026-11-08

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 1 · Document (PDF) ↗application/pdf · 176 KB
Input 2 · Document (PDF) ↗application/pdf · 78 KB
Input 3 · Document (PDF) ↗application/pdf · 82 KB
Proof 1 · Screenshot ↗image/png · 143 KB
Proof 2 · Screenshot ↗image/png · 327 KB
File fingerprints (SHA-256)

A fingerprint identifies the exact file used for this result.

Input 1 · Document (PDF)89fb14d7c0897bbfef47ffa3aa3930ee7eccf62c8a9430710d1906598c9bdfec
Input 2 · Document (PDF)fdcf03ac5ee53b083da58166f17fd41e7c72de79a9f3a3f6b67daa1360ddbca9
Input 3 · Document (PDF)d1f3282702260730267278b1071ee30cf79918fa8489d9411c98d8f6e5209f18
Proof 1 · Screenshot9c2e7962cd51e8b47c4cc7500c60d9f52bd7772f5156e8546c62a8cc07afcde5
Proof 2 · Screenshotd0936d8356c38ff48428be77d1262826c3677e1d6ee1f12193789c67cc7a83fb