PromptCost.org
Real-time AI Token Estimation & Global Model Cost Comparison
AI Cost Calculator
Token calculation: ~4 characters per token (English text average)
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Frequently Asked Questions
How much does GPT-4o cost per 1M tokens?
GPT-4o costs approximately $2.50 per million input tokens and $10.00 per million output tokens as of April 2026. Prices vary by provider - check our live calculator for the latest rates from multiple sources.
How is token count calculated?
Tokens are calculated by dividing text character count by approximately 4 (since 1 token ≈ 4 characters in English). For most LLMs, 1,000 tokens equal about 750 words. Our calculator uses this standard approximation.
What is the cheapest AI model?
The cheapest AI models as of April 2026 include DeepSeek V3 at $0.01/M tokens and various open-source models under $0.50/M tokens. Use our live comparison tool to explore all options.
Can I share my calculation results?
Yes! Your prompt text and selected model are automatically saved in the URL. You can share the URL with colleagues or bookmark it for future reference. Just copy the browser URL after making your calculation.