Compare AI Models
Ask one question and see how every top AI model answers your PDF — side by side.
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One AI model isn't always right — and they don't always agree. PDF.chat lets you ask one question about your document and see how every leading AI model answers it, side by side.
Your question runs through Claude, GPT, Gemini, Llama and DeepSeek together — all for one price — so you can see where they agree, where they differ, and pick the answer you trust. Every answer cites its source page.
How to compare ai models
Common uses
- Double-check a high-stakes answer across multiple models before relying on it
- See which model best understands a tricky clause or figure
- Settle a disagreement by comparing how each AI reads the document
- Find the strongest answer to a hard question without paying for five subscriptions
Frequently asked questions
Use this via the API
Run this tool programmatically with a single POST. Authenticate with the API token from your account page.
curl -X POST https://pdf.chat/api/v1/ocr/ \
-H "Authorization: Bearer YOUR_API_TOKEN" \
-F "file=@your-file.pdf" \
-F "tool=compare-ai-models"Files of 5 pages or fewer return the result inline; otherwise poll the job, then download it as md:
curl -L "https://pdf.chat/api/v1/ocr/JOB_UUID/download/?format=md" \
-H "Authorization: Bearer YOUR_API_TOKEN" -o result.mdThen ask questions about the document, with answers cited to the page:
curl -X POST https://pdf.chat/api/v1/chat/JOB_UUID/ \
-H "Authorization: Bearer YOUR_API_TOKEN" \
-H "Content-Type: application/json" \
-d '{"message": "Summarize this document"}'