What does sending a large PDF to an LLM cost?
Need to estimate the token cost of a large PDF in an LLM? Tokens are the unit AI providers bill in, and getting the count wrong throws off every cost estimate. This page helps teams processing big documents get an accurate count and the cost that follows from it.
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: a large PDF can be tens of thousands of tokens, so it may not fit the window and always costs heavily on input. In practice the biggest savings come from chunking the PDF and processing only relevant sections, so it is worth modelling before you commit.
How it's calculated
We estimate this by converting the PDF's text length to tokens and pricing it at the input rate. 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
Will a big PDF fit in context?+
Often not — check against the window and chunk if needed.
How do I cut the cost?+
Extract and send only the relevant pages, not the whole file.
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.