Alibaba · released 2026-02-24
Qwen3.5-2B uses about 0.012 Wh of electricity to answer a typical question. A long, complex answer costs about 23× more, at 0.285 Wh. That places it 28 of 266 among the models we can measure, and every figure here is calculated the same way as every other model.
Calculated Calculated from a published parameter count. Every model on this site is calculated the same way, so the comparison holds even where the absolute value carries uncertainty. Our figures are good to roughly a factor of two to three, which is why we only ever state a difference of 5× or more.
Energy cannot be worked out without knowing how big a model is. Of the 45 models from Alibaba that we track, 25 can be assessed at all — the rest publish too little for anyone outside the company to calculate anything.
Capability and the roster come from Epoch AI, whose Capabilities Index is the 58-benchmark composite quoted above. Energy is calculated with EcoLogits and calibrated against laboratory measurements from ML.ENERGY. Human preference comes from LMArena. All four are public and free; the full method is here.
These figures are published under CC BY 4.0 — use them anywhere, including commercially, with credit to The AI Footprint.
Compare Qwen3.5-2B with another model