Free AI API Cost Tools
for Agencies & Developers
AISpend is a free, independent toolkit for developers, agency owners, and business operators who need clear, unbiased numbers when making AI model decisions. No sign-up, no paywall, no vendor affiliation — just accurate list-rate data and straightforward tools built to help you stop overpaying for AI infrastructure.
What AISpend Does
AI API bills can spiral fast when you're running thousands of tasks a month — especially when you don't know the real cost difference between models, or how much of your bill comes from output tokens vs. input tokens. AISpend gives you three free calculators to answer those questions with real numbers, not estimates.
All pricing data covers 30+ models across OpenAI, Anthropic, Google, Meta, DeepSeek, Qwen, Mistral, Kimi, and Grok. Rates are updated with every major release and represent list pay-as-you-go API prices — the numbers you'll actually see on your invoice.
The Tools
How much does your AI workflow cost per month?
Enter your run volume, average token counts per call, and model. Get your exact monthly and annual cost, ranked against all 18 tracked models, with potential savings vs. the cheapest option and cached-input pricing breakdowns.
Is this AI task actually worth the cost?
Pick a task type, choose your model, enter your hourly rate and time saved per task. Get an instant ROI verdict — whether the AI spend earns its keep in time value — so you can present clear numbers to clients and stakeholders instead of guesses.
What does 100,000 tokens actually look like?
Click real-world objects — novels, tweets, codebases, transcripts, PDFs — to build a context window and instantly see what it costs to process across all tracked models. Makes abstract token counts tangible.
Why We Built This
The difference between the cheapest and most expensive AI model for the same task can be 100x in monthly cost. Most developers and agency operators don't realise this until they get a surprise invoice. AISpend exists to surface those tradeoffs before they hit your billing dashboard.
We don't have partnerships with any AI provider and we don't recommend specific models — the tools just show you the numbers and let you decide.
Blog & Guides
The AI cost blog covers model pricing comparisons, token fundamentals, and monthly budgeting strategy — written for operators who need actionable numbers, not benchmarking hype.
Contact
Questions, corrections, pricing updates, or partnership enquiries:
hello@promptcost.help
Pricing data represents list pay-as-you-go API rates as of February 2026. Verify rates at your provider's official pricing page before budgeting.