LLM Token Cost Estimator

Compare input/output token API costs across OpenAI GPT-4o, Anthropic Claude 3.5, and Google Gemini models.

シェア:

主な特徴とプライバシー保証

  • ✓ 100%ブラウザ内完結: データは端末外に出ず、外部サーバーに送信されることはありません。
  • ✓ リアルタイム高速出力: ネットワーク遅延ゼロ、入力と同時に即時反映・高速コピー。
  • ✓ 永久無料＆制限なし: 会員登録不要、課金なし、1日の利用制限も一切ありません。
  • ✓ 標準規格準拠: RFC、ISO、W3Cウェブ標準仕様に厳密に準拠して設計されています。

Compare AI model API costs per request and per month

Calculate exact API costs for GPT-4o, GPT-4o-mini, Claude 3.5 Sonnet, Haiku, Gemini 1.5 Pro, and DeepSeek models based on your token usage.

技術仕様とアーキテクチャ

Execution Environment:
100% Client-Side Browser Sandbox
Data Privacy:
Zero Server Storage / No Tracking
Processing Speed:
Real-time local CPU execution
Cross-Platform:
Works on Windows, macOS, Linux, iOS & Android

Prompt Engineering & Token Estimation Engine

LLM utilities evaluate prompt lengths, structure system instructions, and calculate approximate token counts based on byte-pair encoding (BPE) algorithms used by OpenAI, Anthropic, and Google models. This helps prevent token budget overflows and optimizes monthly API expenditure.

1

Provide Input

Enter, paste, or upload your data into the input field above.

2

Configure & Process

The tool immediately processes your input in real time according to your chosen settings.

3

Copy or Save

Use the Copy button to copy the output to your clipboard, or download the result to your device.

開発者メモ: Counting tokens before calling expensive LLM APIs prevents unexpected bill spikes and truncated model responses.

主な利用シーン

  • Budget monthly API costs for AI startups and LLM wrapper products
  • Compare token pricing between GPT-4o, Claude 3.5 Sonnet, and Gemini 1.5 Pro
  • Optimize prompt lengths to reduce OpenAI API bills

関連のおすすめツール

Prompt Token Counter LLM Cost Calculator

連携ツール・次のステップ

LLM Token Cost Estimator & Model Pricing Comparisonと合わせてよく使われる便利な開発者ユーティリティ

Popular in Category llm-tools

Prompt Token Counter

Count characters, words, and estimate tokens for LLM prompts. Useful for OpenAI, Claude, and other AI APIs.

ツールを使う →
Popular in Category llm-tools

LLM JSON Extractor

Extract JSON from LLM responses. Parse code blocks and clean malformed JSON from AI output.

ツールを使う →
Popular in Category llm-tools

MCP Tool Schema Generator

Generate Model Context Protocol (MCP) tool definitions. Create name, description, and inputSchema JSON for MCP servers.

ツールを使う →

その他 AI・LLM関連ツール

Prompt Token Counter

Count characters, words, and estimate tokens for LLM prompts. Useful for OpenAI, Claude, and other AI APIs.

LLM JSON Extractor

Extract JSON from LLM responses. Parse code blocks and clean malformed JSON from AI output.

MCP Tool Schema Generator

Generate Model Context Protocol (MCP) tool definitions. Create name, description, and inputSchema JSON for MCP servers.

MCP Config Formatter

Format and validate MCP server configuration (mcp.json). Pretty-print and check structure for Cursor, Claude, and other MCP clients.

llms.txt Generator

Generate llms.txt for your website. Creates AI-readable discovery file with name, summary, contact, and services. Spec 1.1.1 compatible.

Prompt Template Builder

Build prompts with {{variable}} placeholders. Fill in values and preview. For reusable AI prompts.

System Prompt Generator

Generate system prompts for LLMs. Role, task, constraints, output format. For ChatGPT, Claude, etc.

Few-Shot Prompt Builder

Build few-shot prompts with input-output examples. Structure examples for in-context learning.

よくある質問

How is LLM API pricing calculated?
LLM providers charge per 1 Million (1M) input tokens and output tokens. Output tokens are typically 3x to 4x more expensive than input tokens.
How many words are in 1,000 tokens?
In English, 1,000 tokens equal approximately 750 words (or ~4,000 characters).
Which AI model is most cost-effective for high volume?
GPT-4o-mini, Gemini 1.5 Flash, and DeepSeek-V3 offer the lowest cost per 1M tokens for lightweight tasks.