AI token & prompt cost calculator

Estimate tokens and input cost for GPT-4o, Claude 3.5 Sonnet and DeepSeek V3 from prompt length. Heuristic only — not a tokenizer API.

0

Estimated tokens

$0.0000

GPT-4o Input ($2.5/1M)

$0.0000

Claude 3.5 Sonnet ($3.0/1M)

$0.0000

DeepSeek V3 ($0.27/1M)

Build a prompt library: store reusable prompts and contexts in the free Windows outliner SEO Note — offline, no subscription. Download free (~2.5 MB).

Related: AI prompts in notes · Token cost of note workflows · Word counter · Download SEO Note