Free AI Token & API Cost Calculator: Estimate Prompt Costs
Estimate token counts, context window sizes, and API inference costs across major model tiers in real time.
Custom Model Rates ($ per 1M tokens)
Projected Inference Costs
| Model Tier | Rate (In / Out) | Single Call | Batch Cost |
|---|---|---|---|
| Frontier ReasoningDeep planning & complex logic | $3.00 / $12.00 | $0.0060 | $6.00 |
| Flagship BalancedGeneral coding & synthesis | $2.50 / $10.00 | $0.0050 | $5.00 |
| High-Speed FlashRapid search & tools | $0.15 / $0.60 | $0.0003 | $0.30 |
| Ultra-Low NanoClassification & summaries | $0.05 / $0.20 | $0.0001 | $0.10 |
| Custom PricingYour specific provider rate | $2.50 / $10.00 | $0.0050 | $5.00 |
💡 How to cut your API & prompt expenses
- Extract clean text before prompting: Don't feed raw HTML (20k–80k tokens) into your model. Use our Developer Tools or Web to Markdown API to strip script tags and noise.
- Connect lightweight tools via Model Context Protocol: Give your assistant read-only web search and DNS tools using our MCP Config Generator instead of massive bloated context prompts.
- Need structured prompt templates? Check out Stop Typing, Start Asking ($9.99 prompt playbook) for 60+ token-optimized developer prompts.
- Want saved budget presets? Unlock Avalon Pro (from $3.99/wk) to store your custom models and volume forecasts.
Budget summary copied to clipboard!
Todo lo que ya haces aquí sigue siendo gratis.
Qué hace esta herramienta
Paste your prompt instructions, user queries, code snippet, or payload to instantly calculate token volume, context utilization, and projected API costs across common model tiers.
- Instant Token & Character Metrics: Measures character count, word count, estimated input tokens, and estimated output tokens.
- Side-by-Side Model Tier Comparison: Compares Frontier Reasoning, Flagship Balanced, and Fast Flash tiers side by side with customizable request counts.
- Batch Cost Projection: Calculates expenses for 1 request, 1,000 requests, and custom batch volumes.
- Zero-upload privacy: Runs entirely in your browser memory without server uploads.
Cómo usarla
- Paste your prompt, document, or code into the input area.
- Adjust expected output tokens and request batch count.
- Review estimated token size and projected costs across tiers, or choose Custom Rates to match your exact provider invoice.
- Click Copy summary to save your budget breakdown.
Gratis, Pro y Pro+
| Gratis | Pro | Pro+ | |
|---|---|---|---|
| Saved presets (expected output, batch volume, custom model rates) | — | Sí | Sí |
| Calidad del resultado | La misma en todos los planes | ||
| Herramientas de servidor pagadas con créditos | Con un paquete de créditos | Con un paquete de créditos | 300 créditos cada mes |
Los créditos Pro+ sirven para pagar las herramientas de servidor: voz a texto de mayor precisión, subtítulos automáticos de mayor precisión, voces rápidas de servidor y resúmenes, respuestas y traducción de PDF con IA. Un paquete de créditos (150 créditos, válido durante 12 meses) funciona con cualquier plan. Comparar planes.
Úsalo en tu flujo de trabajo
- Stop Typing, Start Asking ($9.99 Prompt Playbook)60+ battle-tested prompt templates to cut prompt tokens in half and avoid costly reasoning loops.
Preguntas frecuentes
How are tokens counted in this calculator?
Standard language processing models estimate tokens at roughly 4 characters per token for English text and code, or 1 to 2 characters per token for non-Latin scripts. This calculator computes word count, character count, and estimated tokens in real time right in your browser.
Can I enter custom input and output pricing?
Yes. Switch the model selector to Custom Rates to type your exact provider pricing per million input and output tokens.
How does batch calculation work?
Enter the number of requests you expect to run per day or per month. The table automatically projects your single-call cost, 1,000-call cost, and full batch expense so you can budget before launching automation.
Is my text or code sent to an external server?
No. Everything runs 100% locally in your browser memory. Nothing you paste or type is stored or transmitted.