💰 AI Token & Cost Estimator (v2.0)
Estimate token usage and costs across 30+ AI models (June 2026). Understand the true cost of your AI usage and compare prices side by side.
Estimate Tokens & Costs
⚡ = Reasoning model (uses hidden thinking tokens that increase cost)
Frequently Asked Questions
How does the token estimator calculate costs?
It counts tokens in your input text using a tokenization approximation, then multiplies by the per-token pricing for each selected AI model. Costs are shown for both input and output tokens separately.
What are reasoning tokens and why do they increase cost?
Reasoning tokens are hidden "thinking" tokens that models like OpenAI o1 and o3 generate internally before producing a response. They are billed like output tokens but are not visible in the response — making costs higher than expected. This tool estimates them based on typical reasoning overhead.
Which AI models are included in the cost comparison?
The estimator covers 20+ models including GPT-4o, GPT-4 Turbo, o1, o3-mini, Claude 3.5 Sonnet, Claude 3 Opus, Gemini 1.5 Pro, Gemini Flash, DeepSeek, Llama, and Mistral variants.
How accurate are the token count estimates?
Estimates are based on a widely-used approximation of ~4 characters per token for English text. For exact counts, use the official tokenizer for your target model. This tool is designed for budgeting and comparison, not byte-level precision.