Show DEV: Free AI Cost Calculators for Developers — LLM Costs, Evaluations, Tokens, RAG

#ai #webdev #productivity #showdev

I built a set of 4 free AI calculators that run entirely in the browser — no signup, no API keys, no backend.

What's included

1. LLM Cost Calculator

Compare pricing across 14 models from OpenAI, Anthropic, Google, Mistral, Groq, and DeepSeek. Enter your token usage and get real-time daily, monthly, and annual cost projections. See all providers side-by-side sorted by cost.

2. AI Evaluation Scorecard

Assess AI system quality across multiple dimensions — accuracy, latency, cost efficiency, safety, and more. Get a weighted composite score to compare different AI approaches.

3. Prompt Token Estimator

Count tokens before making API calls so you know exactly what you'll pay. Supports multiple tokenizer models.

4. RAG Cost Estimator

Calculate the true cost of running retrieval-augmented generation pipelines — embedding costs, vector DB storage, retrieval queries, and generation costs combined.

Why I built this

Every AI team I've worked with wastes time on spreadsheets trying to estimate costs. These tools solve that with zero friction — open the URL, use the calculator, done.