OpenAI GPT Token Estimator

Estimate token counts and costs for GPT-4 and GPT-3.5 models with batch CSV/TSV processing and pricing calculations.

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• OpenAI Tokenization: GPT models use BPE (Byte Pair Encoding). On average, 1 token ≈ 0.75 words in English. Special characters and emojis consume more tokens.
• OpenAI Batch API: Save 50% on costs with OpenAI's Batch API for non-urgent requests with 24-hour completion window.
• GPT-4 vs GPT-3.5: GPT-3.5-Turbo costs 20x less than GPT-4. For marketing copy and simple tasks, GPT-3.5 often suffices.
• Context Windows: GPT-4 Turbo supports 128K tokens, GPT-3.5 Turbo supports 16K tokens. Always leave ~20% buffer for responses.
• Token Optimization: Use the official OpenAI tiktoken library for exact counts. This estimator provides ±15-20% accuracy for quick assessments.
• Cost Management: Set usage limits in your OpenAI account. Monitor daily spend and implement request throttling for production use.