Your prompt is analyzed locally in your browser and is never transmitted to any server.
| Model | Est. Tokens | Est. Cost | Context Limit | Status |
|---|
AI models don't process text character by character — they split it into tokens, which are chunks of roughly 3–4 characters or about ¾ of a word. A token might be a whole common word like "the", a word fragment like "un" or "able", or a punctuation mark. This tool estimates token count using the common approximation of 4 characters per token, which is accurate enough for English prose but may vary for code, non-Latin scripts, or heavily punctuated text.
AI providers charge for input tokens separately from output tokens. The costs shown here are input-only — what you pay to send your prompt to the model. Output tokens (the model's response) are typically priced higher and are not estimated here since they depend on the response length. Prices are per million tokens ($/1M), so even a large prompt usually costs a fraction of a cent. Costs reflect publicly listed API prices and may change over time.
Every model has a context window — the maximum number of tokens it can process in a single request, including both your prompt and its response. If your prompt alone consumes most of the context, the model has little room to generate a useful reply. The status column warns you when your prompt is approaching or exceeding a model's limit. Near limit means your prompt is over 80% of the window; Exceeds limit means the model cannot process it at all without truncation.
Estimated at 200 words per minute, a typical silent reading pace. This gives you a rough sense of how long it would take a human to read and absorb the prompt — useful for gauging whether a prompt is too verbose for its purpose.