AI Tools
AI Context Window Calculator
Checks a real document against every major model's context limit at once, instead of guessing and finding out from an error message.
FreeNo sign-upRuns in your browser
How it works
- 1Paste your document or conversation history
- 2Tokens are counted and compared against every model's context window
- 3See remaining headroom per model
Who this is for
- Checking whether a codebase or transcript fits in context
- Deciding whether to chunk a document or use it whole
- Choosing a model based on context headroom, not just price
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