Dev tools · alternatives · 2026

24 alternatives to OpenAI API Test & Calculator

test your OpenAI API key and calculate costs of OpenAI APIs.

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. OpenAI API Test & Calculator launched in 2023; newer entries below may have overtaken it.

1. 1
   OpenAI Price Calculator▲104

   Estimate price for using OpenAI API

   2023 · invertedstone.com · its alternatives →

2. 2
   OpenAI API Cost Calculator▲2

   free tool that can be used to calculate the api costs

   2023 · openaiapitest.surge.sh · its alternatives →

3. 3
   OpenAI API Analytics▲132

   Analyze your OpenAI API usage and logs in real-time

   2023 · llm.report · its alternatives →

4. 4
   Free LLM API Pricing Calculator▲175

   Calculate and compare the cost of the latest LLM APIs

   2024 · docsbot.ai · its alternatives →

5. 5
   Puddl▲604

   Get complete breakdown of OpenAI API usage for free

   2023 · puddl.io · its alternatives →

6. 6
   OpenAI o1 API ▲458

   OpenAI's most advanced model, o1 API to third-party devs

   2024 · developers.openai.com · its alternatives →

7. 7
   TestAI▲402

   1,000+ automated tests for AI agents in one click

   2025 · nbulatest.ai · its alternatives →

8. 8
   EarlyAI▲356

   AI Agent for test code generation

   2024 · startearly.ai · its alternatives →

9. 9
   Cursor for your API▲473

   Generate, edit, lint & test your API workflow in one place

   2025 · app.getelva.ai · its alternatives →

10. 10
    OpenAI o3-mini▲510

    Pushing the frontier of cost-effective reasoning

    2025 · openai.com · its alternatives →

11. 11
    App Cost Calculator▲257

    Plan your app development budget within 2 minutes

    2017 · cleveroad.com · its alternatives →

12. 12
    AI API Pricing Calculator▲14

    Estimate price for using different AI model API's

    2025 · tap2solve.com · its alternatives →

13. 13
    OpenAI Responses API and Agents SDK▲190

    New tools for building agents and tools

    2025 · openai.com · its alternatives →

14. 14
    AiPrice▲96

    API for calculating OpenAI LLM tokens and pricing

    2023 · aiprice.dev · its alternatives →

15. 15
    KushoAI▲282

    Open-source AI tester that lives in your CLI

    2024 · kusho.ai · its alternatives →

16. 16
    Kipps.AI CostLens: Open Source▲19

    Stop guessing your AI costs

    May 2026 · costlens.kipps.ai · its alternatives →

17. 17
    OpenAI API calculator by BOTWISE▲2

    Simple OpenAI calculator to estimate API costs.

    2023 · botwise.io · its alternatives →

18. 18
    OpenAI Cookbook▲135

    Examples and guides for using the OpenAI API

    2023 · github.com · its alternatives →

19. 19
    AI Cost Calculator▲7

    Compare llm api prices

    Oct 2025 · aicostcalc.dev · its alternatives →

20. 20
    ApiHome▲73

    Home of API testing

    2022 · apihome.io · its alternatives →

21. 21AO
    An Open-Source iPad Calculator and Why Your App Won’t Make Any Money▲10

    2018 · medium.com · its alternatives →

22. 22
    OpenAI ChatGPT API Pricing Calculator▲3

    API Pricing Calculator for OpenAI's ChatGPT

    2023 · openai.helemento.com · its alternatives →

23. 23
    api-usage▲1

    Track your OpenAI API token usage & cost.

    2023 · apiusage.info · its alternatives →

24. 24
    API Pick▲71

    Data APIs for AI agents & developers — free to start

    Feb 2026 · apipick.com · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →