LLM providers price input and output tokens differently, and rates vary a lot between models — a Claude 3 Opus response can cost 10-60x more than a GPT-4o mini response for the same token count. This calculator gives you a quick, static-reference estimate before you commit to a model in production.
What Is the AI Cost Calculator?
AI Cost Calculator is one of the tools in WebdevToolbox’s AI & Prompt Tools category. Pick a model, enter input and output token counts, and see the estimated per-request and monthly cost — all computed locally against a manually maintained pricing table.
How to Use It
- Open the tool at /tools/ai-cost-calculator.
- Choose a model from the dropdown (GPT-4o, Claude 3.5 Sonnet, Gemini 1.5 Pro, and more).
- Enter your input and output token counts — use the LLM Token Counter tool first if you need an estimate.
- Optionally enter requests per day to see a projected monthly cost.
Key Features
- Per-model pricing table — covers GPT-4o family, GPT-3.5, Claude 3 family, Gemini 1.5 family, and a typical hosted Llama 3.1 rate.
- Separate input/output cost breakdown — since output tokens are usually priced higher.
- Monthly projection — multiplies per-request cost by daily volume for quick budget planning.
- 100% client-side — no API keys, no accounts, nothing sent anywhere.
When to Use the AI Cost Calculator
- Choosing a model — compare the cost delta between a flagship model and its cheaper “mini”/“haiku” sibling for your workload.
- Budgeting a feature — estimate monthly spend before shipping an AI-powered feature at scale.
- Vendor comparisons — quickly compare OpenAI, Anthropic, and Google pricing side by side.
Try It Now
Open AI Cost Calculator directly from anywhere on the site using ⌘K and typing the tool name. No login required — everything runs offline-capable in your browser.
Part of the AI & Prompt Tools collection on WebdevToolbox — free, browser-based developer tools with no login required.