OpenAI Pricing Calculator Alternative — Compare Every Provider in One Workload
OpenAI's pricing page is a great reference — for OpenAI models. The moment you want to compare GPT-5 against Claude Opus 4.7 or Gemini 2.5 Pro at the same workload, you have to copy numbers across three browser tabs and do arithmetic in your head. freeaicostcalculator.app is a free multi-provider alternative — type your workload once, see per-model monthly cost across OpenAI (via OpenRouter), Anthropic, Google, xAI, Mistral, DeepSeek, Groq, Cohere and the entire OpenRouter live catalog of 370+ more, all in one sorted bar chart.
What freeaicostcalculator.app does that OpenAI's pricing page doesn't
| Feature | freeaicostcalculator.app | OpenAI pricing page |
|---|---|---|
| Models compared | 24 curated + 370+ via OpenRouter | OpenAI only |
| Workload sliders (req/mo, in tokens, out tokens) | Yes | No |
| Sorted bar chart | Yes | No |
| Flat-plan break-even check | Yes (Plus, Pro, Claude Pro/Max, Cursor, Copilot) | No |
| Prompt-cache toggle | Yes (50% effective discount) | Documentation only |
| Copy as Markdown / CSV export | Yes | No |
| Sign-up | None | None |
Why a multi-provider calculator matters
For the same workload, the spread between cheapest and most expensive models is often 50× or more. Picking the right model for your task — within and across providers — usually saves more money than negotiating a discount. freeaicostcalculator.app makes that decision visual: the bar chart sorts cheapest-first by default, so the right answer is the leftmost (or topmost) bar.
How OpenAI's pricing maps into freeaicostcalculator.app
OpenAI's API blocks direct browser calls (no CORS), so the calculator routes OpenAI models through OpenRouter — same models, browser-callable, single key. GPT-5, GPT-5 mini, GPT-4.1 and o4-mini all appear in the picker tagged "(OpenRouter)" with prices reflecting OpenRouter's pass-through. Pricing matches OpenAI's published rates closely; the small OpenRouter margin is included.
Try freeaicostcalculator.app — Free, No Sign-Up
Workload-driven. 370+ models. Flat-plan break-even check. Pure arithmetic in your browser.
Open AI Cost Calculator →Frequently Asked Questions
Can I use this without an OpenAI account?
Yes. freeaicostcalculator.app does not call OpenAI or any provider — it is pure arithmetic on published pricing. You do not need any account or API key to use the calculator.
Are the OpenAI prices accurate?
They reflect OpenAI's published per-million rates as of 2026-05, accessed via OpenRouter (which adds a small margin). Always verify against OpenAI's current pricing page for production budgeting.
Does it cover OpenAI's o-series and reasoning models?
Yes. o4-mini is in the curated catalog. The full OpenRouter live catalog (visible in the OpenRouter tab) includes every model OpenRouter exposes, which covers OpenAI's reasoning lineup.
Why not call the OpenAI API directly?
OpenAI's API blocks browser CORS for security. A static page cannot call api.openai.com from your browser. OpenRouter is the standard workaround for browser-based tools — same OpenAI models, browser-callable.
Does it model OpenAI's prompt caching discount?
Yes. The "Apply 50% prompt-cache discount" toggle approximates the typical OpenAI cached-prompt savings. For more precise modeling (cache hit rate × discount), run the calculation twice and split traffic.
Can I export the comparison?
Yes. Copy as Markdown table or download as CSV.