Type or paste your text below to get real-time character counts, UTF-8 bytes, word metrics, and estimated LLM token usage.
Specification: UTF-8 byte encoding standard & BPE tokenization benchmark weights
As of: November 2026
| 500 characters (~100 words) | ~125 tokens (500 bytes) |
| 1,500 characters (~300 words) | ~375 tokens (1,500 bytes) |
| 3,000 characters (~600 words) | ~750 tokens (3,000 bytes) |
| 6,000 characters (~1,200 words) | ~1,500 tokens (6,000 bytes) |
Modern Large Language Models (GPT-4o `o200k_base`, Claude 3.5, Gemini) split text into subword units called tokens. In English, 1 token averages ~4 characters or ~0.75 words, while CJK (Korean/Japanese/Chinese) characters and code symbols consume roughly 0.7 to 1.2 tokens per character.
Trimming redundant filler instructions, whitespace, and verbose JSON keys can shrink system prompts by 25–40% without losing accuracy—directly reducing Time-to-First-Token (TTFT) and API billing.
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