Free tool
LLM cost calculator
Estimate your monthly LLM bill and compare it across models. Enter your per-request token usage and volume — everything runs in your browser.
Estimated monthly cost
$0
Same workload, every model
Sorted cheapest first — your potential savings from switching.
| Model | Monthly cost | vs. selected |
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Anthropic figures verified June 4, 2026; others June 2026. Prices change frequently. Always confirm against the provider’s official pricing page before relying on these figures for budgeting.
Frequently asked questions
How is LLM API cost calculated?
LLM cost is charged per token: (input tokens × input price) + (output tokens × output price), priced per million tokens. Multiply by your monthly request volume to estimate the monthly bill. This calculator does that across models so you can compare.
Why is output so much more expensive than input?
Providers price output tokens 3–5x higher than input because generation is more compute-intensive than reading the prompt. That makes output length — and reasoning tokens, which bill as output — a major cost driver worth optimizing.
How do I actually reduce these costs?
Right-size the model per route, cache stable prompt prefixes, batch non-urgent work, and add fallback chains — all behind evals so quality holds. Most teams cut 30–60% this way. We do this as a fixed engagement.