The best AI for long documents & PDFs
Which model to use for long documents & PDFs, why, and how to try it without paying for three separate subscriptions.
Model data updated: 2026-10-04
Top pick: Claude
The largest context window here, so a long report goes in whole instead of being chopped up.
Favoured for long documents, careful reasoning and natural writing, with very large context windows.
- Handles very long documents in one pass
- Natural, low-cliché writing style
- Careful step-by-step reasoning and coding
| Representative model | Provider | Context | Input | Output |
|---|---|---|---|---|
| Claude Opus 5 | Anthropic | 128K | $15 | $75 |
per 1M tokens. Prices are the providers’ list prices in USD per million tokens and can change at any time. Use them for comparison, not billing.
Also good
Gemini
Strong price-to-performance with fast responses and generous free access — the model behind Blend’s free trial.
ChatGPT
The most widely used general-purpose assistant, with the broadest ecosystem of tools and integrations.
Try this question
Summarise this 60-page report into decisions and action items.
In Blend you do not have to choose manually — Auto sends this kind of question to the model above.
Claude models you can use in Blend
| Model | Context | Input | Output | Images |
|---|---|---|---|---|
| Claude Opus 5 | 128K | $15 | $75 | Yes |
| Claude Sonnet 5 | 128K | $3 | $15 | Yes |
| Claude Fable 5 | 128K | $3 | $15 | Yes |
| Claude Haiku 4.5 | 200K | $0.80 | $4 | Yes |
Blend currently exposes 4 Claude models with published pricing or context figures.
Tasks where Claude is the first pick
Frequently asked
The best AI for long documents & PDFs
Claude (Anthropic). The largest context window here, so a long report goes in whole instead of being chopped up. In Blend you do not have to choose manually — Auto sends this kind of question to the model above.
Try this question
Summarise this 60-page report into decisions and action items.
Can I ask Claude and Gemini the same question at once?
Yes. Blend sends one question to both and puts the answers side by side, and a second model can fact-check the first. There is a free daily tier with no signup.
Blend — one question, multiple AIs, better answers
Related comparisons
- The best AI for coding
- The best AI for writing
- The best AI for translation
- The best AI for studying
- ChatGPT vs Claude
- ChatGPT vs Gemini
Model capabilities and prices change often. Figures come from Blend’s automatically synced registry and are shown for comparison. All model prices · Terms · Privacy Policy · Refund