Estimate and compare what an AI feature will cost across 80 models. Paste your prompt, see every bill side by side — from prices re-checked every morning.
PromptSpend — LLM API cost calculator for GPT, Claude and 80 models PromptSpend is an interactive calculator and needs JavaScript. The underlying pricing data is a plain JSON file you can read directly at data/pricing.json .
Estimate and compare what an AI feature will cost across 80 models. Paste your prompt, see every bill side by side — from prices re-checked every morning.
PromptSpend — LLM API cost calculator for GPT, Claude and 80 models PromptSpend is an interactive calculator and needs JavaScript. The underlying pricing data is a plain JSON file you can read directly at data/pricing.json .
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