AI API Cost Calculator
Estimate costs across OpenAI, Anthropic, Google, and Meta AI models. Compare per-token pricing for GPT-4o, Claude 3.5 Sonnet, Gemini, Llama, and more.
About This Tool
AI API costs can spiral quickly when you move from prototyping to production. What starts as a few dollars in testing can scale to thousands per month once real users hit your application. This calculator helps you estimate costs across the four major AI providers -- OpenAI, Anthropic, Google, and Meta -- before you commit to an architecture.
The pricing landscape for large language models is changing rapidly. OpenAI offers GPT-4o at significantly lower rates than the original GPT-4, while Anthropic positions Claude 3.5 Sonnet as a high-capability model at competitive pricing. Google Gemini provides tiered options from the ultra-fast Flash models to the more capable Pro and Ultra tiers. Meta Llama models are open-weight but still incur hosting costs when accessed through API providers.
Each provider uses a per-token pricing model, but the economics differ significantly. Input tokens (your prompts) are always cheaper than output tokens (the model responses). The ratio varies: OpenAI charges 4x more for output on GPT-4o, while Anthropic charges 5x more for Claude 3.5 Sonnet output. These differences compound at scale. A chatbot generating 500-token responses to 100-token prompts has very different cost characteristics than a summarization pipeline processing 10,000-token documents.
This calculator lets you model your specific use case. Enter the average number of input and output tokens per request, your expected daily request volume, and the number of operating days per month. The tool instantly calculates cost per request, daily cost, monthly cost, and projected annual cost across all models. The comparison table highlights the cheapest option so you can make informed infrastructure decisions.
All pricing data reflects publicly listed rates as of early 2025. Actual costs may vary based on committed-use discounts, regional pricing, or API-specific surcharges. The calculator runs entirely in your browser -- no API calls are made, and no data is transmitted.
How to Use
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1
Select a provider
Choose from OpenAI, Anthropic, Google, or Meta using the tabs at the top of the calculator.
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2
Choose a model and enter token counts
Select the specific model, then enter your average input tokens and output tokens per request.
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Set your usage volume
Enter the number of requests per day and operating days per month. Results update instantly.
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Compare across models
Scroll down to the comparison table to see costs for all models side by side. The cheapest option is highlighted.
Where Does This Data Come From?
Pricing data is sourced from official API documentation for OpenAI, Anthropic, Google Cloud, and Meta (via third-party hosting providers) as of early 2025. Token pricing is listed per 1 million tokens. All calculations are performed client-side in JavaScript using straightforward arithmetic: (tokens / 1,000,000) * price_per_million * requests * days. No rounding is applied until display. The "cheapest option" highlight compares monthly costs across all listed models using identical input parameters.
