The carbon footprint of Claude Pro
Anthropic publishes no per-prompt energy or emissions figures, so this estimate uses Microsoft's published measurements of comparable frontier-scale models as a stand-in. Below is what a Claude Pro subscription plausibly emits in a month, with every assumption shown, and a pass that funds well beyond it.
Not disclosed
Claude Pro$20/mo plan · Standard paid Claude usage
Estimated emissions a month
4.6 g – 1.6 kg CO₂e
At the high end, about 0.17 quarter-pound beef burgers a month.
Everyday pass · $3 a month
Funds about 110 kg of verified carbon credits a month — roughly 70× the high end of this estimate.
The assumptions
- Pro
- 10 to 100 queries a day, with up to 25% long reasoning answers at the high end.
- Per query
- Anthropic publishes no per-prompt energy, emissions or water figures. We show Microsoft's measured range for a frontier-scale query as a stand-in. Reasoning-heavy use costs far more: the same study puts a ~5,000-token reasoning answer at 4.32 Wh.
- Left out
- Image and video generation, and the large contexts coding agents read on every step — no published study measures those yet.
Plan details from Anthropic — Claude pricing, checked 2026-09-15. Carbon Shredder is not affiliated with Anthropic. How we estimate every plan.
Common questions
- How much CO₂ does Claude Pro produce?
- By our estimate, 4.6 g – 1.6 kg CO₂e a month — from light use to hard daily use with long reasoning answers. Nobody outside Anthropic knows actual usage, so this is a range, not a measurement.
- Does Anthropic publish the environmental impact of Claude Pro?
- Anthropic publishes no per-prompt energy or emissions figures, so this estimate uses Microsoft's published measurements of comparable frontier-scale models as a stand-in.
- What does the climate pass for Claude Pro fund?
- The Everyday pass costs $3 a month and funds about 110 kg of verified carbon credits at today's price — roughly 70× the high end of our estimate. The credits are retired in your name with registry serial numbers.
- Does the pass make Claude Pro carbon neutral?
- No. It funds verified carbon credits, which you can check on a public registry. The emissions from your AI use still happened — the honest claim is how many kilograms of credits you funded.