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Claude Code session, 2026-09-18 to 2026-10-07

[t:d31cd647aef7f401] · claude-code · reported by claude-code · 2026-10-09T07:14:35Z · generation 1, amends 1f7837f19016718b

1279.348Wh, whole session
342.865g CO₂e location · 115.141 market
6694.8mL water, on + off-site
1279.348Wh per session

EF 3.1 single score: 15.54 µPt

About 11 minutes of an average person's yearly footprint in these categories. 9 of 16 categories, 72% of the EF weight. Fossil resource use counts the fuel burnt for dutch electricity, not its supply chain; water scarcity uses the aware factor for the netherlands (0.957).

categoryamountscoreweight
Climate change0.3429 kg CO2 eq9.56 µPt21.06%
Water use0.006408 m3 world eq deprived0.05 µPt8.51%
Resource use, fossils4.202 MJ5.38 µPt8.32%
Resource use, minerals and metals4.213e-08 kg Sb eq0.05 µPt7.55%
Acidification0.0001348 mol H+ eq.0.15 µPt6.20%
Eutrophication, terrestrial0.0002259 mol N eq.0.05 µPt3.71%
Eutrophication, marine4.167e-05 kg N eq.0.06 µPt2.96%
Photochemical ozone formation0.0001136 kg NMVOC eq.0.13 µPt4.78%
Particulate matter7.285e-10 disease incidences0.11 µPt8.96%

of the energy: measured 0% modelled 0% assumed 100%

componentkindWhg CO₂emL
Claude Code, claude-opus-5
anthropic/claude-opus-5 · NVIDIA H100 SXM5 80GB · 257 req · 2744891 in / 181287 out · batch 32 · bf16 · size inferred 69.7 B · grade G? at 4.1531 Wh per request
Measured from the session transcript: 257 requests on claude-opus-5. Prompt tokens are those actually computed (fresh input plus cache writes); 129,540,454 more were read from the prompt cache and are not recomputed, and loading that cache is not modelled. The model's size is not published, so it is inferred from its price.
assumed1067.3567286.05165585.478
Claude Code, claude-fable-5-1
anthropic/claude-fable-5.1 · NVIDIA H100 SXM5 80GB · 110 req · 725426 in / 179271 out · batch 32 · bf16 · size inferred 93.0 B · grade G? at 1.9272 Wh per request
Measured from the session transcript: 110 requests on claude-fable-5-1. Prompt tokens are those actually computed (fresh input plus cache writes); 32,380,317 more were read from the prompt cache and are not recomputed, and loading that cache is not modelled. The model's size is not published, so it is inferred from its price.
assumed211.991456.81371109.351

Outcome. A Claude Code session, reported automatically when it ended. What it was for is deliberately not recorded here.

Links. claude_session 09483a24-a20c-4c01-b299-99b7a4c79dd2

Seal holds · 1 scoring pass(es) · estimator TELOS-lite 1.2 · roofline · EF 3.1 · not counted: host CPU, memory, network and storage, hardware manufacture, model training, anything not listed as a component.