AI Calculators Calculators
LLM token counts and API cost estimators.
ChatGPT Token & Cost Estimator (paste text)
Paste text to estimate its token count and the API cost on GPT models. A quick heuristic, not an exact tokenizer.
Open →OpenAI API Cost Calculator (monthly projection)
Project your monthly and annual OpenAI API spend from request volume and average token sizes.
Open →Claude API Cost Calculator
Estimate Anthropic Claude API cost from input and output tokens, with prompt-caching and batch discounts.
Open →Gemini Token & Cost Estimator
Paste text to estimate tokens and the API cost on Google Gemini models. A quick heuristic, not an exact tokenizer.
Open →LLM Context Window Usage Calculator
See how much of a model’s context window your prompt uses and how many tokens remain.
Open →