Question 1

How is the cost of a Claude API call calculated?

Accepted Answer

Cost equals (input tokens / 1,000,000 × input price) plus (output tokens / 1,000,000 × output price), using the per-million-token prices for the model you pick. Input and output are priced separately and output is always more expensive.

Question 2

How accurate is the token estimate from pasted text?

Accepted Answer

The paste-to-estimate feature approximates tokens as characters divided by four, which is a rough heuristic. For exact counts, use Anthropic's count_tokens endpoint, since tokenization is model-specific.

Question 3

Can prompt caching reduce the cost?

Accepted Answer

Yes. Cached input tokens are read at roughly one-tenth of the base input price, so repeating a large stable prefix (a system prompt, tools, retrieved documents) across requests can cut input cost dramatically. This calculator estimates uncached pricing.

Question 4

Is the pricing up to date?

Accepted Answer

Prices are shown as-of a dated snapshot and are easy to edit in the tool's source. Always confirm against Anthropic's official pricing page before relying on a figure for billing.

Per call	Tokens	Cost
Input	0	$0.00
Output	0	$0.00
Cost per call		$0.00

Per month	Tokens	Cost
Input	0	$0.00
Output	0	$0.00
Monthly total		$0.00

Claude token & cost calculator

Your workload

Estimated cost

Current Claude model pricing

Claude token & cost calculator

Your workload

Estimated cost

Current Claude model pricing

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