Prompt Cost Simulator
Quick answer
Enter prompt and completion token estimates—see an approximate dollar range.
For a related estimate, see Llm Token Counter.
Explore further: Ai Api Cost Calculator · Llm Context Visualizer
Variance
Actual completions vary in length—run distributions (p50/p95) for real forecasts, not one number.
Explore further: Embedding Cost Calculator · Accessible Color Palette
Single-request cost is input tokens × input rate plus output tokens × output rate. Use it when you are tuning `max_tokens` or choosing between models for a template.
How to use this calculator
- Open the tool: Estimate tokens from the counter tool.
- Tune inputs: Enter expected completion length.
- Read the output: Swap models to see price vs capability tradeoffs.
Real-world examples
- Support bot: Short replies cheapen output—long escalations dominate cost.
- JSON mode: Extra tokens for schema—budget overhead explicitly.
Explore further: Aspect Ratio Calculator
Tips & gotchas
Log token usage per feature—aggregate analytics beats spreadsheet guesses.
FAQ
Streaming costs more?
Billing is still by tokens—streaming changes UX, not the pricing unit.
Does this tool send my text to a server?
Calciverse runs in your browser; we do not store your inputs on our servers for these utilities. Anything that uses network APIs (for example DNS lookup) only sends what you explicitly request.
Why do results differ from another site?
Rounding, defaults, and implementation details (color spaces, tokenizers, DNS resolvers) can differ. Compare definitions, not just the headline number.