Cost Estimator
AI Prompt Cost Calculator
Paste your prompt to estimate AI API costs and compare pricing across 8 models including GPT-4o, Claude, and Gemini. See per-run, per-100, and per-1,000 cost breakdowns instantly. Tokens are approximated using a characters/4 heuristic with output estimated at 2x input.
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Save and version your prompts
Track how prompt changes affect your costs over time. PromptingBox versions every edit so you can compare iterations.
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