AI Cost Calculator

What is AI Cost Calculator?

AI Cost Calculator estimates and compares API usage costs across major LLM providers including OpenAI (GPT-4o, GPT-4 Turbo, GPT-3.5), Anthropic (Claude Opus, Sonnet, Haiku), Google (Gemini Pro, Gemini Flash), and other providers. It calculates costs based on input and output token counts, supports batch pricing, and projects monthly costs based on estimated daily usage patterns.

Engineering managers budgeting AI infrastructure costs, AI product managers evaluating model choices, and startup founders planning AI feature economics. The tool runs entirely in your browser — your data never leaves your device.

How to Use AI Cost Calculator

1. Enter the estimated number of input and output tokens per request
2. Set the expected number of requests per day, week, or month
3. Select the models you want to compare from the provider list
4. Review the cost comparison table showing per-request and monthly totals for each model
5. Adjust parameters to run what-if scenarios and find the most cost-effective option

Common Use Cases

• Comparing the cost of running the same workload across different LLM providers and models
• Estimating monthly API spend for a customer support chatbot based on expected conversation volume
• Budgeting costs for a document processing pipeline that handles thousands of pages daily
• Evaluating whether to use a more expensive model with fewer tokens or a cheaper model with more detailed prompts
• Projecting infrastructure costs for AI feature rollouts to present to stakeholders

Pro Tips

• Output tokens typically cost 2-4x more than input tokens — optimizing your prompts to require shorter responses saves more money than reducing prompt length
• Batch API pricing (available from OpenAI and Anthropic) offers 50 percent discounts for non-real-time workloads — use it for background processing, summarization, and classification tasks
• Caching identical system prompts (Anthropic's prompt caching) can reduce input token costs by 90 percent for applications that use the same system prompt across many requests

Why Use This Tool?

• Privacy-first: All processing happens locally in your browser. No data is transmitted to any server.
• No installation required: Works in any modern browser on desktop or mobile.
• Completely free: No account, no credit card, no usage caps.
• Fast and reliable: Powered by modern Web APIs for near-instant results.

Related Concepts

Learn more about related topics: Token pricing, Batch API, Prompt caching, Context window.

Frequently Asked Questions