What does the AI API Cost Calculator do?

Estimates your real monthly AI API bill across Claude, GPT-4o, and Gemini at your exact traffic, and recommends the best-value model.

How do I use the AI API Cost Calculator?

1. Set average input and output tokens per request (rule of thumb: 1 token ≈ ¾ of an English word). 2. Set requests per day and pick your use case. 3. Compare the table (sorted cheapest-first), read the recommendation, export CSV if needed.

Is the AI API Cost Calculator free?

Yes — it's completely free and requires no account or sign-up (fair-use limit of 5 runs per tool per day). A free account raises that to 15 runs a day and saves your work.

03Cost Calculator · Free

Know what AI will cost before you build.

Compare Claude, GPT-4o, and Gemini at your exact usage volume. Monthly estimates, per-request pricing, and a Claude-powered recommendation.

Input Tokens / Request

Output Tokens / Request

Requests / Day — 1,000

Use Case

Popular model comparisons

Haiku 4.5 vs Sonnet 5 Haiku 4.5 vs Opus 4.8 Haiku 4.5 vs GPT-4o Haiku 4.5 vs GPT-4o mini Haiku 4.5 vs Gemini 2.5 Pro Haiku 4.5 vs Gemini 2.5 Flash Sonnet 5 vs Opus 4.8 Sonnet 5 vs GPT-4o Sonnet 5 vs GPT-4o mini Sonnet 5 vs Gemini 2.5 Pro Sonnet 5 vs Gemini 2.5 Flash Opus 4.8 vs GPT-4o Opus 4.8 vs GPT-4o mini Opus 4.8 vs Gemini 2.5 Pro Opus 4.8 vs Gemini 2.5 Flash GPT-4o vs GPT-4o mini GPT-4o vs Gemini 2.5 Pro GPT-4o vs Gemini 2.5 Flash GPT-4o mini vs Gemini 2.5 Pro GPT-4o mini vs Gemini 2.5 Flash Gemini 2.5 Pro vs Gemini 2.5 Flash

Build cost-aware agents with automatic provider routing — switch models based on complexity at runtime.

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