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TOKENSE Blog

Claude API pricing math, ChatGPT Plus comparisons, and how BYOK (Bring Your Own Key) works. The full library is in Japanese — see all articles.

料金・計算

How Claude API Pricing Works: Calculate Your Real Cost Per Message

Claude API bills per token: input tokens x price + output tokens x price. Here's Anthropic...

比較

Is ChatGPT Plus Too Expensive? A Pay-Per-Use API Alternative

ChatGPT Plus is a flat $20/month subscription. API access bills per use instead. Here's an...

使い方

How to Get an Anthropic API Key and Use It with a Claude Client

To use Claude on pay-as-you-go pricing, generate your own API key on the Anthropic console...

ノウハウ

7 Ways to Cut Claude API Token Usage and Lower Your Bill

Claude API costs scale directly with input and output tokens, so how you write a prompt ch...

用語解説

What Is BYOK (Bring Your Own Key)? How It Works and Is It Safe

BYOK means bringing your own API key to an app instead of paying its subscription markup. ...

TOKENSEガイド

TOKENSE: A BYOK Claude Client with Automatic Cost Tracking

TOKENSE runs on your own Anthropic API key with built-in per-message cost telemetry. Here'...

料金・計算

Claude API Cost Calculator: How to Estimate Your Real Monthly Spend

A step-by-step Claude API cost calculator guide using Anthropic's official 2026 pricing, worked examples, and the mistakes that make estimates drift...

比較

BYOK AI Chat Apps: 7 Things to Check Before You Switch

Not every BYOK app is built the same way. Here are the 7 things worth checking — key storage, cost visibility, model routing and more...

比較

Claude API vs. Subscription Cost: When Pay-Per-Token Actually Wins

Claude Pro is $20/month and Claude Max starts at $100/month. Here's the real breakeven math against pay-per-token API pricing...