iOPTERA is a free AI token cost auditor that helps developers and businesses calculate and compare API costs across major LLMs including OpenAI, Anthropic Claude, and Google Gemini.

How does the token cost calculator work?

Enter your input and output token counts, select your AI model, and iOPTERA instantly calculates your cost per million tokens with optimization recommendations.

Which AI models does iOPTERA support?

iOPTERA supports all major LLMs including GPT-4o, GPT-4.1, Claude Sonnet, Claude Haiku, Gemini 1.5 Pro, Gemini 2.0 Flash, and more.

Is iOPTERA free to use?

Yes, iOPTERA is completely free. All calculations run locally in your browser — no data is sent to any server.

LLM COST INTELLIGENCE

Model choice isa cost decision.

We measure the real price and the independent benchmark of 23 models, hourly. Choose what you run today and see what the same work actually costs elsewhere.

I currently use:

Current

$900

GPT-4o

Routed

$94

DeepSeek V3.2

Annual difference

$806

−90%

based on 30M tokens/month

LIVE PRICINGREAL-TIME

DeepSeek V3.2

$0.26/1M tokens

Gemini 1.5 Pro

$1.25/1M tokens

GPT-4o

$2.50/1M tokens

Claude 3.5 Sonnet

$3.00/1M tokens

View all 23 models

23Models Tracked

6Providers

$1.99Avg Input / 1M

5Languages

HourlyData Sync

TOOLS

EVERYTHING YOU NEED

Model Compare

Side-by-side price and benchmark comparison across all major AI models.

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AI Leaderboard

Models ranked by value, speed, coding, reasoning, creative, and vision.

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Token Counter

Count tokens precisely with the GPT-4 tokenizer. See cost across every model instantly.

Explore

Prompt Compressor

Optimize prompts and system instructions to reduce token size and cost instantly.

Explore

Savings Calculator

Calculate how much you could save by switching AI providers.

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Hype Tracker

Which AI is trending on HackerNews this week? Real data, updated hourly.

Explore

AI Glossary

50+ AI and LLM terms explained clearly. Your reference for AI terminology.

Explore

Use Case Library

30 AI use cases with model recommendations, cost estimates, and tips.

Explore

AI vs Human

Is it cheaper to hire a human or use AI? Calculate by role and region.

Explore

REAL SAVINGS

SEE HOW MUCH YOU COULD SAVE

Pick a real use case. See what you're paying now — and what you could pay instead.

Monthly volume: 500K tokens/month · e.g.: ~500 chat sessions

Most people use

$2.75/ month

GPT-4o

OpenAI

$65.28 / year

BEST VALUE

With iOPTERA you'd use

$0.06/ month

GPT-5 Nano

OpenAI

$0.72 / year

Your monthly saving

$2.69/ month-98%

= $32.28 saved per year

ABOUT THIS SITE

WHAT IS iOPTERA?

There are dozens of AI tools — ChatGPT, Claude, Gemini, and many more. They all do similar things, but their prices can differ by up to 100x. Most people just pay whatever the popular option costs without knowing there's a better deal.

iOPTERA compares all of them in one place — prices, quality, speed — so you can pick the right AI for your job and stop overpaying. Free, no sign-up needed.

23+

Compare 23+ AI models

Side-by-side price, speed, and benchmark data for every major model.

97%

Save up to 97%

The cheapest models are often just as capable for common tasks.

Free, no sign-up

No account needed. Just open the site and start comparing.

Custom Comparison