AI Token Cost Calculator
Estimate your AI API costs before you spend. Compare GPT, Claude, and Gemini pricing in seconds.
$2.5/1M input tokens · $10/1M output tokens · Context: 128,000 tokens
Used to project your monthly cost (assumes 30 days).
Input Cost
$0.0025
Output Cost
$0.0050
Total Cost / Request
$0.0075
Projected Monthly Cost
Based on your requests/day input
$22.50
Compare All Models
Cost for the same 1,000 input / 500 output tokens, cheapest first.
| Model | Provider | Input Cost | Output Cost | Total Cost | Context Window |
|---|---|---|---|---|---|
| Gemini 1.5 FlashCheapest | $0.0001 | $0.0002 | $0.0002 | 1,000,000 | |
| GPT-4o mini | OpenAI | $0.0002 | $0.0003 | $0.0005 | 128,000 |
| Claude Haiku | Anthropic | $0.0008 | $0.0020 | $0.0028 | 200,000 |
| Gemini 1.5 Pro | $0.0013 | $0.0025 | $0.0038 | 1,000,000 | |
| GPT-4o | OpenAI | $0.0025 | $0.0050 | $0.0075 | 128,000 |
| Claude Sonnet | Anthropic | $0.0030 | $0.0075 | $0.0105 | 200,000 |
| Claude Opus | Anthropic | $0.0150 | $0.0375 | $0.0525 | 200,000 |
How It Works
Growfiy's Token Calculator uses tokenizer logic modeled on each provider's official tokenization rules to convert your text into an accurate token count, then applies current published pricing to estimate your API cost.
- Your input text is parsed and split into tokens the same way the selected AI model would process it.
- The tool counts prompt tokens and, if you provide expected output length, estimates completion tokens separately.
- Token counts are multiplied by the model's per-token pricing to show you an estimated cost per request.
- You can switch between models to instantly compare cost and token-efficiency side by side.
How to Use the Token Calculator
- Step 1: Paste or type your prompt into the input box above.
- Step 2: Select the AI model you plan to use — GPT-4, Claude, Gemini, DeepSeek, Llama, or Mistral.
- Step 3: (Optional) Add your expected response length to include completion tokens in the estimate.
- Step 4: View the estimated token count and approximate API cost instantly, updated as you type.
- Step 5: Compare across models to find the most cost-efficient option for your use case.
Frequently Asked Questions
What is an AI token calculator?
An AI token calculator estimates how many tokens a piece of text will consume when sent to a large language model like GPT, Claude, or Gemini. Since most AI providers charge per token, it also converts that count into an approximate API cost.
How are tokens different from words?
A token is not the same as a word. On average, 1 token is roughly 4 characters or about 0.75 words in English. So 100 words usually translate to around 130–140 tokens, though this varies by model and language.
Is Growfiy's token calculator free to use?
Yes, the tool is completely free with no signup required. You can estimate token usage and costs for OpenAI, Claude, Gemini, DeepSeek, Llama, Mistral, and other supported models as often as you like.
Does the calculator give exact token counts?
The calculator provides a close estimate based on each model's tokenizer rules. Actual token counts can vary slightly depending on formatting, special characters, and the specific model version used at the time of your API call.
Which AI models does this calculator support?
It covers major LLM providers including OpenAI (GPT models), Anthropic Claude, Google Gemini, DeepSeek, Meta Llama, and Mistral, so you can compare token usage and cost across providers before choosing one for your project.
Why do I need to estimate token usage before building with an LLM?
Estimating tokens upfront helps you budget API costs, choose the right model for your use case, and avoid surprise bills — especially useful when you're prototyping prompts or scaling an AI feature in production.