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Introducing LEAN, a format that beats JSON, TOON, and ZON on token efficiency (with interactive playground)

Reddit · Suspicious-Key9719 · April 13, 2026
If you're feeding structured data to LLMs, you're probably wasting tokens on JSON overhead: repeated keys, quotes, braces, commas. I built LEAN (LLM-Efficient Adaptive Notation) to fix that. Benchmark results (avg token savings vs JSON compact, 12 datasets):

Detailed Analysis

Detailed analysis coming soon.

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