AI Cost Calculator

Free Calculator

AI API Cost Calculator

Estimate your monthly AI API costs for ChatGPT, Claude, Gemini & more. Enter usage metrics and get an instant cost breakdown.

AI Model GPT-4o ($2.50 / $10.00) GPT-4o Mini ($0.15 / $0.60) o1 ($15.00 / $60.00) Claude Opus ($3.00 / $15.00) Claude Sonnet ($3.00 / $15.00) Claude Haiku ($0.25 / $1.25) Gemini 2.5 Pro ($1.25 / $5.00) Gemini Flash ($0.075 / $0.30) Llama 3.3 ($0.10 / $0.10)

Requests per Day

Avg. Input Tokens / Request

Avg. Output Tokens / Request

Cost Estimate

Daily Input Cost$0.00

Daily Output Cost$0.00

Daily Total$0.00

Weekly Total$0.00

Monthly Total (30 days)$0.00

Yearly Projection$0.00

Savings Tip: Switch to GPT-4o Mini to save approximately $0/month with similar quality for most tasks.

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How to Calculate AI API Costs

AI API pricing is based on tokens processed — both input and output. Each model has different per-token rates. For example, 1 million input tokens costs $2.50 with GPT-4o but only $0.15 with GPT-4o Mini. Our calculator estimates real-world monthly costs based on your actual usage.

Tips to Reduce AI API Costs

Start with cheaper models for simple tasks. Implement prompt caching. Use streaming responses. Batch non-urgent requests. Consider fine-tuning a smaller model for repetitive tasks — the upfront cost often pays for itself within weeks.

Frequently Asked Questions

How is AI API cost calculated?+

Cost = (tokens / 1,000,000) × price per million tokens. Input and output tokens are priced separately.

Which AI model is cheapest to use?+

Llama 3.3 at $0.10/M for both input and output. Among proprietary models, Gemini Flash at $0.075/M input is cheapest.

Is this calculator free?+

Yes, 100% free with no limits. All calculations happen in your browser.