AI API Cost Calculator
Compare per-request and at-scale costs across 12 frontier AI models — caching included.
What is AI API Cost Calculator?
A free, no-sign-up calculator that estimates the cost of running any prompt across every major AI model in 2026. Includes prompt-caching discounts most calculators miss, and scales up to 1M requests/day to show real monthly bills.
Built in-house at There Is An AI Tool. Math runs entirely in your browser — no API calls, no rate limits. Up-to-date pricing for GPT-5, Claude Opus 4.7, Gemini 3.5 Pro, DeepSeek V3, Llama 3.3, Mistral Large 2, Grok 4 and seven more models. The caching toggle is the differentiator: most calculators ignore prompt caching, which can cut input cost by 50-90% for repeat-context workflows.
Key features
- 12 frontier + budget models compared side-by-side
- Prompt-caching discounts built in
- Scale from 1 to 1M requests/day with monthly view
- Paste prompt OR enter token counts directly
- No sign-up, no rate limit — runs in your browser
Pros
- The caching toggle is genuinely useful — most calculators ignore it
- Side-by-side comparison saves checking 12 provider docs
- "Last verified" date shown so you know how fresh the data is
Cons
- Token estimation is ~80% accurate (4-chars-per-token heuristic)
- Pricing changes monthly — manually re-verified
- Does not handle multimodal pricing (images, audio) yet
Best for
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