US$20 a month for PDFs, editable documents and occasional coding: ChatGPT or Claude?
ChatGPT Plus and Claude Pro each cost US$20 with monthly billing, so either can enter the shortlist. Neither gives unlimited usage or includes a separate API bill. Claude documents Word creation and Docs exports directly; ChatGPT documents file creation and revision too, but this review did not establish a specific DOCX export or the visual-processing limits of ordinary chat. That is a difference in evidence, not an output-quality ranking.
Latest source row read 2026-11-02
The task
Spend at most US$20 in a month without annual prepayment, analyse PDFs, produce documents that can still be edited, and occasionally change code, while keeping desktop, terminal and API bills clear. The budget covers one of these US$20 subscriptions, not both.
Candidates
Meets the documented conditions is not the same as a completed task: it means the conditions listed in the official pages are satisfied, and the limits below still apply.
ChatGPT Plus
Unconfirmed; not recommended yetThis month: US$20/month: the price condition is met. Not a claim about the cheapest paid tier in every region.
Work on the web documents creating and downloading files and requesting a revised version; the desktop app previews files and supports focused revision requests. Codex reaches the CLI, IDE and web. A particular ordinary-chat DOCX export is not established, so confirm the surface if DOCX is mandatory.
- Ordinary document uploads are capped at 512 MB and 2 million tokens per file. Enterprise PDFs support visual retrieval; other plans extract digital text rather than embedded images. Your actual PDF, including scans and charts, has not been tested here.
- Work and Codex share their own allowance and may have weekly limits; do not read that as a universal daily limit for ordinary chat.
- Extra credits and API use add cost beyond the subscription.
Claude Pro
Unconfirmed; not recommended yetThis month: US$20/month: the price condition is met. The US$200 annual payment is upfront; its roughly US$17 monthly equivalent does not satisfy this billing condition.
File creation supports DOCX. Claude Docs supports continued editing and Word, Markdown, PDF or Google Docs exports on Free, Pro, Max, Team and Enterprise, subject to organization controls and plan usage. Pro also includes Claude Code across terminal, IDE, desktop and browser sessions.
- PDF handling depends on length: the upload guide distinguishes text and visual processing up to 100 pages from text-only processing at 101-1000 pages, and longer files cannot use that path. Size and context limits still apply.
- Pro and Max share Claude and Claude Code usage, with five-hour session and weekly limits; document creation consumes allowance too.
- Claude Code’s security guidance says users are responsible for reviewing proposed code and commands for safety before approval.
How to choose
Check Claude Pro first if a documented Word and Docs workflow is the priority. Check ChatGPT Plus if you want the file workflow alongside Codex, and decide first whether the task runs in ordinary Chat, Work or Codex, because each surface has its own file and allowance rules. Neither route guarantees correct content, citations or code.
Subscription is not API
Both consumer subscriptions exclude separately billed API use, so the US$20 does not cover an API bill. Claude annual pricing, ChatGPT Work limits and local terminal execution also do not establish free API access, and local execution is not proof that code never leaves the device.
Before paying
Record the size, page count and whether a representative PDF depends on charts or scans. Decide whether the deliverable is DOCX, Markdown or another editable format, then check your account surface and remaining allowance. If the budget is strict, do not enable metered extras; wait for the allowance to reset instead. We have not run that upload, export or code regression ourselves.
Where every claim comes from
Each link was opened and read on the date shown. The note describes what that page actually supports.
- OpenAI - what is ChatGPT Plus ↗
Plus price and the statement that API use is billed separately.
- ChatGPT Work - pricing ↗
Work and Codex pricing and included surfaces; applies to that scope, not to ordinary chat limits.
- ChatGPT — work with files ↗
Work on the web can create and download files and request a new version; the desktop app previews files and supports focused revision requests.
- ChatGPT - file workflows and desktop app ↗
Desktop app documentation describes creating and inspecting files and working documents; this page does not establish generic DOCX export.
- Claude - pricing ↗
Pro is listed at $20 billed monthly, with a separate annual payment. Claude Code is included from Pro and is not included on Free.
- Claude - why the API bills separately ↗
Claude subscriptions and Console are separate products. API usage is billed separately; Max and Team include monthly API credits. Console access must be set up separately.
- Claude - upload files ↗
PDF page thresholds for text and visual processing.
- Claude - create and edit files ↗
DOCX creation and the file types it produces.
- Claude — Claude Docs ↗
Claude Docs supports continued editing and Word (.docx), PDF, Markdown and Google Docs exports on Free, Pro, Max, Team and Enterprise. Enterprise defaults on from 2026-10-15, subject to owner controls. Docs consumes plan usage.
- Claude — Code on individual plans ↗
Pro and Max share Claude and Claude Code usage, with five-hour session and weekly limits; verified Ultra accounts have no five-hour session limit.
- Claude Code - surfaces and costs ↗
For Teams and Enterprise, Claude Code and chat share a per-seat allowance with five-hour and weekly windows; personal Pro terms are supported by a separate help page.
- Claude Code — supported entry points ↗
Claude Code is available in the terminal, IDE extensions, desktop app and browser. The desktop app requires a paid subscription; subscription or Console authentication depends on the surface. This is documented access, not a completed coding test.
- OpenAI — document uploads and PDF retrieval / 文档上传与PDF检索 ↗
Ordinary document uploads are capped at512MB and2million tokens perfile. Enterprise PDFs support visual retrieval; other plans use digital-text retrieval rather than embedded images. Plan,settings,region,client and model qualify availability.
- Claude Code — security and user responsibility / 安全与用户责任 ↗
The security documentation assigns users responsibility for reviewing proposed code and commands for safety before approval. Permission modes differ; this is guidance, not an executed review.