Claude vs Gemini: which is cheaper for long documents?
Trying to decide whether Claude or Gemini is cheaper for long documents? Picking the wrong model can multiply your bill for identical output. This comparison is for teams processing large documents and ranks the realistic options side by side using current prices, so the cheapest choice for your workload is obvious.
Start here: Claude vs Gemini Cost Calculator
Results update automatically as you type.
| Claude Opus 4.8 | Anthropic | $0.0175 | $1,750.00 | 1,000,000 |
| Gemini 2.5 Pro | $0.00625 | $625.00 | 1,048,576 |
Then: PDF Token & Cost Calculator
Results update automatically as you type.
- Estimated input tokens
- 15,000 tokens
- Input cost
- $0.0187
- Output cost
- $0.00500
- Total
- $0.0238
Why this isn't trivial
The part people underestimate: with long documents the input side dwarfs output, so the model with the lower input rate usually wins. In practice the biggest savings come from choosing the low-input-rate model and trimming boilerplate before sending, so it is worth modelling before you commit.
How it's calculated
We estimate this by applying each model's input rate to a large document plus a modest output and comparing totals. Every figure uses the current provider prices baked into the site (reviewed daily), and you can override any input to match your own assumptions.
Frequently asked questions
Does the large context window cost extra?+
You pay per token used, so filling a big window is what costs — not having one.
Which wins for long docs?+
Usually the model with the lowest input token rate; the calculator confirms for your size.
Are these prices up to date?+
Yes. The model prices behind this calculator are refreshed and reviewed daily, so your estimate reflects current provider rates rather than a stale snapshot.
Related
Estimates for planning. Pricing data last reviewed 28 July 2026.