Claude vs Gemini

This comparison uses the current IdleForest model for Claude and Gemini: their category, modeled CO2 per use unit, methodology notes, key drivers, and assumptions.

Supporting comparison page

Claude

140g

CO2 / HOUR

Gemini

145g

CO2 / HOUR

Higher emissions

Data-backed comparison

Summary

When comparing Claude and Gemini, Gemini generates significantly more CO2 emissions per hour (145g) than Claude (140g). Both applications rely on devices, networks, and server infrastructure, which all contribute to their environmental impact.

Why the gap happens

Gemini is modeled at 145g CO2 per unit, while Claude is modeled at 140g, so the visible gap is 5g in the current dataset.
Both products sit in the AI category, so the difference comes from the per-product estimate and page-level methodology fields rather than a category change.
Model inference runs on accelerator-heavy infrastructure rather than lightweight web hosting.

What to act on first

Because Gemini is higher in the current model, start there: Batch related prompts instead of repeating similar requests in separate sessions.

Gemini is currently modeled at 5g CO2 more per unit of use than Claude.

Deep dive into their footprints

Read the full Claude report Read the full Gemini report

Comparison takeaways

Gemini is modeled at 145g CO2 per unit, while Claude is modeled at 140g, so the visible gap is 5g in the current dataset.

Both products sit in the AI category, so the difference comes from the per-product estimate and page-level methodology fields rather than a category change.

About IdleForest

IdleForest is a desktop app that plants trees in the background while your computer is idle. It uses your unused internet bandwidth to fund reforestation projects.

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