LLM Token Cost Calculator | Estimate OpenAI and Claude API Bills

LLM token cost calculator estimates API spend per call, day, month and year across OpenAI and Claude models, with prompt caching and batch discounts. Free, no signup. Designed specifically for developers and professionals, this free online calculator runs entirely in your browser to process tasks quickly and securely. Enjoy unlimited usage with no data tracking and no registration required.

Also known as: llm token cost calculator · openai api cost calculator · claude api pricing calculator · llm api cost estimator · prompt caching savings calculator · ai api budget planning

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Model

Prices per million tokens, taken from each vendor's own pricing page on August 15, 2026. Every field is editable, so use Custom for anything not listed or when a price changes.

Input $ per 1M tokens

Output $ per 1M tokens

Cached input $ per 1M

Blank means no cache discount

Usage

Input tokens per call

Output tokens per call

Calls per day

Input cached (%)

Share of input tokens served from cache

Both major vendors discount batch jobs by 50 percent

Cost

Anthropic Claude Sonnet 5

per call

$0.009000

per day

$9.00

per month

$270.00

per year

$3,285

Split per call

input $0.004000 · output $0.005000

Saved per call

cache $0 · batch $0

Monthly figures assume 30 days and yearly 365, at a constant call rate. Token counts are yours to supply: a rough guide is about 4 characters per token for English, but the only accurate number comes from the usage field your API response already returns.

Prices Used

Per million tokens, from each vendor's own page on August 15, 2026.

Model	Input	Cached input	Output
GPT-5.6 Sol OpenAI	$5	$0.5	$30
GPT-5.6 Terra OpenAI	$2	$0.2	$12
GPT-5.6 Luna OpenAI	$0.2	$0.02	$1.2
GPT-5.6 Cyber OpenAI	$12.5	$1.25	$75
Claude Fable 5 Anthropic	$10	$1	$50
Claude Opus 5 Anthropic	$5	$0.5	$25
Claude Sonnet 5 Anthropic	$2	$0.2	$10
Claude Haiku 4.5 Anthropic	$1	$0.1	$5

Vendors change these often, sometimes mid-quarter. Check the pricing page before committing a budget, and use Custom to model a rate that is not listed.

About LLM Token Cost Calculator

Estimate what an LLM feature costs per call, per day, per month and per year, with prompt caching and batch discounts factored in.

Key Features

Preset prices for current OpenAI and Anthropic models, taken from each vendor's own pricing page
Every price field is editable, so you can model a rate that is not listed or one that just changed
Handles prompt caching by share of input tokens, and the 50 percent batch discount both vendors offer
Splits the bill into input and output so you can see which side to optimize
Runs entirely in your browser with no signup and nothing uploaded

Use Cases

Sizing the budget for an LLM feature before you ship it
Comparing what the same workload costs on a flagship model against a cheaper one
Working out whether prompt caching or the batch API saves more for your traffic shape
Explaining to a finance team why output tokens dominate the invoice
Sanity-checking a surprising API bill against expected volume

Related Keywords

llm token cost calculator

openai api cost calculator

claude api pricing calculator

gpt token price calculator

llm api cost estimator

prompt caching savings calculator

batch api discount calculator

ai api budget planning

Privacy & Security

All processing happens locally in your browser. Your data never leaves your computer, ensuring complete privacy and security.

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Frequently asked questions

What is LLM Token Cost Calculator used for?

LLM token cost calculator estimates API spend per call, day, month and year across OpenAI and Claude models, with prompt caching and batch discounts. Free, no signup.

Is LLM Token Cost Calculator free to use?

Yes. LLM Token Cost Calculator is completely free with no usage limits, and there is no paid tier required to use it.

Do I need an account to use LLM Token Cost Calculator?

No. LLM Token Cost Calculator works immediately in your browser with no signup, login, or email address required.

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