What does GPT Cost Calculator do?

GPT Cost Calculator is a browser-based AI-prompt utility. It analyses, transforms, formats, or costs your prompt entirely client-side — no OpenAI/Anthropic key needed, no data ever sent to a language model.

Does GPT Cost Calculator call a language model or API?

No — GPT Cost Calculator is a static analyser. It uses local heuristics (token counting, quality scoring, format rewriting) so you can iterate on prompts privately without spending API credits or leaking proprietary prompt IP.

Which AI models does GPT Cost Calculator cover?

GPT Cost Calculator covers the current-generation models: OpenAI (GPT-4o, GPT-4o mini, o1, o3), Anthropic (Claude 3.5 Sonnet, Haiku, Opus), Google (Gemini 1.5 Pro, Flash), and popular image models (DALL-E 3, Midjourney, Stable Diffusion, Flux).

How accurate is the token count from GPT Cost Calculator?

GPT Cost Calculator uses a client-side tokeniser calibrated to OpenAI's tiktoken (cl100k_base) and Anthropic's Claude tokeniser. Token counts are within 1-2% of the official API result — accurate enough for cost estimation and context-window planning.

Is my prompt private when I paste it into GPT Cost Calculator?

Yes. All prompt analysis runs in your browser — the text is never uploaded, logged, or shared with a language-model provider. Safe to use with proprietary system prompts and confidential instructions.

Is GPT Cost Calculator free and unlimited?

Yes — no signup, no rate limits, no premium tier. Use it as much as you like on any device.

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GPT Cost Calculator

Calculate exact OpenAI GPT API costs for GPT-4o, GPT-4o mini, o1, and o3. Cost per request and monthly totals — free.

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