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Accurate token counting for all major AI providers and models
| Provider | Models | Context Window |
|---|---|---|
| OpenAI | GPT-5.2GPT-5.2 ProGPT-5 miniGPT-4.1GPT-4.1 miniGPT-4.1 nanoo4-mini | Up to 400K |
| Anthropic | Claude Opus 4.5Claude Sonnet 4.5Claude Opus 4Claude Sonnet 4Claude Haiku 3.5 | 200K (1M beta) |
Gemini 3 ProGemini 3 FlashGemini 2.5 ProGemini 2.5 FlashGemini 2.0 Flash | Up to 2M | |
| Meta | Llama 3.3 70BLlama 3.2 90BLlama 3.1 405BLlama 3.1 70BLlama 3.1 8B | Up to 128K |
| Mistral | Mistral LargeMistral MediumMistral SmallCodestralPixtral | Up to 128K |
Learn about tokens, pricing, and AI development
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Common questions about AI tokens, pricing, and our tools
AI Tools Kit provides essential utilities for developers and content creators working with large language models like GPT-5, Claude 4.5, Gemini 3, and other AI systems. Our token calculator helps you understand exactly how your text will be processed by AI models, enabling you to optimize prompts and reduce API costs.
Accurately count tokens before sending requests to OpenAI, Anthropic, or other AI providers. Understand how tokenization works and see exactly how your text breaks down into tokens. Support for multiple models including GPT-5, GPT-4.1, Claude 4.5, and more.
Token Optimized Object Notation (TOON) reduces your JSON payload size by up to 50%, saving tokens and reducing API costs. Convert between JSON and TOON formats instantly with our free converter tool.
Browse our curated collection of effective prompts for writing, coding, business, education, and creative tasks. Copy and customize prompts to get better results from AI models.