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PDFs, transcripts, articles, books — which AI compresses 30,000 words without dropping the point.
No credit card · run the same prompt across all 4 models in one window
Summarisation looks easy until you stress-test it on a 200-page document. Then context window, attention, and faithfulness to the source all matter — and the gap between the four models widens fast.
If you summarise often, run the same input through two models in MultipleChat. The differences are sometimes dramatic.
Claude's 200k-token window is enough for almost any single document, and its attention quality across that window is the highest of the four — it doesn't 'lose the middle' the way other models can. For one-shot summaries that need to be defensible, it wins.
Try this prompt
Strength
Best long-context attention; least likely to invent.
Weakness
200k token limit (still huge).
When to use
Reports, transcripts, long PDFs.
Strength
2M-token context — paste an entire book. Strong on multi-doc summaries.
Weakness
Slightly less polished prose in the output.
When to use
Massive documents, multi-source summarisation.
Strength
Reliable, fast, integrated file upload.
Weakness
Smaller context than Claude or Gemini.
When to use
Articles, short PDFs, regular workflows.
Strength
Punchy summaries with an opinion.
Weakness
Smaller window; sometimes too compressed.
When to use
Quick takes on shorter pieces.
Does the summary stick to what the source said?
How much can you paste in one go?
Does it weight the start/end fairly, not just the start?
Will it actually follow a structured format you ask for?
Claude (200k window) for most docs; Gemini if it's a really long one. Both let you upload files directly.
Claude — least likely to miss a quiet but important moment in the transcript.
Sometimes. Ask for 'anything material' and 'what's missing', not just a summary, to compensate.
Use it as a draft. Verify against the source. Never cite an AI summary as the document itself.
MultipleChat lets you run the same prompt across ChatGPT, Claude, Gemini and Grok side-by-side. Verify the ranking on your actual work, not someone else's benchmark.
Try MultipleChat FreeAlso see: Which AI should I use? (quiz) · Best AI for other tasks · AI for your profession
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Multi-model AIRun the same prompt through ChatGPT, Claude, Gemini and Grok before trusting one answer.
GuideChoose the best model for writing, research, coding, documents, images and business work.
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PlatformA professional workspace for using several AI models, comparing answers and creating deliverables.
Core conceptUse several frontier models together for stronger answers and fewer blind spots.
ComparisonCompare several AI answers side by side when the output matters.
WorkflowBuild a professional AI stack for documents, research, writing, images and automation.
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