What does text cost?

Change this number to the reply length you expect. It is an assumption, not a prediction.

Receipt uses 500 output tokens.

TOKEN RECEIPT2026-09-11
GPT-4.1 nano
input — 0 tok × $0.10/MTok $0.000000
assumed reply — 500 tok × $0.40/MTok $0.000200
GPT-5.4 nano
input — 0 tok × $0.20/MTok $0.000000
assumed reply — 500 tok × $1.25/MTok $0.000625
Claude Haiku 4.5
input ~ 0 tok (est.) × $1.00/MTok $0.000000
assumed reply — 500 tok × $5.00/MTok $0.002500
Claude Sonnet 5
input ~ 0 tok (est.) × $2.00/MTok $0.000000
assumed reply — 500 tok × $10.00/MTok $0.005000
TOTAL for one request to all four$0.008325
input: your text · output: your visible 500-token starting assumption · OpenAI input counts exact (o200k) · Claude input counts est. ±20% · prices: provider list, verified 2026-07-09
How these numbers are made

Tokens are the chunks a model actually reads — about three-quarters of an English word each, so 100 words is roughly 130–140 tokens.

OpenAI rows are exact. Your text is encoded in your browser by the gpt-tokenizer library using o200k_base, the same encoding OpenAI’s models use. Same input, same count, every time.

Claude rows are estimates. Anthropic doesn’t publish its tokenizer, so there’s nothing exact to run. I multiply the o200k count by 1.15 and mark it “est.” — read ±20% into it. Where this site has real Claude numbers — Arena races and Guess reveals — they come from Anthropic’s own usage reports, and those are exact.

The math on every line: input tokens × input rate ÷ 1,000,000, plus assumed output tokens × output rate ÷ 1,000,000. Each line is rounded to six decimals at display — recompute it by hand. Rates per million tokens (MTok), as listed by OpenAI and Anthropic, verified 2026-07-09: GPT-4.1 nano $0.10 in / $0.40 out · GPT-5.4 nano $0.20 in / $1.25 out · Claude Haiku 4.5 $1.00 in / $5.00 out · Claude Sonnet 5 $2.00 in / $10.00 out.

Reply length is your assumption. The field starts at 500 output tokens and stays visible beside the receipt. Change it to zero for an input-only price, or use the reply length you expect. The site does not predict it.

Nothing you type leaves the page — the counting runs in your browser. The headline’s own token boundaries are computed once, when the site is built. Your text is tokenized live, on your device.