gCO₂ per million tokens

Also: carbon per token · ai carbon footprint · kwh per token

Grams of CO₂ (and kWh of electricity) per million output tokens — the sustainability twin of $/M-token. It is driven by the model’s active parameters, the serving chip’s efficiency (bandwidth and power), the batch size, datacenter PUE, and the grid’s carbon intensity. Like $/M-token it normalizes footprint across models and hardware.

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