Eleven is AI-written, and the honest carbon ledger has two halves: what it cost to build the app (the AI tokens spent writing it) and what it costs to run it (every service in the fleet, every day). Building is one-time and grows only as more AI development happens; running is ongoing and rises with the fleet. Full methodology and honesty notes: the carbon comparison.

Last measured

Built — one-time, to make it

A running estimate of the CO₂e cost of the LLM tokens spent building Eleven. Token counts are exact; the carbon conversion is an estimate with wide error bars, because no model provider publishes per-token figures — —. This grows only when more AI development happens.

Central estimate
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Honest range
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Output tokens
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That’s about the same CO₂e as, centrally:

Accrual over time

Cumulative CO₂e — the line is the central estimate, the wash is the low–high band. Exact figures are in the ledger below.

The ledger (central estimate per period)

Run — ongoing, to operate it

A live estimate of the CO₂e cost of running every service in the fleet — the router box and its instances, object storage, and bot inference — banded low to high. It rises as boxes are added; the per-space figure is what stays meaningful at any size.