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AI Token Counter
Calculate token usage and estimate costs for OpenAI (GPT-4o) and Anthropic (Claude 3.5) models.
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Token Count
0
tokens
Validation (GPT-4o)
tiktoken
Est. Cost (Input)
GPT-4o
$5.00 / 1M tokens
$0.0000
GPT-4o Mini
$0.15 / 1M tokens
$0.0000
Claude 3.5 Sonnet
$3.00 / 1M tokens
$0.0000
Claude 3 Haiku
$0.25 / 1M tokens
$0.0000
Understanding Tokens
Tokens are the basic units of text that LLMs process. A token doesn't always equal a word:
- Roughly: 1,000 tokens ≈ 750 words.
- English: Short words are 1 token, complex words are multiple.
- Cost: API pricing is based on token volume (input + output).
Accurate Calculation
We use the `tiktoken` library (same as OpenAI) with the `o200k_base` encoding (used by
GPT-4o) to ensure precision.