AI token calculator.
Convert tokens to cost in seconds. Enter your input and output volume, compare GPT-4o, Claude, Gemini and 12+ models side by side, and see exactly what every 100K tokens costs, and what that looks like financed with Payle.
3 steps to your token bill.
Enter your token volume, pick the models to compare, and see the exact cost, per request and per month.
Free · no sign-up · your numbers never leave the browser
How to use the AI token calculator
- 1
Enter your token volume
Type the input tokens (your prompt) and output tokens (the reply) you expect, or tap a preset like 10K or 100K. The estimate updates live.
- 2
Pick the models to compare
Select any combination of OpenAI, Anthropic, Google and open models. The cheapest option for your exact mix is highlighted automatically.
- 3
Read the monthly picture
See what the volume costs once, per 1M tokens, and extrapolated to a typical month at 30 requests per day.
- 4
Finance heavy usage with Payle
If your API bill is significant, see the With Payle line: $0 today, then 3 equal monthly installments at 0% APR.
Why token pricing matters
Every AI model bills per token, the smallest unit of text it reads and writes. Because output tokens cost 3-5x more than input tokens, two teams using the “same” model can have wildly different bills: one that streams long answers pays much more than one that asks short questions.
Compare 12+ models from OpenAI, Anthropic, Google, DeepSeek, Mistral and Meta
Token math also explains why model choice matters more than raw usage. A coding assistant running Claude Sonnet costs roughly the same per month as one running GPT-4o, but switching high-volume batch jobs to a cheaper tier like Gemini Flash or an open model can cut the bill by 80-90%.
Cheapest model highlighted for your exact input/output mix
Use this calculator before committing to a model or an API plan, estimate your real mix, compare providers, and budget accurately. When your volume grows, Payle lets you spread the monthly bill over 3 interest-free installments instead of paying it all upfront.
Monthly estimate + $0-today financing with Payle
Built by Payle, explore the AI Store, compare pricing plans, or see how Pay Later works.
More free AI tools
Every calculator is free and needs no sign-up: price, compare, track and optimize your whole AI stack with the same catalog and the same math.
Frequently asked questions
One million input tokens costs between $0.20 (Llama 4 Maverick) and $15 (Claude Opus 4), and output tokens cost 2-5x more per million. GPT-4o is $2.50/M input and $10/M output; Gemini 2.5 Flash is $0.30/M input. The token calculator prices any input/output mix across 12 models in one view.
Enter the number of input and output tokens you expect to use, pick the models you want to compare, and the calculator instantly shows the cost in USD for every model, per request, per 100K tokens, or extrapolated to a monthly volume. It is free and requires no sign-up.
It depends on the model and the input/output mix. For example, 100K input tokens cost about $0.25 on GPT-4o, $0.30 on Claude Sonnet 4, and $0.03 on Gemini 2.5 Flash. Output tokens cost roughly 3-5x more per token than input tokens on most models.
A token is the smallest unit of text a model reads or writes. One token is roughly 0.75 words in English, so 100K tokens is about 75,000 words, the length of a short book. Providers bill per token, both for the prompt you send (input) and the text the model generates (output).
Generating text requires the model to run its full forward pass once per output token, while input tokens are mostly processed in parallel. That is why output prices are typically 3-5x higher than input prices on the same model.
Payle is building financing for AI spend, including usage-based costs. With an annual Payle plan you pay $0 today and spread the estimated monthly API cost over 3 equal installments at 0% APR, so heavy token usage does not require a large upfront budget.
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