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OpenAI vs Claude API Pricing Calculator

Compare estimated OpenAI and Claude API token charges using editable model rates and the same monthly workload.

Quick math0

Use this for quick arithmetic, percentages, or to check figures while filling in the main tool, without leaving the page.

Estimate

Lower estimated monthly cost: Same cost

OpenAI estimated monthly cost: $4.50 USD
Claude estimated monthly cost: $4.50 USD
Monthly difference: $0.00 USD
Annualized difference: $0.00 USD

How this breaks down

Input tokens per month: 1,000,000
Output tokens per month: 250,000
OpenAI rates (input / output per 1M): $2.00 USD / $10.00 USD
Claude rates (input / output per 1M): $2.00 USD / $10.00 USD

The default rate fields are examples for a standard model tier and are editable. Check the linked official pricing pages for your chosen models. This compares token charges only; it does not compare model quality or include caching and tools.

How to use this tool

Use OpenAI vs Claude API Pricing Calculator for the question described above, and check that the inputs match your records and time period.
Enter monthly input tokens.
Enter monthly output tokens.
Enter openai input price per 1m tokens (usd).
Enter openai output price per 1m tokens (usd).
Enter claude input price per 1m tokens (usd).
Enter claude output price per 1m tokens (usd).
Change monthly input tokens, monthly output tokens, openai input price per 1m tokens (usd), openai output price per 1m tokens (usd), claude input price per 1m tokens (usd), claude output price per 1m tokens (usd) to compare scenarios, then check the units in the result.

Worked example with the prefilled values

This example shows how OpenAI vs Claude API Pricing Calculator uses its starting values. Change the calculator inputs to estimate your own situation.

Monthly input tokens: 1000000 tokens/month
Monthly output tokens: 250000 tokens/month
OpenAI input price per 1M tokens (USD): 2 USD/1M tokens
OpenAI output price per 1M tokens (USD): 10 USD/1M tokens
Claude input price per 1M tokens (USD): 2 USD/1M tokens
Claude output price per 1M tokens (USD): 10 USD/1M tokens

Lower estimated monthly cost: Same cost

OpenAI estimated monthly cost$4.50 USD
Claude estimated monthly cost$4.50 USD
Monthly difference$0.00 USD
Annualized difference$0.00 USD

Formula and calculation logic

Provider estimate = input tokens ÷ 1,000,000 × input rate + output tokens ÷ 1,000,000 × output rate

Monthly difference = absolute value(OpenAI estimate − Claude estimate)

Annualized difference = monthly difference × 12

Compare estimated OpenAI and Claude API token charges using editable model rates and the same monthly workload.

The same monthly input and output token volumes are priced separately with the OpenAI and Claude rates you enter, then compared. The default rates are examples, not live prices.

Assumptions

Editable rate fields are provided because pricing changes and differs by model. This compares token charges only; quality, tokenization, caching, tools, long context, and other billed features are not modeled.

Published sources

Further reading for checking current rules and information. These links are not live inputs to the tool.

Questions about this tool

Are OpenAI and Claude prices updated automatically?

No. The price fields are editable; check the linked provider pricing pages and enter the rates for the specific models you want to compare.

Does it compare model quality?

No. It compares estimated token charges only, not quality, speed, context limits, or features.

Are cache and tool charges included?

No. The comparison uses standard input and output token rates only.

Why might actual cost differ?

Tokenization, caching, tool calls, long context, batch processing, and model-specific rules can change billed usage.

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