Show HN: CostPerPrompt – Live AI API pricing and real-workload cost calculators | SpinGraph: Efficiency framing
SpinGraph analysis of Hacker News Front Page's Show HN: CostPerPrompt – Live AI API pricing and real-workload cost calculators story: efficiency framing, The C…
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Show HN: CostPerPrompt – Live AI API pricing and real-workload cost calculators
cost estimation, API pricing, token economics
Tool calculates per-prompt costs across major AI APIs using current rate cards Allows users to model costs for specific input/output token configurations Hosted as an open, interactive web interface with no authentication or backend tracking
Emphasizes calculability and transparency while minimizing variability in real-world usage (e.g., retries, caching effects, model drift), and omits validation against actual billed costs.
Developer-first utility tool enabling informed, efficient resource allocation
CostPerPrompt is a live calculator that estimates AI API costs using official pricing data.
No mention of data freshness lag; No disclosure of whether rate cards include enterprise discounts or volume tiers; No handling of multimodal or streaming API cost structures
Combines the credibility signals of open access, live UI interactivity, and alignment with developer pain points to make cost predictability feel more certain and actionable than it is — the tension lies between the clean interface and the messy reality of production API economics, where the tool offers no validation against actual bills or usage telemetry.
CostPerPrompt provides live AI API pricing and real-workload cost calculations.
Extracted statistics from the source narrative
Pulls from publicly documented API rate cards; no real-time API polling