AI Utilities

AI Prompt Token Estimator & Chunker

Estimate prompt token usage across GPT-4o, Claude 3.5, and Gemini models with chunk size recommendations.

Estimated Tokens

Words

Characters

$0.000

Est. Cost (GPT-4o)

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Calculates token length using byte-pair heuristic algorithms calibrated against OpenAI and Anthropic tokenizers.

Prevents exceeding context limits and helps budget API expenditure before running LLM calls.

Yes, estimation runs completely in client-side JavaScript.