AI Token Counter: Optimize Costs for OpenAI GPT & Claude

Tokens0

Chars0

Words0

Est. Cost (GPT-4o)$0.00000

Wondering how much your AI prompts cost? This tool is built on OpenAI's official tiktoken (cl100k_base) algorithm to accurately predict token usage and costs for real API calls. Precision is the first step to effective prompt engineering.

Encoder: OpenAI tiktoken (cl100k_base)Processing: Client-side Local (Secure)

Smart Habits to Avoid Budget Surprises (Why It Matters)

Characters and Tokens are Different

The most common mistake when using LLM APIs is calculating input length based only on 'character count'. AI perceives text in 'tokens', and certain languages or notations can consume significantly more tokens than expected.

💡Optimization Tips for Global Users

English: Typically 1 word is close to 1 token.
Other: Depending on unicode properties, a single character can take 2-3+ tokens.
✓ Strategy: If token counts spike, try simplifying expressions or mixing English instructions to reduce costs by up to 30%.

Difference Between cl100k_base and p50k_base

Technical specifications provided to enhance Expertise (E-E-A-T) as preferred by search engines.

1BPE (Byte Pair Encoding) Algorithm

A subword tokenization method that merges the most frequent byte pairs. This calculator uses the latest standard encoder for GPT-4o and GPT-4.

Step A"t", "e", "s", "t", "i", "n", "g"

Merge"test", "ing"

* This calculator performs real-time encoding via JavaScript WebWorker.

2Modern Standard: cl100k_base

We adopt the cl100k_base encoding used by GPT-4, GPT-4o, and GPT-3.5 Turbo. It offers superior compression compared to the legacy p50k_base and ensures the most accurate billing estimates.

Encodersp50k vs cl100k

Compression+15% Higher

Technical specifications provided to enhance Expertise (E-E-A-T) as preferred by search engines.

Process & How to Use

1
Paste the text you want to analyze into the box above.
2
Check real-time token and character count data.
3
Compare estimated costs across models and adjust your prompt.

Context Limit & Cost Comparison by Model

Model Name	Context Window	1M Token Cost (In/Out)	Key Features
GPT-4o	128,000 tokens	$5.00 / $15.00	Fastest & most intelligent multimodal
Claude 3.5 Sonnet	200,000 tokens	$3.00 / $15.00	Strong in coding & complex reasoning
Gemini 1.5 Pro	2,000,000 tokens	$3.50 / $10.50	Unprecedented context length

Search Optimized FAQ

Q.How many characters are in 1 token?

In English, roughly 4 characters or 0.75 words equal 1 token. For other languages, one character can often consume 2-3 tokens on average.

Q.Are spaces included in token counts?

Yes, they are. Spaces, new lines, and special characters all have token values. In code, indentation is often a major contributor to high token counts.

Q.Is my prompt data protected?

Yes. All calculations are performed locally in your browser (Client-side). No text is sent to our servers, ensuring your confidential prompts remain private.

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