A policy researcher has to explain an already-published fifty-page report, distinguish quotations from paraphrases and find which page supports each public claim. Here is a scenario-based comparison using documentation checked on 2026-10-25, not an independently tested vendor ranking. The region, plan, exact model version and price are unspecified unless a first-party document establishes them; unmatched performance claims stay unknown.
Audience: analysts and editorial teams. Evidence checked: 2026-10-25. Editorial status: ready. Comparison scope: named scenario; region, plan and model/version parity require separate confirmation.
Three products, three different document paths
A consumer chat upload, a durable project knowledge base and a developer API file request are not the same experiment. OpenAI describes PDF processing through its API, including both extracted text and page images when a supported vision-capable model is used. Anthropic documents persistent project knowledge, while Gemini Apps has separate file-upload controls. The official pages establish workflows, not an independent measure of which model reads footnotes more accurately. Freeze the original PDF, its edition, and the application surface before comparing answers.
Citation fidelity is the buyer’s real output
Ask every system to produce five claims with the page number, a short supporting extract, and a confidence note that distinguishes source language from its interpretation. Manually compare each extract with the locked report. Penalize invented page locations and quotes even when the summary itself sounds reasonable. A table of true positives, missing support and contradictory summaries is more useful than a single aesthetic score. For scanned diagrams, test whether the chosen input route even preserves the graphic.
How to handle corrections and editions
A revised white paper may have the same title but different pagination. Store its publisher, date, file checksum and a stable source URL. Do not ask an assistant to reconcile an old and new copy unless both versions are provided. In projects, verify which files are active; in an API, capture request IDs and upload purpose. If the system offers references to prior chats rather than source pages, those references must not be treated as evidence for publication.
Selection boundaries
A frequently revised dossier may benefit from a managed project; a repeatable document extraction service needs explicit API requests, schema validation and audit logs. Gemini may be convenient in a Google-centered document process, but availability of a product feature says nothing about account-specific retention or legal review. None of the three sources establishes worldwide plan equality. Select the system whose actual output can be reconstructed from a frozen source file and reviewed by a human.
What an actual buyer pilot should measure
Freeze the relevant source files, release identifiers, evaluation prompts, operator permissions and reviewer identities. Use the same rights-cleared materials for every candidate; separate tasks that cannot be configured equivalently instead of forcing them into a single ranking. Review the resulting artifacts against objective acceptance criteria specific to this decision: source traceability, error handling, rework, permission boundaries and whether a competent human approves the final deliverable. Record rejected attempts as well as successful examples. This is a proposed method, not a claim that these vendors have been tested by this publication.
Costs and unresolved evidence
Do not equate an interactive assistant seat, media credit, billable character, hosted token or self-hosted GPU hour. To estimate actual spending, count accepted results, failed attempts, revision cycles, human review, security operations and export/storage costs. AI 10 must supply dated provider-specific pricing records with tier, unit, currency and region; in their absence, monetary figures and claims of price parity remain unknown. Account-level availability and contract addenda require verification. No universal winner score or fictitious hands-on rating is assigned.
Decision for this scenario
Pilot all three against the same 15 verifiable claims and choose by traceable source location and correction workload; do not buy on a vendor summary benchmark.
The article has documented feature and policy evidence but no independent hands-on performance test. Reconfirm plan, region and terms before publication; editorial ready is not WordPress publication approval.
Sources and Further Reading
Original provider and policy sources are listed here. Source-to-claim identifiers are maintained separately in the editorial CSV rather than inserting numbered references into the main text. Where documents are mutable, the access date describes the verification point only.
- OpenAI — File inputs for the OpenAI API (checked 2026-10-25)
- Anthropic — What are projects? (checked 2026-10-25)
- Google — Upload and analyze files in Gemini Apps (checked 2026-10-25)