Every API call to a large language model is billed by tokens — chunks of text the model reads and generates. Prices vary dramatically: Claude Opus 4.7 charges $5/M input tokens, while Haiku 4.5 charges $1/M. The same prompt can cost 5× more depending on which model you choose.
RealAICost is the honest calculator that shows you exactly what you'll pay. We cover 20+ models across Anthropic, OpenAI, Google, Meta, and DeepSeek — with accurate token counting, prompt caching savings, and batch API discounts built in.
Unlike other calculators, we use real tokenizer counts: tiktoken for OpenAI (client-side, exact), Anthropic's count_tokens API, and Google's countTokens API. No estimates, no guesswork.
Need help optimizing your prompts? Try our sister tool TokenAdvisor — paste your prompt, see where your tokens go, and get specific savings recommendations with dollar amounts at your volume.